MAX3162ECAI+T [MAXIM]
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO28, 5.30 MM, MO-150, SSOP-28;
| 型号： | MAX3162ECAI+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO28, 5.30 MM, MO-150, SSOP-28 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总26页 (文件大小：361K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
1ꢀ5kVEꢁSD-ProteotꢂdV 3ꢃ0kVor
ꢀꢃꢀkdV10nAdVRꢁD232/RꢁD48ꢀ/
MAX3160E/MAX3161E/MAX3162E
GtntPalVStsePipoirn
RꢁD422VMuloipProrerlVTPansetivtPs
BtntfiosVanꢂVFtaouPts
The MAX3160E/MAX3161E/MAX3162E are programma-
ble RS-232/RS-485/RS-422 multiprotocol transceivers.
The MAX3160E/MAX3161E are pin programmable as a
2Tx/2Rx RS-232 interface or a single RS-485/RS-422
transceiver. The MAX3162E is configured as a 2Tx/2Rx
RS-232 interface, and a single RS-485/RS-422 trans-
ceiver simultaneously.
• Flexible Options for RS-232 and RS-422/485
Operation In One Package
• Simultaneous 2Tx/2Rx RS-232 and Half-Duplex
RS-485 Transceiver Operation (MAX3162E)
• Pin-Programmable As Either 2Tx/2Rx RS-232 or
Half/Full RS-485 Transceiver (MAX3160E,
MAX3161E)
The MAX3160E/MAX3161E/MAX3162E feature
enhanced electrostatic discharge (ESD) protection. All
of the transmitter outputs and receiver inputs are pro-
tected to 15ꢀk using the ꢁuman ꢂody Model.
• Integrated Protection Increases Robustness
• High 15kꢀ ESD HꢁM per ꢂEDEꢃ ꢂS-001-2012
• Transmitters and Receivers Protected Against
Wiring Faults
All devices incorporate a proprietary low-dropout trans-
mitter output stage, and an on-board dual charge
pump to allow RS-232- and RS-485-/RS-422-compliant
performance from a +3k to +5.5k supply. These
devices also feature pin-selectable transmitter slew
rates for RS-232 and RS-485/RS-422 modes. Slew-rate
limiting minimizes EMI and reduces reflections caused
by improperly terminated cables, allowing error-free
data transmission up to 250ꢀbps. Disabling slew-rate
limiting allows these devices to transmit at data rates
up to 10Mbps in RS-485/RS-422 mode and up to
1Mbps in RS-232 mode.
• True Fail-Safe Receiver Prevents False Transition
on Receiver Input Short or Open
• Short-ꢃircuit Protection Over the Entire ꢃommon-
Mode ꢀoltage Range
• Thermal Protection from Excessive Power
Dissipation
• Slew Rate Limiting Minimizes EM and Reduces
ꢃable Reflections
• Integrated ꢃharge Pump ꢃircuitry Saves ꢁoard
Space
• Eliminates the Need for a ꢁipolar 12ꢀ Supply
• Enables Single Supply Operation From +3ꢀ to
+5.5ꢀ ꢀoltage Supply
The MAX3160E/MAX3162E offer a flow-through pin-
out that facilitates board layout. The MAX3160E/
MAX3161E/MAX3162E are available in tiny SSOP pacꢀ-
ages and operate up to -40°C to +85°C temperature
ranges.
• 1µA Shutdown Supply ꢃurrent Saves Power
• Allows Up To 256 Transceivers on the ꢁus
TypiealVOptPaoingVCiPeuio
Applieaoirns
Point-of-Sales Equipment
Industrial Controls
Peripherals
+3V TO +5.5V
Networꢀing
2
RS-232 to RS-485
Interface Converters
Security Systems
V
CC
RS-485/RS232
11
MAX3160E
DI/T1IN
TX
Z(B)/T1OUT
13
5
16
RTS
DE485/T2IN Y(A)/T2OUT
6
11
12
15
8
DB9
MAX3100
RO/R2OUT
R1OUT
A/R2IN
B/R1IN
RX
13
14
CTS
7
10
GND FAST HDPLX SHDN
10
SPI
RJ45
4
9
12
µP
SHDN
Ordering Information appears at end of data sheet.
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
19-3580; Rev 1; 5/15
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
AbsrluotVMaximumVRaoings
k
CC
to GND..............................................................-0.3k to +6k
Output Short-Circuit Duration
k+ to GND................................................................-0.3k to +ꢄk
k- to GND. ................................................................-ꢄk to +0.3k
k+ - k- (Note 1)....................................................................+13k
Input koltages
T1IN, T2IN, DI, DE485, RE485, TE232, RE232, SHDN,
FAST, ꢁDPLX, RS485/RS232 to GND. .................-0.3k to +6k
A, ꢂ, R1IN, R2IN to GND ................................................. 25k
Output koltages
T1OUT, T2OUT, Y, Z ..............................................Continuous
Continuous Power Dissipation (T = +ꢄ0°C)
A
20-Pin SSOP (derate 8.0mW/°C above +ꢄ0°C) ...........640mW
24-Pin SSOP (derate 8.0mW/°C above +ꢄ0°C) ...........640mW
28-Pin SSOP (derate 9.1mW/°C above +ꢄ0°C) ...........ꢄ2ꢄmW
Operating Temperature Ranges
MAX316_CA_......................................................0°C to +ꢄ0°C
MAX316_EA_...................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
T1OUT, T2OUT, Y, Z to GND (k
= 0 or
CC
SHDN = GND) .............................................................. 13.2k
T1OUT, T2OUT to GND (k = 5.5k and
CC
SHDN = k ) .....................................................-13.2k to +9k
CC
R2OUT, R1OUT, RO to GND..................-0.3k to (k
+ 0.3k)
CC
Note 1: k+ and k- can have maximum magnitudes of ꢄk, but their absolute difference cannot exceed 13k.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ElteoPiealVChaPaeotPisoiesV(ernoinutꢂ)
(k
= +3k to +5.5k, C1–C4 = 0.1µF when tested at +3.3k 10ꢃ; C1 = 0.04ꢄµF and C2, C3, C4 = 0.33µF when tested at +5k 10ꢃ;
CC
T
A
= T
to T
, unless otherwise noted. Typical values are at k = +3.3k and T = +25°C.) (Note 2)
CC A
MIN
MAX
PARAMETER
DC CHARACTERISTICS
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX3160E/MAX3161E, no load,
RS-485/RS-232 = GND
1.2
2.8
k
Standby Current
I
mA
µA
CC
CC
MAX3160E/MAX3161E, no load,
2.5
3
5.5
6
RS-485/RS-232 = k
CC
MAX3162E, no load
SHDN = GND, receiver inputs open or
grounded
k
Shutdown Current
I
0.01
1
CC
SꢁDN
RE485
RE232
RS-232
)
TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485,
, TE232,
, FAST, HDPLX, SHDN, RS-485/
0.8
Logic-Input Low
k
k
IL
k
k
= +3.3k
= +5k
2.0
2.4
CC
CC
Logic-Input ꢁigh
k
k
Iꢁ
Logic-Input Leaꢀage Current
Transmitter Logic ꢁysteresis
I
0.01
0.5
1
µA
k
INL
k
ꢁYS
RS-232 AND RS-485/RS-422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)
Receiver Output-koltage Low
Receiver Output-koltage ꢁigh
k
I
= 2.5mA
= -1.5mA
0.4
k
k
OL
OUT
OUT
k
I
k
- 0.6
CC
Oꢁ
Receiver Output Short-Circuit
Current
I
I
0 ≤ k ≤ k
CC
20
85
1
mA
µA
OSR
OZR
O
Receiver Output Leaꢀage
Current
Receivers disabled
0.05
www.maximintegrated.com
Maxim Integrated | 2
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
ElteoPiealVChaPaeotPisoiesV(ernoinutꢂ)
(k
= +3k to +5.5k, C1–C4 = 0.1µF when tested at +3.3k 10ꢃ; C1 = 0.04ꢄµF and C2, C3, C4 = 0.33µF when tested at +5k 10ꢃ;
CC
T
A
= T
to T
, unless otherwise noted. Typical values are at k = +3.3k and T = +25°C.) (Note 2)
MAX CC A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RS-232 RECEIVER INPUTS (R1IN, R2IN)
Input koltage Range
-25
+25
0.8
k
Logic-Input Low
k
k
= +3.3k
= +5k
2.0
2.4
CC
CC
Logic-input ꢁigh
k
k
Input ꢁysteresis
0.5
5
k
k
= +3.0k to 5.5k
= 0
3
6
ꢄ
CC
CC
Input Resistance
ꢀΩ
11
16
RS-485/RS-422 RECEIVER INPUTS (Note 3)
MAX3160E
48
96
Input Resistance
R
IN
-ꢄk < k
< +12k
ꢀΩ
CM
MAX3161E/
MAX3162E
k
k
k
k
= +12k
= -ꢄk
0.25
CM
CM
CM
CM
MAX3160E
MAX3161E/MAX3162E
-ꢄk ≤ k ≤ +12k
-0.15
0.125
-0.0ꢄ5
-50
Input Current
I
mA
IN
= +12k
= -ꢄk
Input Differential Threshold
Input ꢁysteresis
k
-200
mk
mk
Tꢁ
CM
Δk
30
Tꢁ
RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)
ꢂoth transmitter outputs loaded with 3ꢀΩ
to GND
Output koltage Swing
5
5.4
k
Output Resistance
k
= k+ = k- = 0, T_OUT = 2k
300
10M
30
Ω
CC
Output Short-Circuit Current
I
T_OUT = GND
60
125
25
mA
SC
MAX3160E
MAX3161E
MAX3162E
k
=
9k
OUT
TE232 = GND or SHDN =
GND
Output Leaꢀage Current
I
µA
O
25
RS-485/RS-422 TRANSMITTER OUTPUTS (Y, Z)
R = 2ꢄΩ
(RS-485)
1.5
2
Differential Output koltage
k
Figure 1
k
OD
R = 50Ω
(RS-422)
Change in Magnitude of
Differential Output koltage for
Complementary Output States
|Δk
|
|
R = 2ꢄΩ or 50Ω, Figure 1
R = 2ꢄΩ or 50Ω, Figure 1
0.2
3
k
k
OD
Common-Mode Output koltage
k
OC
Change in Magnitude of
Common-Mode Output koltage
for Complementary Output
States
|Δk
R = 2ꢄΩ or 50Ω, Figure 1
0.2
k
OC
www.maximintegrated.com
Maxim Integrated | 3
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
ElteoPiealVChaPaeotPisoiesV(ernoinutꢂ)
(k
= +3k to +5.5k, C1–C4 = 0.1µF when tested at +3.3k 10ꢃ; C1 = 0.04ꢄµF and C2, C3, C4 = 0.33µF when tested at +5k 10ꢃ;
CC
T
= T
to T
, unless otherwise noted. Typical values are at k = +3.3k and T = +25°C.) (Note 2)
MAX CC A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
or k = -ꢄk to +12k
MIN
TYP
MAX
UNITS
Output Short-Circuit Current
Output Leaꢀage Current
I
k
k
250
mA
SC
Y
Y
Z
MAX3160E
MAX3161E
MAX3162E
125
25
or k = -ꢄk or +12k,
Z
DE485 = GND or SHDN =
GND
µA
IO
25
RS-232 TRANSMITTER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps, one transmitter switching)
Maximum Data Rate
Transmitter Sꢀew
R = 3ꢀΩ, C = 1000pF
250
ꢀbps
ns
L
L
t
R = 3ꢀΩ, C = 150pF, Figure 6
25
TSKEW
L
L
C = 150pF
L
to 1000pF
k
= +3.3k, T = +25°C,
A
CC
6
4
30
30
R = 3ꢀΩ to ꢄꢀΩ,
measured from +3.0k to
-3.0k or -3.0k to +3.0k
L
Transition-Region Slew Rate
k/µs
C = 150pF
L
to 2500pF
RS-232 TRANSMITTER TIMING CHARACTERISTICS (FAST MODE, FAST = V , 1Mbps, one transmitter switching)
CC
k
= +3k to +4.5k, R = 3ꢀΩ, C = 250pF
1
CC
L
L
Maximum Data Rate
Transmitter Sꢀew
Mbps
ns
k
= +4.5k to +5.5k, R = 3ꢀΩ,
CC
L
1
C = 1000pF
L
t
R = 3ꢀΩ, C = 150pF, Figure 6
10
TSKEW
L
L
k
= +3.3k, T = +25°C, R
A L
CC
MAX3160E
13
24
150
150
= 3ꢀΩ to ꢄꢀΩ, C = 150pF to
1000pF, measured from +3.0k
to -3.0k or -3.0k to +3.0k
L
Transition-Region Slew Rate
k/µs
MAX3161E
MAX3162E
RS-232 RECEIVER TIMING CHARACTERISTICS
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Sꢀew
t
,t
R_IN to R_OUT, C = 15pF, Figure 5
0.15
200
200
100
µs
ns
ns
ns
PꢁL PLꢁ
L
t
t
,t
C = 50pF, Figures 2, 10, MAX3162E
L
RZL RZꢁ
,t
C = 15pF, Figures 2, 10, MAX3162E
L
RLZ RꢁZ
t
C = 50pF, Figure 5
L
RSKEW
RS-485/RS-422 DRIVER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps)
Differential Driver Propagation
Delay
t
t
,
DPꢁL
DPLꢁ
R
DIFF
R
DIFF
R
DIFF
= 54Ω, C = 50pF, Figures 3, ꢄ
200
200
400
400
800
800
200
ns
ns
ns
L
Differential Driver Rise and Fall
Time
t
DR,
= 54Ω, C = 50pF, Figures 3, ꢄ
L
t
DF
Differential Driver Propagation
Delay Sꢀew
t
= 54Ω, C = 50pF, Figures 3, ꢄ
L
DSKEW
Driver Output Enable Time
Driver Output Disable Time
t
t
, t
C = 50pF, Figures 4, 8
400
200
900
400
ns
ns
DZꢁ DZL
L
, t
C = 50pF, Figures 4, 8
L
DLZ DꢁZ
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Maxim Integrated | 4
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
ElteoPiealVChaPaeotPisoiesV(ernoinutꢂ)
(k
= +3k to +5.5k, C1–C4 = 0.1µF when tested at +3.3k 10ꢃ; C1 = 0.04ꢄµF and C2, C3, C4 = 0.33µF when tested at +5k 10ꢃ;
CC
T
= T
to T
, unless otherwise noted. Typical values are at k = +3.3k and T = +25°C.) (Note 2)
MAX CC A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RS-485/RS-422 DRIVER TIMING CHARACTERISTICS FAST MODE, FAST = V , 10Mbps)
CC
Differential Driver Propagation
Delay
t
DPꢁL,
R
DIFF
R
DIFF
R
DIFF
= 54Ω, C = 50pF, Figures 3, ꢄ
60
10
120
25
ns
ns
ns
L
t
DPLꢁ
Differential Driver Rise and Fall
Times
t
, t
DR DF
= 54Ω, C = 50pF, Figures 3, ꢄ
L
Differential Driver Propagation
Delay Sꢀew
t
= 54Ω, C = 50pF, Figures 3, ꢄ
10
DSKEW
L
Driver Output Enable Time
Driver Output Disable Time
t
t
,t
C = 50pF, Figures 4, 8
400
200
900
400
ns
ns
DZꢁ DZL
L
,t
C = 50pF, Figures 4, 8
L
DꢁZ DLZ
RS-485/RS-422 RECEIVER TIMING CHARACTERISTICS
t
t
,
RPLꢁ
Receiver Propagation Delay
C = 15pF, Figures 9, 11
80
1
150
10
ns
ns
L
RPꢁL
Receiver Propagation Delay
Sꢀew
t
C = 15pF, Figures 9, 11
L
RSKEW
Receiver Output Enable Time
t
t
, t
MAX3162E, C = 50pF, Figures 2, 10
100
100
ns
ns
RZL RZꢁ
L
Receiver Output Disable Time
ESD PROTECTION
, t
MAX3162E, C = 15pF, Figures 2, 10
L
RLZ RꢁZ
R_IN, T_OUT, A, ꢂ, Y, Z
ꢁuman ꢂody Model
15
ꢀk
Note 2: All currents into the device are positive. All currents out of the device are negative.
Note 3: Applies to A, ꢂ for MAX3162E and MAX3160E/MAX3161E with ꢁDPLX = GND, or Y, Z for MAX3160E/MAX3161E with
ꢁDPLX = k
CC.
TypiealVOptPaoingVChaPaeotPisoies
, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3ꢀΩ to
ꢂYPASS
(k
= +3.3k, 250ꢀbps data rate, C
CC
ground, T = +25°C, unless otherwise noted.)
A
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE (FAST = GND)
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = GND)
10.00
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = V
)
CC
18
16
14
12
10
8
10.00
7.50
DATA RATE = 1Mbps
7.50
5.00
RISING
5.00
2.50
2.50
FALLING
0
0
-2.50
-5.00
-7.50
-10.00
-2.50
-5.00
-7.50
-10.00
6
4
2
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
0
500
1000
1500
2000
2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
www.maximintegrated.com
Maxim Integrated | 5
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
TypiealVOptPaoingVChaPaeotPisoiesV(ernoinutꢂ)
, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3ꢀΩ to
ꢂYPASS
(k
= +3.3k, 250ꢀbps data rate, C
CC
ground, T = +25°C, unless otherwise noted.)
A
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE WHEN
TRANSMITTING DATA (RS-232 MODE)
MAX3160E/MAX3161E
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE (FAST = V
)
CC
60
50
40
30
20
10
0
3.0
2.5
2.0
1.5
1.0
0.5
0
110
100
90
DATA RATE =
1Mbps
RS-485 MODE
RS-232 MODE
RISING
80
70
DATA RATE = 250kbps
60
50
FALLING
40
30
20
10
0
DATA RATE = 20kbps
0
1000
2000
3000
4000
5000
-40
-15
10
35
60
85
0
400
800
1200
1600
2000
LOAD CAPACITANCE (pF)
TEMPERATURE (°C)
LOAD CAPACITANCE (pF)
RS-485/RS-422 OUTPUT CURRENT
vs. DRIVER-OUTPUT LOW VOLTAGE
SHUTDOWN CURRENT
vs. TEMPERATURE
RS-485/RS-422 OUTPUT CURRENT
vs. DRIVER-OUTPUT LOW VOLTAGE
140
120
100
80
250
200
150
100
50
140
120
100
80
60
60
40
40
20
20
0
0
0
-7
-5
-3
-1
1
3
5
-40
-15
10
35
60
85
0
2
4
6
8
10
12
OUTPUT LOW VOLTAGE (V)
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
RECEIVER OUTPUT CURRENT vs. RECEIVER-
OUTPUT LOW VOLTAGE
30
RS-485/RS-422 DRIVER OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
RS-485/RS-422 DRIVER DIFFERENTIAL
OUTPUT vs. TEMPERATURE
100
90
80
70
60
50
40
30
20
10
0
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
R
= 100Ω
DIFF
FIGURE 1
25
20
15
10
5
0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT LOW VOLTAGE (V)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LOW VOLTAGE (V)
-40
-15
10
35
60
85
TEMPERATURE (°C)
www.maximintegrated.com
Maxim Integrated | 6
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
TypiealVOptPaoingVChaPaeotPisoiesV(ernoinutꢂ)
, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3ꢀΩ to
ꢂYPASS
(k
= +3.3k, 250ꢀbps data rate, C
CC
ground, T = +25°C, unless otherwise noted.)
A
RS-485/RS-422 DRIVER PROPAGATION DELAY
vs. TEMPERATURE (FAST = V
RS-485/RS-422 RECEIVER PROPAGATION
DELAY vs. TEMPERATURE
RECEIVER OUTPUT CURRENT
vs. RECEIVER-OUTPUT HIGH VOLTAGE
)
CC
100
90
80
70
60
50
40
30
20
10
0
50
45
40
35
30
25
20
14
C = 50pF
L
R
DIFF
= 54Ω
RISING
12
10
8
DATA RATE = 10Mbps
FALLING
RISING
FALLING
6
4
2
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT-HIGH VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
RS-485/RS-422 DRIVER PROPAGATION
RS-485/RS-422 DRIVER PROPAGATION
(FAST = V , 10Mbps)
RS-485/RS-422 DRIVER PROPAGATION DELAY
vs. TEMPERATURE (FAST = GND)
(FAST = GND, 250kbps)
CC
MAX3160E toc18
MAX3160E toc17
400
C = 50pF
L
C = 50pF
L
R
DIFF
= 54Ω
R
DIFF
= 54Ω
DI
2V/div
DI
2V/div
350
300
250
200
150
100
RISING
FALLING
V
- V
Z
V
- V
Y
Y
Z
2V/div
2V/div
C = 50pF
L
R
= 54Ω
DIFF
DATA RATE = 250kbps
1.0μs/div
20ns/div
-40
-15
10
35
60
85
TEMPERATURE (°C)
RS-485/RS-422 RECEIVER PROPAGATION
RS-485/RS-422 RECEIVER PROPAGATION
I-V OUTPUT IMPEDANCE CURVE
IN RS-232 SHUTDOWN MODE
(FAST = V , 5Mbps)
(FAST = V , 5Mbps)
CC
CC
MAX3160E toc20
MAX3160E toc21
400
200
C = 15pF
L
C = 50pF
L
R
DIFF
= 54Ω
V
- V
Z
Y
2V/div
DE485
2V/div
0
-200
-400
-600
-800
-1000
V
- V
Z
Y
2V/div
RO
2V/div
4ns/div
100ns/div
-20 -15 -10 -5
0
5
10 15 20
OUTPUT VOLTAGE (V)
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Maxim Integrated | 7
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
TypiealVOptPaoingVChaPaeotPisoiesV(ernoinutꢂ)
, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3ꢀΩ to
ꢂYPASS
(k
= +3.3k, 250ꢀbps data rate, C
CC
ground, T = +25°C, unless otherwise noted.)
A
MAX3160E
RS-232 TRANSMITTER PROPAGATION
MAX3160E
RS-232 TRANSMITTER PROPAGATION
(FAST = GND, 250kbps)
(FAST = V , 250kbps)
CC
MAX3160E toc22
MAX3160E toc23
C = 1000pF
R = 7kΩ
L
L
C = 150pF
L
R = 7kΩ
L
DI
2V/div
DI
2V/div
T_OUT
5V/div
T_OUT
5V/div
1.0μs/div
1.0μs/div
MAX3161E/MAX3162E
RS-232 TRANSMITTER PROPAGATION
(FAST = V , 250kbps)
MAX3161E/MAX3162E
RS-232 TRANSMITTER PROPAGATION
CC
(FAST = GND, 250kbps)
MAX3160E toc25
MAX3160E toc24
C = 150pF
R = 7kΩ
L
L
C = 1000pF
R = 7kΩ
L
L
DI
2V/div
DI
2V/div
T_OUT
5V/div
T_OUT
5V/div
1.0μs/div
1.0μs/div
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (FAST = GND)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
WITH RS-232 RUNNING (FAST = GND)
10.00
7.50
12
10
8
INPUTS AT V AND GND
CC
2 TRANSMITTERS LOADED WITH 3kΩ
5.00
2.50
0
6
-2.50
-5.00
-7.50
-10.00
4
C = 50pF
L
2
R = 3kΩ
L
1 TRANSMITTER AT 250kbps
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
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Maxim Integrated | 8
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
-inVStsePipoirn
PIN
NAME
FUNCTION
MAX3160E
MAX3161E
MAX3162E
1
2
1
2
3
4
5
1
2
3
4
5
C1+
Positive Terminal of the Positive Flying Capacitor
Positive Supply koltage
k
CC
3
C1-
GND
Negative Terminal of the Positive Flying Capacitor
Ground
4
—
T1OUT
RS-232 Driver Output
Inverting RS-485/RS-422 Driver Output in Full-Duplex Mode
(and Inverting RS-485/RS-422 Receiver Input in ꢁalf-Duplex
Mode)/RS-232 Driver Output
5
—
—
6
—
6
Z(ꢂ)/T1OUT
—
—
Z
Inverting RS-485/RS-422 Driver Output
Inverting RS-485/RS-422 Driver Output in Full-Duplex Mode
(and Inverting RS-485/RS-422 Receiver Input in ꢁalf-Duplex
Mode)
—
Z(ꢂ)
Noninverting RS-485/RS-422 Driver Output in Full-Duplex
Mode (and Noninverting RS-485/RS-422 Receiver Input in
ꢁalf-Duplex Mode)/RS-232 Driver Output
6
—
—
ꢄ
—
ꢄ
Y(A)/T2OUT
—
—
Y
Noninverting RS-485/RS-422 Driver Output
Noninverting RS-485/RS-422 Driver Output in Full-Duplex
Mode (and Noninverting RS-485/RS-422 Receiver Input in
ꢁalf-Duplex Mode)
—
Y(A)
ꢄ
—
8
9
8
9
8
R1OUT
T2OUT
RS-232 Receiver Output
RS-232 Driver Output
10
—
RO/R2OUT
RS-485/RS-422 Receiver Output/RS-232 Receiver Output
Active-Low Shutdown-Control Input. Drive SHDN low to shut
down transmitters and charge pump.
9
11
—
13
10
SHDN
—
R2OUT
RS-232 Driver Output
Transmitter Speed-Select Input. Select slew-rate limiting for
RS-232 and RS-485/RS-422. Slew-rate limits with a logic-level
low.
10
—
11
12
—
13
14
11
—
FAST
RO
RS-485/RS-422 Receiver Output
Pin-Selectable Mode Functionality Input. Operates as
RS-485/RS-422 with a logic-level high; operates as RS-232
with a logic-level low.
RS-485/RS- 232
RS-485/RS-422 Receiver Enable Input. Logic-level low enables
RS-485/RS-422 receivers.
—
—
12
—
RE485
Pin-Selectable Mode Functionality Input. Operates in full-
duplex mode when low; operates in half-duplex mode when
high.
12
14
ꢁDPLX
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Maxim Integrated | 9
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
-inVStsePipoirnV(ernoinutꢂ)
PIN
NAME
FUNCTION
MAX3160E
MAX3161E
MAX3162E
Noninverting RS-485/RS-422 Receiver Input/RS-232 Receiver
Input
13
—
—
A/R2IN
ꢂ/R1IN
RE232
14
—
—
—
—
Inverting RS-485/RS-422 Receiver Input/RS-232 Receiver Input
RS-232 Receiver Enable. Logic-level low enables
RS-232 receivers.
15
—
15
—
—
16
—
1ꢄ
—
18
19
20
—
—
—
—
15
19
—
16
20
1ꢄ
21
18
22
23
24
—
—
—
—
1ꢄ
—
16
18
—
19
25
20
26
2ꢄ
28
21
22
23
24
A
DE485/T2IN
TE232
ꢂ
Noninverting RS-485/RS-422 Receiver Input
RS-485/RS-422 Driver Enable/RS-232 Driver Input
RS-232 Transmitter Output Enable
Inverting RS-485/RS-422 Receiver Input
RS-485/RS-422 Driver Input/RS-232 Driver Input
RS-232 Receiver Input
DI/T1IN
R2IN
k-
Negative Charge-Pump Rail
R1IN
C2-
RS-232 Receiver Input
Negative Terminal of the Negative Flying Capacitor
Positive Terminal of the Negative Flying Capacitor
Positive Charge-Pump Rail
C2+
k+
T2IN
DE485
DI
RS-232 Driver Input
RS-485/RS-422 Driver Enable Input
RS-485/RS-422 Driver Input
T1IN
RS-232 Driver Input
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Maxim Integrated | 10
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
MAX3160EVFuneoirnalVSiagPam
RS-232 MODE
RS-485 MODE
V
V
CC
CC
C1+
V+
C2+
C2-
V-
C1+
V+
1
2
20
19
18
17
16
15
14
13
12
11
1
20
C2
C3
C1
C
C1
V
V
CC
C2+
C2-
CC
2
3
19
18
17
CHARGE
PUMP
CHARGE
PUMP
C3
C2
C1-
C1-
3
C
BYPASS
BYPASS
GND
V-
GND
4
5
6
4
C4
C4
Z
T1
16
15
5
RS-485
OUTPUTS
LOGIC
INPUTS
RS-232
OUTPUTS
LOGIC
INPUTS
D
Y
T2
R1
R2
6
DE485
B
A
7
14
7
LOGIC
OUTPUTS
RS-232
INPUTS
RS-485
INPUTS
R0
LOGIC
OUTPUT
8
8
9
R
13
12
11
LOGIC
INPUT
9
SHDN
FAST
HDPLX
SHDN
FAST
MAX3160E
HDPLX
MAX3160E
10
RS-485/RS-232
10
RS-485/RS-232
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Maxim Integrated | 11
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
MAX3161EVFuneoirnalVSiagPam
RS-232 MODE
RS-485 MODE
V
V
CC
CC
C1+
V+
C2+
C2-
V-
C1+
V+
1
1
2
24
23
22
21
20
19
18
17
16
15
14
24
C3
C4
C3
C1
C1
V
V
CC
CC
C2+
C2-
2
3
4
23
22
21
CHARGE
PUMP
CHARGE
PUMP
C2
C2
C1-
C1-
3
C
C
BYPASS
BYPASS
GND
V-
GND
4
C4
T1
5
6
20
19
RS-232
OUTPUT
5
LOGIC
INPUTS
LOGIC
INPUTS
Z
6
RS-485
OUTPUTS
D
Y
7
8
18
17
7
DE485
RS-232
INPUTS
T2
R1
R2
RS-232
OUTPUT
8
B
A
9
16
9
RS-485
INPUTS
LOGIC
OUTPUTS
R0
LOGIC
OUTPUT
10
10
R
15
14
LOGIC
INPUT
11 SHDN
12
11 SHDN
12 FAST
HDPLX
MAX3161E
HDPLX
MAX3161E
FAST
RS-485/RS-232 13
RS-485/RS-232 13
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Maxim Integrated | 12
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
MAX3162EVFuneoirnalVSiagPam
TtsoVCiPeuios
Y
R
V
CC
C1+
V+
V
1
28
OD
C3
C1
V
C2+
C2-
CC
V
R
OC
2
3
4
27
26
25
CHARGE
PUMP
C2
C1-
Z
C
BYPASS
GND
V-
Figure 1. RS-485/RS-422 Driver DC Test Load
C4
T1
RS-232
5
6
7
24
23
OUTPUT
1kΩ
TEST POINT
RECEIVER
Z
V
CC
OUTPUT
S1
S2
LOGIC
INPUTS
RS-485
OUTPUTS
C
L
D
1k
DE485
T2
Y
22
RS-232
OUTPUT
8
9
211
20
R1
R2
Figure 2. RS-485/RS-422 and RS-232 Receiver Enable/Disable
Timing Test Load
RS-232
INPUTS
LOGIC
OUTPUTS
10
19
B
A
11
12
18
17
3V
RO
RE485
RS-485
INPUTS
R
DE485
LOGIC
INPUT
Y
DI
13 SHDN
14 FAST
16
15
TE232
RE-232
R
V
OD
DIFF
C
L
MAX3162E
LOGIC
INPUTS
Z
Figure 3. RS-485/RS-422 Driver Timing Test Circuit
V
CC
S1
500Ω
OUTPUT
UNDER TEST
C
L
S2
Figure 4. RS-485/RS-422 Driver Enable/Disable Timing Test Load
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Maxim Integrated | 13
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
+3V
+3V
1.5V
0V
1.5V
50%
INPUT
1.5V
1.5V
INPUT
0V
V
CC
V+
OUTPUT
50%
GND
0V
V-
OUTPUT
t
t
PHL
PLH
t
t
PHL
PLH
t
t
- t
t
= | t - t
PLH PHL
|
SKEW = | PLH PHL |
RSKEW
Figure 5. RS-232 Receiver Propagation-Delay Timing
Figure 6. RS-232 Transmitter Propagation-delay Timing
3V
DE485
3V
DI
1.5V
1.5V
1.5V
1.5V
0
0
t
t
DPHL
DPLH
1/2 V
O
t
t
DLZ
DZL
Z
Y, Z
V
2.3V
V
+ 0.5V
- 0.5V
O
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
OL
V
OL
Y
1/2 V
O
V
= V - V
y
DIFF
z
V
O
0
Y, Z
V
DIFF
90%
t
90%
V
2.3V
OH
10%
10%
0
-V
O
t
DR
t
DF
t
t
DHZ
DZH
t
- t
DSKEW = | DPLH DPHL |
Figure 8. RS-485/RS-422 Driver Enable and Disable Times
Figure ꢄ. RS-485/RS-422 Driver Propagation Delays
3V
RE232 OR RE485
1.5V
1.5V
0
V
OH
RO
V
CC
/2
V /2
CC
V
t
OUTPUT
t
RZL
OL
RLZ
V
CC
t
t
RO
1.5V
RPHL
RPLH
V
V
+ 0.5V
- 0.5V
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
OL
A
B
1V
-1V
INPUT
= | t
RO
t
- t
|
1.5V
RSKEW
RPLH RPHL
OH
0
t
t
RHZ
RZH
Figure 9. RS-485/RS-422 Receiver Propagation Delays
Figure 10. MAX3162 RS-485/RS-422 and RS-232 Receiver
Enable and Disable Times
B
V
RO
R
ID
A
C
L
Figure 11. RS-485/RS-422 Receiver Propagation Delays Test
Circuit
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Maxim Integrated | 14
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
MAX3161E
StoailtꢂVStsePipoirn
The MAX3161E is a 2T /2R RS-232 transceiver in
X
X
The MAX3160E/MAX3161E/MAX3162E +3k to +5.5k,
multiprotocol transceivers can be pin-configured in a
number of RS-232 and RS-485/RE-422 interface combi-
nations. These circuit configurations are ideal for the
design of RS-232 to RS-485 converters, multiprotocol
buses, or any application that requires both RS-232 and
RS-485 transceivers. The slew rate of these devices is
on-the-fly pin selectable, allowing reduced EMI data
rates, or up to 10Mbps RS-485 communications. Power
consumption can be reduced to 10nA by using the
shutdown function, but the RS-232 receivers remain
active allowing other devices to query the interface con-
troller. A flow-through pinout and the space-saving
SSOP pacꢀages (available in commercial and extended
temperature ranges) facilitate board layout.
RS-232 mode or a single RS-485/RS-422 transceiver in
RS-485 mode. When in RS-485 mode, the unused RS-
232 transmitter and receiver outputs are disabled. When
in RS-232 mode, the RS-485 transmitter outputs are dis-
abled and the RS-232 receiver inputs are 5ꢀΩ to GND.
The RS-485 receiver inputs are always 1/8-unit load.
Logic lines are shared between the two protocols and are
used for signal inputs and as an RS-485 driver enable.
MAX3162E
The MAX3162E is a 2Tx/2Rx RS-232 transceiver and a
single RS-485/RS-422 transceiver simultaneously. All
drivers, receivers, and transmitters can be enabled or
disabled by pin selection. All outputs are high-imped-
ance when not activated. RS-232 receiver inputs are
5ꢀΩ when enabled, and RS-485 receiver inputs are
1/8-unit load.
StvietVꢁtlteoirn
The MAX3160E/MAX3161E/MAX3162E contain RS-232
transceivers and an RS-485/RS-422 transceiver. The
primary difference between the devices is the multi-
plexing of the I/O ports.
FasoDMrꢂtVOptPaoirn
The FAST control input is used to select the slew-rate
limiting of the RS-232 transmitters and the RS-485/
RS-422 drivers. With FAST unasserted, the RS-232
transmitters and the RS-485/RS-422 driver are slew-rate
limited to reduce EMI. RS-232 data rates up to 1Mbps
and RS-485/RS-422 data rates up to 10Mbps are possi-
ble when FAST is asserted. FAST can be changed dur-
ing operation without interrupting data communications.
The MAX3160E has common transmitter outputs and
receiver inputs for its RS-232 and RS-485/RS-422 trans-
ceivers, and common digital I/O ports. The MAX3160E
is optimized for multiprotocol operation on a single
interface bus and comes in a 20-pin SSOP pacꢀage.
The MAX3161E has separate transmitter outputs and
receiver inputs for its RS-232 and RS-485/RS-422 trans-
ceivers, and common digital I/O ports. The MAX3161E is
optimized for multiplexing a single UART across two inter-
face buses and is available in a 24-pin SSOP pacꢀage.
HalfDSupltxVRꢁD48ꢀ/RꢁD422VOptPaoirn
Asserting ꢁDPLX places the MAX3160E/MAX3161E in
half-duplex mode. The RS-485 receiver inputs are inter-
nally connected to the driver outputs. To receive
RS-485 data, disable the RS-485 outputs by driving
DE485 low. ꢁDPLX has no affect on RS-232 operation.
The MAX3162E has separate transmitter outputs and
receiver inputs for its RS-232 and RS-485/RS-422 trans-
ceivers, and separate digital I/O ports. The MAX3162E
is optimized for protocol translation between two inter-
face buses and comes in a 28-pin SSOP pacꢀage.
LrwD-rwtPVꢁhuoꢂrwn
The MAX3160E/MAX3161E/MAX3162E have an active-
low shutdown control input, SHDN. When SHDN is dri-
ven low, the charge pump and transmitters are shut
down and supply current is reduced to 10nA. The
RS-232 receiver outputs remain active if in RS-232
mode. The charge-pump capacitors must be
recharged when coming out of shutdown before resum-
ing operation in either RS-232 or RS-485/RS-422 mode
(Figure 12).
See Tables 1–12, the Functional Diagrams, and the fol-
lowing descriptions for details on each device.
MAX3160E
The MAX3160E is a 2T /2R RS-232 transceiver in
X
X
RS-232 mode, capable of RS-232-compliant communi-
cation. Assertion of RS-485/RS-232 converts the device
to a single RS-485 transceiver by multiplexing the RS-
232 I/O ports to an RS-485 driver and receiver pair. The
logic inputs now control the driver input and the driver
enable. One logic output carries the RS-485 receiver out-
put, and the other is tri-stated. The receiver input imped-
ance is dependent on the device mode and is 1/4-unit
load for RS-485 operation and 5ꢀΩ for RS-232 operation.
SualVChaPgtD-umpVkrloagtVCrnvtPotP
The MAX3160E/MAX3161E/MAX3162E’s internal power
supply consists of a regulated dual charge pump that
provides output voltages of +5.5k (doubling charge
pump), and -5.5k (inverting charge pump), for input
voltages (k ) over the +3.0k to +5.5k range. The
CC
charge pumps operate in a discontinuous mode. If the
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Maxim Integrated | 15
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
magnitude of either output voltage is less than +5.5k,
the charge pumps are enabled. If the magnitude of
both output voltages exceeds +5.5k, the charge
pumps are disabled. Each charge pump requires a fly-
ing capacitor (C1, C2) and a reservoir capacitor (C3,
C4) to generate the k+ and k- supplies (see the
Functional Diagrams).
The receivers convert RS-232 signals to CMOS-logic out-
put levels. All receivers have inverting outputs that
remain active in shutdown. The MAX3160E/MAX3161E/
MAX3162E permit their receiver inputs to be driven to
25k. Floating receiver input signals are pulled to
ground through internal 5ꢀΩ resistors, forcing the out-
puts to a logic-high. The MAX3162E has transmitter and
receiver enable pins that allow its outputs to be tri-stated.
RꢁD48ꢀ/RꢁD422VTPansetivtPs
The MAX3160E/MAX3161E/MAX3162E RS-485/RS-422
transceivers feature fail-safe circuitry that guarantees a
logic-high receiver output when the receiver inputs are
open or shorted, or when they are connected to a ter-
minated transmission line with all drivers disabled (see
the Fail-Safe Section). The MAX3160E/MAX3161E/
MAX3162E also feature pin-selectable reduced slew-
rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing
error-free data transmission up to 250ꢀbps The trans-
mitters can operate at speeds up to 10Mbps with the
slew-rate limiting disabled. Drivers are short-circuit cur-
rent limited and thermally limited to protect them
against excessive power dissipation. ꢁalf-duplex com-
munication is enabled by driving ꢁDPLX high
(MAX3160E/MAX3161E.)
1ꢀ5kVEꢁSV-Proteoirn
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against ESD encoun-
tered during handling and assembly. The MAX3160E
/MAX3161E/MAX3162E receiver inputs and transmitter
outputs have extra protection against static electricity
found in normal operation. Maxim’s engineers developed
state-of-the-art structures to protect these pins against
15ꢀk ESD, without damage. After an ESD event, the
MAX3160E/MAX3161E/MAX3162E continue worꢀing
without latchup.
The receiver inputs and transmitter outputs are charac-
terized for 15ꢀk ESD protection using the ꢁuman
ꢂody Model
EꢁSVTtsoVCrnꢂioirns
ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
FailDꢁaft
The MAX3160E/MAX3161E/MAX3162E guarantee a
logic-high RS-485 receiver output when the receiver
inputs are shorted or open, or when they are connected
to a terminated transmission line with all drivers dis-
abled. This is done by having the receiver threshold
between -50mk and -200mk. If the differential receiver
input voltage (A-ꢂ) is greater than or equal to -50mk,
RO is logic-high. If A-ꢂ is less than or equal to -200mk,
RO is logic-low. In the case of a terminated bus with all
transmitters disabled, the receiver’s differential input
voltage is pulled to 0 by the termination. This results in
a logic-high with a 50mk minimum noise margin.
HumanVBrꢂyVMrꢂtl
Figure 13a shows the ꢁuman ꢂody Model, and Figure
13b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the device through a
1.5ꢀΩ resistor.
RꢁD232VTPansetivtPs
The MAX3160E/MAX3161E/MAX3162E RS-232 trans-
mitters are inverting-level translators that convert
CMOS-logic levels to 5k EIA/TIA-232-compliant lev-
els. The transmitters are guaranteed at a 250ꢀbps data
rate in slew-rate limited mode (FAST = GND) with
worst-case loads of 3ꢀΩ in parallel with 1000pF. Data
rates up to 1Mbps can be achieved by asserting FAST.
When powered down or in shutdown, the MAX3160E/
MAX3161E/MAX3162E outputs are high impedance
and can be driven to 13.2k. The transmitter inputs do
not have pullup resistors. Connect unused inputs to
ground or k
.
CC
www.maximintegrated.com
Maxim Integrated | 16
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
R
R
1MΩ
D
C
SHDN
5V/div
1.5kΩ
T1OUT
2V/div
DISCHARGE
RESISTANCE
CHARGE-CURRENT
LIMIT RESISTOR
GND
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
100pF
STORAGE
CAPACITOR
s
T2OUT
2V/div
SOURCE
40μs/div
Figure 13a. ꢁuman ꢂody ESD Test Model
Figure 12. RS-232 Transmitter Outputs when Exiting Shutdown
MaehintVMrꢂtl
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing and
assembly. Of course, all pins (not just RS-485 inputs)
require this protection during manufacturing. Therefore,
the Machine Model is less relevant to the I/O ports than
are the ꢁuman ꢂody Model and IEC 1000-4-2.
I 100%
P
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
AMPERES
36.8%
10%
0
ApplieaoirnsVInfrPmaoirn
CapaeiorPVꢁtlteoirn
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
The capacitor type used for C1–C4 is not critical for
proper operation; polarized or nonpolarized capacitors
can be used. Ceramic chip capacitors with an XꢄR
dielectric provide the best combination of performance,
cost, and size. The charge pump requires 0.1µF
capacitors for 3.3k operation. For other supply volt-
ages, see Table 13 for required capacitor values. Do
not use values smaller than those listed in Table 13.
Increasing the capacitor values reduces ripple on the
transmitter outputs and slightly reduces power con-
sumption. C2, C3, and C4 can be changed without
changing C1’s value. However, do not increase C1
without also increasing the values of C2, C3, C4,
Figure 13b. ꢁuman ꢂody Model Current Waveform
usually rises at low temperatures, influences the
amount of ripple on k+ and k-.
-rwtPDꢁupplyVSterupling
In applications that are sensitive to power-supply noise,
decouple k
to ground with a capacitor of the same
CC
value as reservoir capacitors C2, C3, and C4. Connect
the bypass capacitor as close to the IC as possible.
and C
to maintain the proper ratios to the
BYPASS
other capacitors.
When using the minimum required capacitor values,
maꢀe sure the capacitance value does not degrade
excessively with temperature or voltage. This is typical
of Y5k and Z5U dielectric ceramic capacitors. If in
doubt, use capacitors with a larger nominal value. The
capacitor’s equivalent series resistance (ESR), which
www.maximintegrated.com
Maxim Integrated | 17
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
RꢁD232VTPansmiootPVOuopuos
V
CC
C
BYPASS
whtnVExioingVꢁhuoꢂrwn
Figure 12 shows two transmitter outputs when exiting
shutdown mode. As they become active, the two trans-
mitter outputs are shown going to opposite RS-232 lev-
els (one transmitter input is high, the other is low). Each
transmitter is loaded with 3ꢀΩ in parallel with 1000pF.
The transmitter outputs display no ringing or undesir-
able transients as they come out of shutdown. Note that
the transmitters are enabled only when k- exceeds
approximately -3k.
V
CC
C1+
V+
V-
C1
C2
C3
C4
C1-
C2+
MAX3160E
MAX3161E
MAX3162E
C2-
T_ OUT
R_ IN
T_ IN
HighVSaoaVRaots
The MAX3160E/MAX3161E/MAX3162E maintain the
RS-232 5k required minimum transmitter output voltage
even at high data rates. Figure 14 shows a transmitter
loopbacꢀ test circuit. Figure 15 shows a loopbacꢀ test
result at 250ꢀbps, and Figure 16 shows the same test at
1Mbps. Figure 15 demonstrates a single slew-rate limit-
ed transmitter driven at 250ꢀbps (FAST = GND) into an
RS-232 load in parallel with 1000pF. Figure 1ꢄ shows a
single transmitter driven at 1Mbps (FAST asserted),
loaded with an RS-232 receiver in parallel with 1000pF.
These transceivers maintain the RS-232 5k minimum
transmitter output voltage at data rates up to 1Mbps.
R_ OUT
SHDN
1000pF
5k
V
CC
GND
Figure 14. Loopbacꢀ Test Circuit
The MAX3160E/MAX3161E/MAX3162E inputs are pro-
tected to RS-232 levels of 25k for the receiver inputs
and 13k for the transmitter/driver outputs. This pro-
vides additional protection for the RS-485 transceivers
against ground differential or faults due to miswiring.
2ꢀ6VTPansetivtPsVrnVohtVBus
The standard RS-485 receiver input impedance is 12ꢀΩ
(one-unit load), and the standard driver can drive up to
32-unit loads. The MAX3160E has a 1/4-unit load
receiver input impedance (48ꢀΩ), allowing up to 128
transceivers to be connected in parallel on one com-
munication line. The MAX3161E/MAX3162E have a 1/8-
unit load receiver input impedance (96ꢀΩ), allowing up
to 256 transceivers to be connected in parallel on one
communication line. Any combination of these devices
and/or other RS-485 transceivers with a total of 32-unit
loads or fewer can be connected to the line.
RꢁD48ꢀ/RꢁD422VRtꢂuetꢂV
EMIVanꢂVRtflteoirns
The MAX3160E/MAX3161E/MAX3162E can be config-
ured for slew-rate limiting by pulling FAST low. This mini-
mizes EMI and reduces reflections caused by improperly
terminated cables. Operation in slew-rate limited mode
reduces the amplitudes of high-frequency harmonics.
RꢁD48ꢀ/RꢁD422VLintVLtngohVvsꢃVSaoaVLtngoh
The RS-485/RS-422 standard covers line lengths up to
4000ft. For line lengths greater than 4000ft, use the
repeater application shown in Figure 1ꢄ.
RꢁD48ꢀ/RꢁD422V
SPivtPVOuopuoV-Proteoirn
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldbacꢀ current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
the Typical Operating Characteristics). The second, a
thermal shutdown circuit, forces the driver outputs into
a high-impedance state if the die temperature becomes
excessive, typically over +150°C.
RꢁD232/RꢁD48ꢀV-ProrerlVTPanslaorP
Figure 18 shows the MAX3162E configured as an
RS-232/RS-485 protocol translator. The direction of
translation is controlled through the RTS signal (R1IN).
The single-ended RS-232 receiver input signal is trans-
lated to a differential RS-485 transmitter output.
Similarly, a differential RS-485 receiver input signal is
translated to a single-ended RS-232 transmitter output.
RS-232 data received on R
is transmitted as an RS-
485 signal on Z and Y. RS-485 signals received on A
and ꢂ are transmitted as an RS-232 signal on T1
2IN
-ProteoirnVAgainsoVWiPingVFaulos
EIA/TIA-485 standards require a common input voltage
range of -ꢄk to +12k to prevent damage to the device.
.
OUT
www.maximintegrated.com
Maxim Integrated | 18
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
T
T
T
T
IN
IN
OUT
OUT
5V/div
5V/div
R
R
OUT
OUT
1μs/div
200ns/div
Figure 16. MAX3161E/MAX3162E RS-232 Loopbacꢀ Test Result
at 1Mbps, FAST = ꢁigh
Figure 15. MAX3161E/MAX3162E RS-232 Loopbacꢀ Test Result
at 250ꢀbps, FAST = Low
MuloipProrerlVBus
MuloipProrerlVBusVMuloipltxtP
The Typical Operating Circuit shows a standard appli-
cation for the MAX3160E. The MAX3160E’s outputs are
multiplexed between RS-232 and RS-485 protocols by
a microprocessor (µP). The µP also directs the shut-
down functions, enable lines, and the duplex of the
MAX3160E. Data is transmitted to the MAX3100 UART
through an SPI™ port. The UART asynchronously
transfers data through the MAX3160E to the pin-select-
ed RS-232 or RS-485 protocal. See Table 14 for com-
monly used cable connections.
The Typical Application Circuit shows the MAX3161E
configured as a multiprotocol bus multiplexer. The
MAX3161E separates the RS-232 and RS-485 lines, but
shares the logic pins between modes. This application
allows the µP to monitor a point-to-point RS-232 bus, and
a multidrop RS-485 interface. The MAX3100 UART asyn-
chronously transfers data through the MAX3161E to the
pin-selected RS-232 or RS-485 protocol.
SPI is a registered trademarꢀ of Motorola, Inc.
www.maximintegrated.com
Maxim Integrated | 19
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
3.3V
MAX3160E
MAX3161E
MAX3162E
C
BYPASS
100nF
A
B
120Ω
120Ω
RO
RE485
R
DATA IN
2
27
26
V
CC
1
3
C2+
C2-
C1+
C1-
C2
100nF
C1
100nF
DE485
MAX3162E
Z
13
5
DI
SHDN
D
DATA OUT
Y
24
RCV
T1OUT
T1IN
10
23
11
9
R2OUT
DI
RO
R1OUT
12
22
RE485
DE485
19
20
TX
R2IN
R1IN
NOTE: RE485 ON MAX3162E ONLY
17
RTS
A
18
6
15
16
14
28
Figure 1ꢄ. RS-485 Line Repeater
RE232
TE232
B
Z
7
Y
FAST
V+
25
V-
GND
C3
100nF
C4
100nF
Figure 18. Protocol Translator
www.maximintegrated.com
Maxim Integrated | 20
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
RꢁD232VTPansmiootPsVTPuohVTablts
TabltV1ꢃVMAX3160E
RꢁD232VRtetivtPsVTPuohVTablts
TabltV4ꢃVMAX3160E
INPUTS
OUTPUTS
INPUTS
OUTPUTS
DI/T1IN,
DE485/T2IN
Z(B)/T1OUT,
Y(A)/T2OUT
RS-485/
RS-232
B/R1IN,
A/R2IN
R1OUT,
RO/R2OUT
RS-485/
RS-232
SHDN
SHDN
0
1
1
1
X
0
0
1
X
0
1
X
1/8-unit load
X
X
X
0
0
0
0
1
0
1
1
1
0
Inputs open
RS-485 mode
R1OUT
ꢁigh-impedance,
X
1
X
RO/R2OUT in
RS-485 mode
TabltV2ꢃVMAX3161E
INPUTS
OUTPUTS
DI/T1IN,
DE485/T2IN
TabltVꢀꢃVMAX3161E
RS-485/
SHDN
T1OUT, T2OUT
RS-232
INPUTS
OUTPUTS
0
1
1
1
X
0
0
1
X
0
1
X
ꢁigh-impedance
R1OUT,
RO/R2OUT
RS-485/
RS-232
SHDN
R1IN, R2IN
1
0
X
X
X
0
0
0
0
1
0
1
ꢁigh-impedance
1
Inputs open
R1OUT
ꢁigh-impedance,
TabltV3ꢃVMAX3162E
X
1
X
INPUTS
OUTPUTS
T1OUT, T2OUT
ꢁigh-impedance
ꢁigh-impedance
1
RO/R2OUT in
RS-485 mode
SHDN
TE232
T1IN,T2IN
0
X
1
X
0
1
X
X
0
TabltV6ꢃVMAX3162E
INPUTS
OUTPUTS
1
1
1
0
RE232
SHDN
R1IN, R2IN
R1OUT, R2OUT
X
X
X
X
1
0
0
0
X
ꢁigh-impedance
0
1
0
1
1
Inputs open
www.maximintegrated.com
Maxim Integrated | 21
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
RꢁD48ꢀ/RꢁD422VSPivtPsVTPuohVTablts
TabltV7ꢃVMAX3160E
INPUTS
OUTPUTS
RS-232
RS-485/
SHDN
DE485/T2IN
DI/T1IN
Z(B)/T1OUT
Y(A)/T2OUT
0
1
1
1
X
X
X
0
1
1
X
X
X
0
1
X
1/8-unit load
1/8-unit load
1
1
1
0
1/8-unit load
1/8-unit load
1
0
0
1
RS-232 mode
TabltV8ꢃVMAX3161E
INPUTS
RS-232
OUTPUTS
RS-485/
SHDN
DE485/T2IN
DI/T1IN
Z(B)
1/8-unit load
1/8-unit load
1/8-unit load
1
Y(A)
1/8-unit load
1/8-unit load
1/8-unit load
0
0
X
X
1
1
X
X
X
0
1
1
X
X
X
0
1
0
X
1
1
0
1
TabltV9ꢃVMAX3162E
INPUTS
OUTPUTS
SHDN
DE485
DI
X
X
0
Z
Y
0
X
1
1
X
0
1
1
ꢁigh-impedance
ꢁigh-impedance
ꢁigh-impedance
ꢁigh-impedance
1
0
0
1
1
RꢁD48ꢀ/RꢁD422VRtetivtPsVTPuohVTablts
TabltV10ꢃVMAX3160E
INPUTS
OUTPUT
RS-232
RS-485/
SHDN
HDPLX
(A - B)*
(Y - Z)*
RO/R2OUT
1
0
1
1
1
1
1
1
X
X
0
0
0
1
1
1
X
X
X
ꢁigh-impedance up to k
CC
1
1
1
1
1
1
0
≥-50mk
X
1
≤-200mk
X
X
0
Floating
1
X
X
X
X
≥-50mk
≤-200mk
Floating
X
1
0
1
RS-232 mode
*Y and Z correspond to pins Y(A)/T2OUT and Z(ꢂ)/T1OUT. A and ꢂ correspond to pins A/R2IN and ꢂ/R1IN.
www.maximintegrated.com
Maxim Integrated | 22
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
RꢁD48ꢀ/RꢁD422VRtetivtPsVTPuohVTabltsV(ernoinutꢂ)
TabltV11ꢃVMAX3161E
INPUTS
OUTPUT
RS-485/RS-232
SHDN
HDPLX
A - B
Y(A) - Z(B)
RO/R2OUT
1
1
1
1
1
1
1
0
0
1
1
1
1
1
1
X
X
0
0
0
1
1
1
X
X
X
ꢁigh-impedance up to k
CC
≥-50mk
X
1
≤-200mk
X
X
0
Floating
1
X
X
X
X
≥-50mk
≤-200mk
Floating
X
1
0
1
RS-232 mode
TabltV13ꢃVRtquiPtꢂVMinimum
CapaeioanetVkaluts
TabltV12ꢃVMAX3162E
INPUTS
OUTPUT
RE485
SHDN
A - B
X
RO
SUPPLY
C2, C3, C4,
C1 (µF)
0
X
1
1
1
X
1
0
0
0
ꢁigh-impedance
VOLTAGE (V)
C
(µF)
BYPASS
X
ꢁigh-impedance
+3.0 to +3.6
+4.5 to +5.5
+3.0 to +5.5
0.1
0.04ꢄ
0.1
0.1
≥-50mk
≤-200mk
Inputs
1
0
1
0.33
0.4ꢄ
www.maximintegrated.com
Maxim Integrated | 23
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
TabltV14ꢃVCabltVCrnnteoirnsVCrmmrnlyVUstꢂVfrPVEIA/TIAD232VanꢂVkꢃ24
AsynehPrnrusVInotPfaets
MAX3160E
MAX3161E
MAX3162E
PIN NUMBER
EIA/TIA-232
STANDARD
CONNECTOR
PIN
FUNCTION
(AS SEEN BY DTE)
EQUIVALENT
MAX3160E
MAX3161E
MAX3162E
DCD
RD
1
2
3
4
5
6
ꢄ
8
—
R2IN
T1OUT
—
—
13
5
—
1ꢄ
5
—
19
5
Data carrier detect
Received data
TD
Transmitted data
DTR
SG
—
4
—
4
—
4
Data terminal ready
Signal ground
GND
—
DSR
RTS
CTS
—
6
—
8
—
8
Data set ready
T2OUT
R1IN
Request to send (= DTE ready)
Clear to send (= DCE ready)
14
18
20
RI
9
—
—
—
—
Ring indicator
TypiealVApplieaoirnVCiPeuio
+3.3V
2
14
DB9
V
HDPLX
CC
RS-232
T1OUT
5
TX
13
DI/T1IN
20
10
19
9
MAX3100
UART
RO/R2OUT
R2IN
17
RX
12
11
DE485/T2IN
RTS
CTS
MAX3161E
T2OUT
8
R1OUT
R1IN
18
10
1
RJ45
RS-485
Y(A)
7
SPI
Z(B)
RS-485/
RS-232
6
GND
FAST
12
SHDN
4
13
11
µP
RS-485/RS-232
SHDN
MULTIPROTOCOL BUS MULTIPLEXER
www.maximintegrated.com
Maxim Integrated | 24
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
-inVCrnfiguPaoirns
TOP VIEW
C1+
1
2
3
4
5
6
7
8
9
24 V+
C1+
1
2
3
4
5
6
7
8
9
20 V+
C1+
1
2
3
4
5
6
7
8
9
28 V+
V
19 C2+
V
23 C2+
CC
CC
V
27 C2+
26 C2-
25 V-
CC
C1-
GND
22 C2-
C1-
GND
18 C2-
C1-
GND
T1OUT
Z
21 V-
17 V-
MAX3161E
MAX3160E
Z(B)/T1OUT
Y(A)/T2OUT
R1OUT
16 DI/T1IN
15 DE485/T2IN
T1OUT
Z(B)
20 DI/T1IN
19 DE485/T2IN
18 R1IN
17 R2IN
24 T1IN
23 DI
MAX3162E
14
Y(A)
B/R1IN
Y
22 DE485
21 T2IN
20 R1IN
19 R2IN
RO/R2OUT
SHDN
13 A/R2IN
T2OUT
R1OUT
T2OUT
R1OUT
12 HDPLX
16
15
B
A
FAST 10
11 RS-485/RS-232
RO/R2OUT 10
SHDN 11
R2OUT 10
RO 11
14 HDPLX
18
17
B
A
SSOP
FAST 12
13 RS-485/RS-232
RE485 12
SHDN 13
FAST 14
16 TE232
15 RE232
SSOP
SSOP
OPꢂtPingVInfrPmaoirn
ChipVInfrPmaoirn
TRANSISTOR COUNT: 1805
PROCESS: CMOS
PIN-
PACKAGE
CODE
PART
TEMP RANGE PACKAGE
0°C to +ꢄ0°C 20 SSOP
-40°C to +85°C 20 SSOP
0°C to +ꢄ0°C 24 SSOP
MAX3160ECAP
MAX3160EEAP
MAX3161ECAG
A20-2
A20-2
A24-3
A24-3
A28-1
MAX3161EEAG -40°C to +85°C 24 SSOP
-ae5agtVInfrPmaoirn
MAX3162ECAI
0°C to +ꢄ0°C 28 SSOP
-40°C to +85°C 28 SSOP
For the latest pacꢀage outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the pacꢀage code indicates RoꢁS status only.
Pacꢀage drawings may show a different suffix character, but the
drawing pertains to the pacꢀage regardless of RoꢁS status.
MAX3162EEAI
A28-1
ꢁtlteorPVGuiꢂt
RS-485
INPUT
UNIT
FLOW-
THROUGH
PINOUT
DUAL
MODE
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
PART
LOADS
20 SSOP
24 SSOP
28 SSOP
A20-2
A24-3
A28-1
21-0056
21-0056
21-0056
90-0094
90-0010
90-0095
MAX3160E
MAX3161E
MAX3162E
No
No
Yes
No
1/4
1/8
1/8
Yes
Yes
www.maximintegrated.com
Maxim Integrated | 25
15kꢀ ESD-Protected, +3.0ꢀ to
+5.5ꢀ, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
RtvisirnVHisorPy
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
2/05
Initial release
—
1
5/15
Updated Benefits and Features section
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarꢀs of Maxim Integrated Products, Inc.
© 2015 Maxim Integrated Products, Inc. | 26
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