MAX3483AE_V01 [MAXIM]
3.3V-Powered, ±20kV ESD-Protected,20Mbps and Slew-Rate-Limited RS-485/RS-422 Transceivers;
| 型号： | MAX3483AE_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 3.3V-Powered, ±20kV ESD-Protected,20Mbps and Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 文件： | 总19页 (文件大小：999K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
General Description
Benefits and Features
●ꢀ IntegratedꢀProtectionꢀIncreasesꢀRobustnessꢀ
Devices in the MAX3483AE family (MAX3483AE/
MAX3485AE/MAX3488AE/MAX3490AE/MAX3491AE)
are ±20kV ESD-protected RS-485/422 transceivers,
optimized for extended cable runs in noisy environments.
All devices operate from a single 3.3V supply.
ꢀ
•ꢀ HighꢀESDꢀProtection
±20kV HBM ESD per JEDEC JS-001-2012
±15kV Air Gap per IEC 61000-4-2
±8kV Contact ESD per IEC 61000-4-2
ꢀ
ꢀ
•ꢀ Short-CircuitꢀProtectedꢀOutputs
The MAX3483AE and MAX3485AE are half-duplex transceivers.
The MAX3488AE, MAX3490AE, and MAX3491AE are
full-duplex transceivers. The MAX3483AE/85AE have a
1-unit load receiver input impedance, allowing up to 32
transceivers on the bus. The MAX3488AE/90AE/91AE
have a 1/4-unit load receiver input impedance, allowing up
to 128 transceivers on the bus. Each transceiver includes
a fail-safe receiver, ensuring that the receiver output (RO)
is high when inputs are shorted, open, or connected to a
three-state bus.
•ꢀ TrueꢀFail-SafeꢀReceiverꢀPreventsꢀFalseꢀTransitionꢀ
on Receiver Input Short or Open Events
• Hot-Swap Capability Eliminates False Transitions
ꢀ
DuringꢀPower-UpꢀorꢀHotꢀInsertion
●ꢀ High-SpeedꢀDataꢀRatesꢀupꢀtoꢀ20Mbps
●ꢀ Upꢀtoꢀ-40°Cꢀtoꢀ+125°CꢀOperatingꢀTemperature
●ꢀ AllowsꢀUpꢀtoꢀ128ꢀTransceiversꢀonꢀtheꢀBus
All devices feature enhanced electrostatic discharge (ESD)
protection. All transmitter outputs and receiver inputs are
protected to ±20kV HBM ESD, ±15kV Air-Gap ESD and
±8kV Contact ESD in accordance to IEC 61000-4-2.
Applications
●ꢀ Industrial-ControlꢀLocalꢀAreaꢀNetworks
●ꢀ TransceiversꢀforꢀEMI-SensitiveꢀApplications
●ꢀ Telecommuncations
The MAX3483AE, MAX3485AE, MAX3488AE, and
MAX3490AE are available in industry standard 8-pin SO
package, while the MAX3491AE is available in a 14-pin
SO package.
Ordering Information appears at end of data sheet.
Functional Diagram
19-8506; Rev 1; 9/17
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Absolute Maximum Ratings
(VoltagesꢀreferencedꢀtoꢀGND.)
V
.....................................................................-0.3Vꢀtoꢀ+4.0V
Junction Temperature......................................................+150°C
Storage Temperature Range............................ -65°Cꢀtoꢀ+150°C
CC
RO ............................................................ -0.3V to (V ꢀ+ꢀ0.3V)
CC
RE, DE, DI............................................................-0.3Vꢀtoꢀ+4.0V
A, B, Y, Z ............................................................-9.0Vꢀtoꢀ+13.0V
Short-CircuitꢀDurationꢀ(RO,ꢀA,ꢀB,ꢀY,ꢀZ)ꢀtoꢀGND.........Continuous
Operating Temperature Range
MAX3483AE/85AE/88AE/90AE/91AE.......... -40°Cꢀtoꢀ+125°C
MAX3488AE/90AE ....................................... -40°Cꢀtoꢀ+105°C
ContinuousꢀPowerꢀDissipationꢀ(T ꢀ=ꢀ+70°C)
A
8ꢀSOꢀ(derateꢀatꢀ7.6mW/°Cꢀaboveꢀ+70°C)...................606mW
14ꢀSOꢀ(derateꢀatꢀ11.9mW/°Cꢀaboveꢀ+70°C) ...............952mW
LeadꢀTemperatureꢀ(soldering,ꢀ10s) .................................+300°C
Soldering Temperature (reflow)......................................ꢀ+260°C
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.
(Note 1)
Package Thermal Characteristics
Junction-to-Case Thermal Resistance (θ
)
Junction-to-Ambient Thermal Resistance (θ
)
JA
JC
8-pin SO ......................................................................38°C/W
14-pin SO ....................................................................34°C/W
8-pin SO ....................................................................132°C/W
14-pin SO ....................................................................84°C/W
Note 1:ꢀ PackageꢀthermalꢀresistancesꢀwereꢀobtainedꢀusingꢀtheꢀmethodꢀdescribedꢀinꢀJEDECꢀspecificationꢀJESD51-7,ꢀusingꢀaꢀfour-layerꢀ
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V ꢀ=ꢀ+3.0Vꢀtoꢀ+3.6V,ꢀT = T
to T
, unless otherwise specified. Typical values are at V ꢀ=ꢀ+3.3VꢀandꢀT ꢀ=ꢀ+25°C.)ꢀ(Notesꢀ2,ꢀ3)
CC
A
MIN
MAX
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY
V
I
Supply Voltage
3.0
3.6
4
V
CC
DE = V , REꢀ=ꢀGND,ꢀnoꢀload
1.9
CC
Supply Current
mA
µA
CC
DE = 0, RE = 0, no load, DI = 0 or V
1.2
4.0
10
CC
I
Shutdown Supply Current
DEꢀ=ꢀGND,ꢀRE = V , MAX3483AE/85AE/91AE
CC
SHDN
DRIVER
V
V
= 3V, R ꢀ=ꢀ100Ω,ꢀFigureꢀ1
2.0
1.5
CC
L
V
Differential Driver Output
V
OD
= 3V, R ꢀ=ꢀ54Ω,ꢀFigureꢀ1
CC
L
Change in Magnitude of Differential
Output Voltage
∆V
R ꢀ=ꢀ54Ωꢀorꢀ100Ω,ꢀFigureꢀ1ꢀ(Noteꢀ4)
-0.2
+0.2
3
V
V
V
OD
L
V
Driver Common-Mode Output Voltage
R ꢀ=ꢀ54Ωꢀorꢀ100Ω,ꢀFigureꢀ1
V
/2
OC
L
CC
Change in Magnitude of Common-
Mode Voltage
ΔV
R ꢀ=ꢀ54Ωꢀorꢀ100Ω,ꢀFigureꢀ1ꢀ(Noteꢀ4)
-0.2
2.2
+0.2
OC
L
V
Single-Ended Driver Output High
A or B output, I
A or B output, I
= -20mA
= 20mA
V
OH
A or B
V
Single-EndedꢀDriverꢀOutputꢀLow
0.8
V
OL
A or B
V
V
ꢀ=ꢀ-7V
-250
mA
mA
OUT
I
Driver Short-Circuit Output Current
OSD
ꢀ=ꢀ+12V
250
OUT
Maxim Integrated
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Electrical Characteristics (continued)
(V ꢀ=ꢀ+3.0Vꢀtoꢀ+3.6V,ꢀT = T
to T
, unless otherwise specified. Typical values are at V ꢀ=ꢀ+3.3VꢀandꢀT ꢀ=ꢀ+25°C.)ꢀ(Notesꢀ2,ꢀ3)
CC
A
MIN
MAX
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER
V
V
ꢀ=ꢀ+12V
ꢀ=ꢀ-7V
430
-300
12
1000
DEꢀ=ꢀGND,ꢀV ꢀ=ꢀGND
orꢀ+3.6V
IN
CC
I
Input Current
µA
A, B
-450
-200
IN
C
Differential Input Capacitance
BetweenꢀAꢀandꢀB,ꢀDEꢀ=ꢀGND,ꢀfꢀ=ꢀ4MHz
pF
mV
mV
A, B
V
Receiver Differential Threshold Voltage
Receiver Input Hysteresis
-7Vꢀ≤ꢀV ꢀ≤ꢀ+12V
-105
10
-10
TH
CM
ΔV
V
= 0V
TH
CM
MAX3483AE/85AE
12
48
R
Receiver Input Resistance
-7Vꢀ≤ꢀV ꢀ≤ꢀ+12V
kΩ
IN
CM
MAX3488AE/90AE/91AE
LOGIC INTERFACE (DI, DE, RE, RO)
Input Voltage High
V
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, RE
2.0
V
V
IH
V
InputꢀVoltageꢀLow
0.8
IL
V
Input Hysteresis
50
mV
µA
kΩ
HYS
I
Input Current
±2
10
IN
Input Impedance on First Transition
1
- 1.5
REꢀ=ꢀGND,ꢀI
= -2mA,
RO
V
RO Output Voltage High
V
V
V
OHRO
CC
(V - V ) > 200mV
A
B
REꢀ=ꢀGND,ꢀI
= 2mA,
RO
V
ROꢀOutputꢀVoltageꢀLow
0.4
±1
OLRO
(V - V ) < -200mV
A
B
Receiver Three-State Output
Current
I
RE = V ,ꢀ0ꢀ≤ꢀV ꢀ≤ꢀV
CC
µA
OZR
CC
RO
REꢀPulldownꢀandꢀDEꢀPullupꢀ
Resistance
1
MΩ
RIN
Receiver Output Short-Circuit
Current
I
0ꢀ≤ꢀV ꢀ≤ꢀV
±110
mA
OSR
RO
CC
PROTECTION
T
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Temperature rising
+160
15
°C
°C
SHDN
IECꢀ61000-4-2ꢀAirꢀGapꢀDischargeꢀtoꢀGND
IECꢀ61000-4-2ꢀContactꢀDischargeꢀtoꢀGND
HumanꢀBodyꢀModelꢀtoꢀGND
±15
±8
ESDꢀProtectionꢀonꢀA,ꢀB,ꢀZ,ꢀandꢀYꢀ
Pins
kV
kV
±20
±2
ESDꢀProtection,ꢀAllꢀOtherꢀPins
Human Body Model
Maxim Integrated
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Switching Characteristics MAX3485AE/MAX3490AE/MAX3491AE
(V ꢀ=ꢀ+3Vꢀtoꢀ+3.6V,ꢀT = T
to T
, unless otherwise specified. Typical values are at V ꢀ=ꢀ+3.3VꢀandꢀT ꢀ=ꢀ+25°C.)ꢀ(Notesꢀ2,ꢀ3,ꢀ5)
CC
A
MINꢀ
MAX
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRIVER
t
30
30
DPLH
R ꢀ=ꢀ54Ω,ꢀC = 50pF,
L L
Figures 2 and 3
DriverꢀPropagationꢀDelay
ns
ns
t
DPHL
Driver Differential Output Rise or
Fall Time
R ꢀ=ꢀ54Ω,ꢀC = 50pF,
L
L
t
, t
7
HL LH
Figures 2 and 3
Differential Driver Output Skew
R ꢀ=ꢀ54Ω,ꢀC = 50pF,
Figuresꢀ2ꢀandꢀ3ꢀ(Noteꢀ6)
L
L
t
3
ns
DSKEW
|t
- t
|
DPLH DPHL
DR
Maximum Data Rate
20
Mbps
MAX
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
Driver Enable to Output High
MAX3485AE, MAX3491AE
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ7)
40
40
40
40
ns
ns
ns
ns
DZH
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
DriverꢀEnableꢀtoꢀOutputꢀLow
DriverꢀDisableꢀTimeꢀfromꢀLow
Driver Disable Time from High
MAX3485AE, MAX3491AE
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ7)
DZL
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
MAX3485AE, MAX3491AE
Figures 4 and 5
DLZ
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
MAX3485AE, MAX3491AE
DHZ
Figures 4 and 5
R ꢀ=ꢀ110Ω,ꢀC = 15pF, MAX3485AE,
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ7)
L
L
6
µs
µs
Driver Enable from Shutdown to
Output High
t
t
DLZ(SHDN)
R = 1kΩ, C = 15pF,
L
L
100
MAX3491AE, Figure 8
Driver Enable from Shutdown to
OutputꢀLow
R ꢀ=ꢀ110Ω,ꢀC = 15pF, MAX3485AE
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ7)
L
L
6
µs
ns
DHZ(SHDN)
t
Time to Shutdown
(Noteꢀ8)
50
20
800
SHDN
RECEIVER
t
35
35
RPLH
ReceiverꢀPropagationꢀDelay
C ꢀ=ꢀ15pF,ꢀFiguresꢀ6ꢀandꢀ7
ns
L
t
RPHL
C ꢀ=ꢀ15pF,ꢀFiguresꢀ6ꢀandꢀ7
L
t
Receiver Output Skew
2
ns
Mbps
ns
RSKEW
(Noteꢀ6)
DR
Maximum Data Rate
MAX
R ꢀ=ꢀ1kΩ,ꢀC = 15pF, MAX3485AE,
L
L
t
Receiver Enable to Output High
40
40
RZH
MAX3491AE,ꢀFigureꢀ8ꢀ(Noteꢀ7)
R ꢀ=ꢀ1kΩ,ꢀC = 15pF, MAX3485AE,
L
L
t
ReceiverꢀEnableꢀtoꢀOutputꢀLow
ReceiverꢀDisableꢀTimeꢀfromꢀLow
ns
ns
RZL
MAX3491AE,ꢀFigureꢀ8ꢀ(Noteꢀ7)
R ꢀ=ꢀ1kΩ,ꢀC = 15pF, MAX3485AE,
L
L
t
40
RLZ
MAX3491AE, Figure 8
Maxim Integrated
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Switching Characteristics MAX3485AE/MAX3490AE/MAX3491AE (continued)
(V ꢀ=ꢀ+3Vꢀtoꢀ+3.6V,ꢀT = T
to T
, unless otherwise specified. Typical values are at V ꢀ=ꢀ+3.3VꢀandꢀT ꢀ=ꢀ+25°C.)ꢀ(Notesꢀ2,ꢀ3,ꢀ5)
CC
A
MINꢀ
MAX CC
A
PARAMETER
SYMBOL
CONDITIONS
R ꢀ=ꢀ1kΩ,ꢀC = 15pF, MAX3485AE,
MIN
TYP
MAX
UNITS
L
L
t
Receiver Disable Time from High
40
ns
RHZ
MAX3491AE, Figure 8
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
MAX3485AE,ꢀFigureꢀ8ꢀ(Noteꢀ7)
L
L
6
100
6
µs
µs
µs
Receiver Enable from Shutdown to
Output High
t
RLZ(SHDN)
RHZ(SHDN)
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
MAX3491AE, Figure 8
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
MAX3485AE,ꢀFigureꢀ8ꢀ(Noteꢀ7)
Receiver Enable from Shutdown to
OutputꢀLow
t
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
MAX3491AE, Figure 8
L
L
100
800
µs
ns
t
Time to Shutdown
(Noteꢀ8)
50
SHDN
Switching Characteristics (MAX3483AE/MAX3488AE)
(V ꢀ=ꢀ+3Vꢀtoꢀ+3.6V,ꢀT = T
to T
, unless otherwise specified. Typical values are at V ꢀ=ꢀ+3.3VꢀandꢀT ꢀ=ꢀ+25°C.)ꢀ(Notesꢀ2,ꢀ3,ꢀ5)
CC
A
MINꢀ
MAX
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRIVER
t
1000
1000
DPLH
R ꢀ=ꢀ54Ω,ꢀC = 50pF,
Figures 2 and 3
L
L
DriverꢀPropagationꢀDelay
ns
ns
t
DPHL
Driver Differential Output Rise or
Fall Time
R ꢀ=ꢀ54Ω,ꢀC = 50pF,
L
L
t
, t
900
140
HL LH
200
250
Figures 2 and 3
Differential Driver Output Skew
R ꢀ=ꢀ54Ω,ꢀC = 50pF,
L
L
t
ns
DSKEW
|t
- t
|
Figures 2 and 3
DPLH DPHL
DR
Maximum Data Rate
kbps
MAX
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
Driver Enable to Output High
MAX3483AE
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ6)
2500
2500
100
100
10
ns
ns
ns
ns
µs
DZH
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
DriverꢀEnableꢀtoꢀOutputꢀLow
DriverꢀDisableꢀTimeꢀfromꢀLow
Driver Disable Time from High
MAX3483AE
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ6)
DZL
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
MAX3483AE
Figures 4 and 5
DLZ
R ꢀ=ꢀ110Ω,ꢀC = 50pF,
L
L
t
MAX3483AE
Figures 4 and 5
DHZ
R ꢀ=ꢀ110Ω,ꢀC = 15pF,
L
L
Driver Enable from Shutdown to
Output High
t
DLZ(SHDN)
MAX3483AE
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ6)
Maxim Integrated
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Switching Characteristics (MAX3483AE/MAX3488AE) (continued)
(V ꢀ=ꢀ+3Vꢀtoꢀ+3.6V,ꢀT = T
to T
, unless otherwise specified. Typical values are at V ꢀ=ꢀ+3.3VꢀandꢀT ꢀ=ꢀ+25°C.)ꢀ(Notesꢀ2,ꢀ3,ꢀ5)
CC
A
MINꢀ
MAX
CC
A
PARAMETER
SYMBOL
CONDITIONS
R ꢀ=ꢀ110Ω,ꢀC = 15pF, MAX3483AE
MIN
TYP
MAX
UNITS
Driver Enable from Shutdown to
OutputꢀLow
L
L
t
5.5
µs
DHZ(SHDN)
Figuresꢀ4ꢀandꢀ5ꢀ(Noteꢀ6)
t
Time to Shutdown
(Noteꢀ8)ꢀMAX3483AE
50
700
ns
SHDN
340
RECEIVER
t
200
200
RPLH
ReceiverꢀPropagationꢀDelay
C ꢀ=ꢀ15pF,ꢀFiguresꢀ6ꢀandꢀ7
L
ns
t
RPHL
C ꢀ=ꢀ15pF,ꢀFiguresꢀ6ꢀandꢀ7
(Noteꢀ6)
L
t
Receiver Output Skew
Maximum Data Rate
30
ns
RSKEW
DR
250
kbps
MAX
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
t
Receiver Enable to Output High
ReceiverꢀEnableꢀtoꢀOutputꢀLow
ReceiverꢀDisableꢀTimeꢀfromꢀLow
Receiver Disable Time from High
MAX3483AE
Figureꢀ8ꢀ(Noteꢀ6)
50
50
50
50
10
ns
ns
ns
ns
µs
RZH
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
t
MAX3483AE
Figureꢀ8ꢀ(Noteꢀ6)
RZL
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
t
MAX3483AE
Figure 8
RLZ
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
t
MAX3483AE
Figure 8
RHZ
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
Receiver Enable from Shutdown to
Output High
t
MAX3483AE
Figureꢀ8ꢀ(Noteꢀ6)
RLZ(SHDN)
RHZ(SHDN)
R ꢀ=ꢀ1kΩ,ꢀC = 15pF,
L
L
Receiver Enable from Shutdown to
OutputꢀLow
t
MAX3483AE
Figureꢀ8ꢀ(Noteꢀ6)
10
µs
ns
t
Time to Shutdown
(Noteꢀ8)ꢀMAX3483AE
50
340
800
SHDN
Note 2: All devices 100% production tested at T ꢀ=ꢀ+25°C.ꢀSpecificationsꢀoverꢀtemperatureꢀareꢀguaranteedꢀbyꢀdesign.
A
Note 3: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to ground,
unless otherwise noted.
Note 4:ꢀ ΔV ꢀandꢀΔV
are the changes in V
and V , respectively, when the DI input changes state.
OD
OC
OD OC
Note 5: Capacitive load includes test probe and fixture capacitance.
Note 6: Guaranteed by design; not production tested.
Note 7: The timing parameter refers to the driver or receiver enable delay, when the device has exited the initial hot-swap protect
state and is in normal operating mode.
Note 8: Shutdown is enabled by driving RE high and DE low. The device is guaranteed to have entered shutdown after t
has
SHDN
elapsed.
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Test and Timing Diagrams
A
V
CC
DE
R
L
2
A
B
DI
V
OD
R
L
C
L
V
OD
R
2
L
V
OC
B
Figure 1. Driver DC Test Load
Figure 2. Driver Timing Test Circuit
t
= 3ns, t = 3ns
HL
LH
V
CC
DI
1.5V
1.5V
0
t
t
DPHL
DPLH
B
A
V
OD
V
= [V - V ]
A B
OD
V
O
90%
90%
V
OD
0
10%
10%
-V
O
t
LH
t
HL
t
|t
- t
|
DSKEW = DPLH DPHL
Figure 3. Driver Propagation Delays
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
A
S1
DI
V
0
GND OR V
CC
OUT
CC
D
C
L
1.5V
B
DE
t
, t
R
110Ω
DZH DZH(SHDN)
L =
DE
0.25V
V
0
OH
1.5V
GENERATOR
OUT
50Ω
t
DHZ
Figure 4. Driver Enable and Disable Times (t
t
)
DZH, DHZ
V
CC
R
L =
110Ω
A
V
0
CC
S1
DI
0 OR V
OUT
CC
D
1.5V
DE
t
, t
DZL DZL(SHDN)
C
L
B
t
DLZ
V
CC
DE
OUT
1.5V
V
OL
0.25V
GENERATOR
50Ω
Figure 5. Driver Enable and Disable Times (t
, t
)
DZL DLZ
A
B
R
RO
ATE
V
ID
Figure 6. Receiver Propagation Delay Test Circuit
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
A
B
1V
-1V
t
t
RPHL
RPLH
V
OH
RO
1.5V
1.5V
V
OL
t
|t
- t
|
RSKEW = RPHL RPLH
Figure 7. Receiver Propagation Delays
+1.5V
-1.5V
S3
R
1kΩ
S1
S2
V
CC
RO
V
R
ID
C
L
15pF
RE
GENERATOR
50Ω
V
0
V
CC
CC
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
RE
RO
1.5V
1.5V
RE
0
t
t
RZH, RZH(SHDN)
t
, t
RZL RZL(SHDN)
V
V
OH
CC
2
CC
OL
V
V
CC
2
0
V
RO
RE
V
CC
V
CC
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
1.5V
1.5V
RE
RO
0
0
V
0
t
t
RLZ
RHZ
V
CC
OL
OH
0.25V
0.25V
V
RO
Figure 8. Receiver Enable and Disable Times
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Typical Operating Characteristics
(V ꢀ=ꢀ+3.3V,ꢀT ꢀ=ꢀ+25°C, unless otherwise specified.)
CC
A
MAX3483AE/88AE - 250Kbps
SUPPLY CURRENT vs. DATA RATE
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
NO LOAD SUPPLY CURRENT
vs. TEMPERATURE
TOC03
TOC01
TOC02
60
50
40
30
20
10
0
3
30
25
20
15
10
5
DE = VCC
RE = GND
DE = VCC
DE = GND
RE = VCC
MAX3483AE, 54Ω LOAD
2.5
2
MAX3483AE
MAX3488AE, 54Ω LOAD
MAX3488AE/90AE/91AE
MAX3485AE
1.5
1
MAX3485AE
MAX3488AE/90AE/91AE
MAX3483AE
MAX3488AE, NO LOAD
MAX3483AE NO LOAD
0.5
0
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
0
50
100
150
200
250
DATA RATE (kbps)
MAX3485AE/90AE/91AE – 20Mbps
SUPPLY CURRENT vs. DATA RATE
RECEIVER OUTPUT LOW VOLTAGE
vs. OUTPUT CURRENT
RECEIVER OUTPUT HIGH
VOLTAGE vs. OUTPUT CURRENT
TOC05
TOC04
TOC06
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
60
50
40
30
20
10
0
5
4
3
2
1
0
OUTPUT SOURCING CURRENT
OUTPUT SINKING CURRENT
DE = VCC
RE = GND
MAX3485AE, 54Ω LOAD
MAX3488AE/90AE/91AE
MAX3483AE/85AE
MAX3490AE/91AE, 54Ω load
MAX3485AE, NO LOAD
MAX3488AE/90AE/91AE
MAX3483AE/85AE
MAX3490AE/91AE, NO LOAD
0
5
10
15
20
0
10
20
30
40
50
60
0
10
20
30
40
DATA RATE (Mbps)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
MAX3483AE/88AE - 250Kbps
DRIVER PROPAGATION DELAY
vs. TEMPERATURE
DIFFERENTIAL DRIVER OUTPUT VOLTAGE
vs. TEMPERATURE
TOC8
TOC07
380
375
370
365
360
355
350
345
340
5
4.5
4
tDPLH, MAX3488AE
tDPHL, MAX3488AE
3.5
3
MAX3488AE/90AE91AE
2.5
2
1.5
1
MAX3483AE/85AE
tDPLH, MAX3483AE
tDPHL, MAX3483AE
RL = 54Ω
L = 50pF
0.5
0
C
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Typical Operating Characteristics (continued)
(V ꢀ=ꢀ+3.3V,ꢀT ꢀ=ꢀ+25°C, unless otherwise specified.)
CC
A
MAX3483AE/88AE – 250Kbps
DIFFERENTIAL DRIVER SKEW
vs. TEMPERATURE
MAX3485AE/90AE/91AE - 20Mbps
DRIVER PROPOGATION DELAY
vs. TEMPERATURE
MAX3485AE/90AE/91AE
DIFFERENTIAL DRIVER SKEW
vs. TEMPERATURE
TOC9
TOC10
TOC11
22
20
18
16
14
12
10
20
18
16
14
12
10
8
10
9
8
7
6
5
4
3
2
1
0
RL = 54Ω
RL = 54Ω
L = 50pF
tDPLH, MAX3490AE/91AE
CL = 50pF
C
tDPHL, MAX3490AE/91AE
MAX3483AE
MAX3490AE/91AE
6
MAX3485AE
4
2
tDPLH, MAX3485AE
0
RL = 54Ω
MAX3488AE
tDPHL, MAX3485AE
-2
-4
CL = 50pF
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
MAX3483AE/88AE
DRIVER OUTPUT RISE AND FALL TIME
vs. TEMPERATURE
MAX3485AE/90AE/91AE
DRIVER OUTPUT RISE/FALL TIME
vs. TEMPERATURE
MAX3483AE/88AE
DRIVER OUTPUT TRANSITION SKEW
vs. TEMPERATURE
TOC12
TOC14
TOC13
450
400
350
300
250
200
150
100
50
60
55
50
45
40
35
30
25
20
15
10
5
8
7
6
5
4
3
2
1
0
RL = 54Ω
CL = 50pF
tHL, MAX3483AE
tLH, MAX3485A
tHL, MAX3485AE
MAX3488AE
tLH, MAX3483AE
tLH, MAX3488AE
tHL, MAX3488AE
MAX3483AE
tLH, MAX3490AE/91AE
RL = 54Ω
RL = 54Ω
CL = 50pF
tHL, MAX3490AE/91AE
CL = 50pF
0
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
MAX3485AE/90AE/91AE
DRIVER OUTPUT TRANSITION SKEW
vs. TEMPERATURE
TOC15
4
3.5
3
RL = 54Ω
CL = 50pF
2.5
2
MAX3485AE
1.5
1
MAX3490AE/91AE
0.5
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Pin Configuration
TOPVIEW
+
1
2
3
4
5
6
7
14
13
12
11
10
9
N.C.
RO
VCC
N.C.
A
+
+
VCC
RO
1
2
3
4
8
7
6
5
A
B
Z
Y
RO
RE
DE
DI
1
2
3
4
8
7
6
5
VCC
RE
MAX3491AE
DE
B
MAX3488AE
MAX3490AE
B
MAX3483AE
MAX3485AE
DI
Z
DI
A
GND
GND
Y
GND
GND
8
N.C.
SO
SO
SO
Pin Description
PIN
NAME
FUNCTION
MAX3483AE MAX3488AE
MAX3485AE MAX3490AE
MAX3491AE
—
—
1, 8, 13
N.C.
NoꢀConnection.ꢀNotꢀinternallyꢀconnected.
Receiver Output. Drive RE low to enable RO. RO is always active on the
MAX3488AE and MAX3490AE. RO is high when the receiver inputs (VA -
VB)ꢀ>ꢀ-10mVꢀandꢀlowꢀwhenꢀ(VAꢀ-VB)ꢀ≤200mV.ꢀSeeꢀtheꢀFunctionꢀTables.
1
2
2
3
RO
Receiver Output Enable. Drive RE low, or leave unconnected, to enable
RO. RO is high impedance when RE is high. Drive RE high and DE low to
enter low-power shutdown mode. REꢀhasꢀaꢀweakꢀpulldownꢀtoꢀGND.
2
3
—
—
RE
Driver Enable. Drive DE high, or leave unconnected, to enable the driver
outputs (Y and Z for full duplex, A and B for half duplex). The driver
outputs are high impedance when DE is low. Drive RE high and DE low to
4
5
DE
enter low-power shutdown mode. DE has a weak pullup to V
.
CC
Driver Input. A low on DI forces the noninverting output (Y or A) low
and the inverting output (Z or B) high. Similarly, a high on DI forces the
noninverting output (Y or A) high and the inverting output (Z or B) low.
See the Function Tables.
4
3
DI
5
4
5
6
6,ꢀ7
9
GND
Y
Ground
—
—
NoninvertingꢀDriverꢀOutput
Inverting Driver Output
10
Z
Inverting Receiver Input/Driver Output (MAX3483AE/MAX3485AE).
Inverting Receiver Input (MAX3488AE/MAX3490AE/MAX3491AE).
7
6
8
7
8
1
11
12
14
B
A
NoninvertingꢀReceiverꢀInput/DriverꢀOutputꢀ(MAX3483AE/MAX3485AE).ꢀ
NoninvertingꢀReceiverꢀInputꢀ(MAX3488AE/MAx3490AE/MAX3491AE).
PositiveꢀSupply.ꢀBypassꢀV
toꢀGNDꢀwithꢀaꢀ0.1µFꢀcapacitorꢀasꢀcloseꢀasꢀ
CC
V
CC
possible to the IC.
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Function Tables (MAX3483AE, MAX3485AE)
TRANSMITTING
INPUTS
OUTPUTS
MODE
RE
X
DE
1
DI
1
B
A
1
0
0
1
Active
Active
X
1
0
0
0
X
X
High Impedance
High Impedance
Driver Disabled
Shutdown
1
0
RECEIVING
INPUTS
OUTPUTS
MODE
RE
0
DE
X
A-B
≥ꢀ-10mV
≤ꢀ-200mV
Open/Shorted
X
RO
1
Active
Active
0
X
0
0
X
1
Active
1
1
1
High Impedance
High Impedance
Receiver Disabled
Shutdown
0
X
X = Don’t care
Function Tables MAX3491AE
TRANSMITTING
INPUTS
OUTPUTS
RE*
X
DE*
1
DI
1
Y
Z
0
1
1
0
X
1
0
0
0
X
X
High-Impedance
Shutdown
1
0
RECEIVING
INPUTs
OUTPUT
RE*
DE*
X
V
- V
RO
A
B
0
0
0
1
1
≥ꢀ-10mV
1
X
≤ꢀ-200mV
0
1
X
Open/Shorted
1
X
X
High-Impedance
Shutdown
0
*RE and DE on the MAX3488AE and MAX3490AE are internal. The driver outputs and receiver are always active in these devices.
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Hot-Swap Capability
Hot-Swap Inputs
Detailed Description
The MAX3483AE/85AE and MAX3488AE/90AE/91AE
family are 3.3V ESD-protected RS-485/RS-422 transceivers
intended for half-duplex or full-duplex communications.
Integrated hot-swap functionality eliminates false transitions
on the bus during power-up or hot insertion.
Whenꢀ circuitꢀ boardsꢀ areꢀ insertedꢀ inꢀ aꢀ hotꢀ orꢀ poweredꢀ
backplane, disturbances on the enable inputs and differential
receiverꢀinputsꢀcanꢀleadꢀtoꢀdataꢀerrors.ꢀUponꢀinitialꢀcircuitꢀ
board insertion, the processor undergoes its power-up
sequence. During this period, the processor output drivers are
high impedance and are unable to drive the DE and RE
inputs MAX3483AE/85AE/91AE to a defined logic level.
Leakageꢀ currentsꢀ upꢀ toꢀ 10µAꢀ fromꢀ theꢀ high-impedanceꢀ
outputs of a controller could cause DE and RE to drift
to an incorrect logic state. Additionally, parasitic circuit
The device features fail-safe receiver inputs guaranteeing a
logic-high receiver output when inputs are shorted or open.
The MAX3483AE/85AE has a 1-unit load receiver input
impedance, allowing up to 32 transceivers on the bus. The
MAX3488AE/90AE/91AE has a 1/4-unit load receiver input
impedance, allowing up to 128 transceivers on the bus.
board capacitance could cause coupling of V ꢀorꢀGNDꢀ
CC
True Fail Safe
to DE and RE. These factors could improperly enable the
driver or receiver. The integrated hot-swap inputs help to
avoid these potential problems.
The transceiver family guarantee a logic-high receiver
output when the receiver inputs are shorted or open, or
when they are connected to a terminated transmission
line with all drivers disabled. If the differential receiver
input voltage (A–B) is greater than or equal to -10mV, RO
is logic-high.
Whenꢀ V
rises, an internal pulldown circuit holds DE
CC
low and RE high. After the initial power-up sequence, the
pulldown circuit becomes transparent, resetting the hot-
swap-tolerable inputs.
Driver Single-Ended Operation
Hot-Swap Input Circuitry
The driver outputs can either be used in the standard
differential operating mode, or can be used as single-ended
outputs. Since the driver outputs swing rail-to-rail, they
canꢀindividuallyꢀbeꢀusedꢀasꢀstandardꢀTTLꢀlogicꢀoutputs.
The DE and RE enable inputs feature hot-swap capability.
At the input, there are two nMOS devices, M1 and M2
(Figure 9).ꢀWhenꢀV
ramps from 0V, an internal 10µs
CC
timer turns on M2 and sets the SR latch that also turns
on M1. Transistors M2 (a 500µA current sink) and M1 (a
100µAꢀcurrentꢀsink)ꢀpullꢀDEꢀtoꢀGNDꢀthroughꢀaꢀ5kΩꢀ(typ)ꢀ
For half-duplex transceivers, driver outputs are A and B.
For full-duplex transceivers, driver outputs are Y and Z.
V
CC
10µs
TIMER
TIMER
DRIVER
ENABLE
5kΩ (typ)
DE
(HOT SWAP)
100µA
500µA
M1
M2
Figure 9. Simplified Structure of the Driver Enable (DE) Pin
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
resistor. M2 is designed to pull DE to the disabled state
against an external parasitic capacitance up to 100pF that
can drive DE high. After 10µs, the timer deactivates M2
while M1 remains on, holding DE low against three-state
leakages that can drive DE high. M1 remains on until an
external source overcomes the required input current.
Atꢀthisꢀtime,ꢀtheꢀSRꢀlatchꢀresetsꢀandꢀM1ꢀturnsꢀoff.ꢀWhenꢀ
M1 turns off, DE reverts to a standard, high-impedance
●ꢀ ±20kVꢀHBMꢀusingꢀJEDECꢀJS-001-2014.
●ꢀ ±15kVꢀusingꢀtheꢀAir-GapꢀDischargeꢀmethodꢀspecifiedꢀ
in IEC 61000-4-2.
●ꢀ ±8kVꢀusingꢀtheꢀContactꢀDischargeꢀmethodꢀspecifiedꢀinꢀ
IEC 61000-4-2.
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
CMOSꢀ input.ꢀ Wheneverꢀ V
drops below 1V, the hot-
CC
swap input is reset.
A complementary circuit employing two pMOS devices
pulls RE to V
Human Body Model (HBM)
.
CC
Figure 10 shows the HBM, and Figure 11 shows the current
waveform it generates when discharged into a low-
impedance state. This model consists of a 100pF capacitor
charged to the ESD voltage of interest, which is then
dischargedꢀintoꢀtheꢀtestꢀdeviceꢀthroughꢀaꢀ1.5kΩꢀresistor.
±20kV ESD Protection
ESD protection structures are incorporated on all pins
to protect against electrostatic discharges encountered
during handling and assembly. The driver outputs and
receiver inputs have extra protection against static
electricity. The ESD structures withstand high ESD in all
states: normal operation, shutdown, and powered down.
After an ESD event, the transceiver family keeps working
without latch-up or damage.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does not
specifically refer to integrated circuits. The transceiver
family helps in designing equipment to meet IEC 61000-4-2
without the need for additional ESD protection components.
ESD protection can be tested in various ways. The transmitter
outputs and receiver inputs are characterized for protection to
the following limits:
The major difference between tests done using the HBM
and IEC 61000-4-2 is higher peak current in IEC 61000-4-2
because series resistance is lower in the IEC 61000-4-2 model.
Hence, the ESD withstand voltage measured to IEC 61000-4-2
is generally lower than that measured using the HBM.
R
1.5kΩ
R
1MΩ
D
C
PEAꢆꢇTOꢇPEAꢆ RINGING
ꢈNOT DRAWN TO ꢉCAꢂEꢊ
I
100ꢀ
90ꢀ
I
P
R
DISCHARGE
RESISTANCE
CHARGE CURRENT-
LIMIT RESISTOR
AꢃPEREꢉ
36.8ꢀ
HIGH-
DEVICE
UNDER
TEST
VOLTAGE
DC
C
100pF
STORAGE
CAPACITOR
S
10ꢀ
0
SOURCE
TIꢃE
0
ꢁ
Rꢂ
ꢁ
Dꢂ
CꢄRRENT WAVEꢅORꢃ
Figure 10. Human Body ESD Test Model
Figure 11. Human Body Current Waveform
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│ 15
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Figure 12 shows the IEC 61000-4-2 model, and Figure
13 shows the current waveform for IEC 61000-4-2 ESD
Contact Discharge test.
RE and DE can be connected together and driven simul-
taneously. The transceiver is guaranteed not to enter
shutdown if RE is high and DE is low for less than 50ns.
If the inputs are in this state for at least 800ns (max), the
device is guaranteed to enter shutdown.
Applications Information
Driver Output Protection
Typical Applications
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus connection.
The first, a current limit on the output stage provides
immediate protection against short circuits over the whole
common-mode voltage range. The second, a thermal-
shutdown circuit, forces the driver outputs into a high-
impedanceꢀstateꢀifꢀtheꢀdieꢀtemperatureꢀexceedsꢀ+160°Cꢀ(typ).
The transceiver family is designed for bidirectional data
communications on multipoint bus transmission lines.
Figure 14 and Figure 15 show typical network application
circuits. To minimize reflections, terminate the line at both
ends with its characteristic impedance and keep stub
lengths off the main line as short as possible.
Low-Power Shutdown Mode
(MAX3483AE, MAX3485AE,MAX3491AE)
Low-powerꢀshutdownꢀmodeꢀisꢀinitiatedꢀbyꢀbringingꢀRE
high and DE low. In shutdown, the devices draw less
than 10µA of supply current.
R
C
R
D
I
50MΩ TO 100MΩ
330Ω
100ꢄ
90ꢄ
DISCHARGE
RESISTANCE
CHARGE CURRENT-
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
150pF
STORAGE
CAPACITOR
S
SOURCE
10ꢄ
ꢀ
R
ꢁ 0.7ꢂꢃ TO 1ꢂꢃ
ꢀ
30ꢂꢃ
60ꢂꢃ
Figure 12. IEC 61000-4-2 ESD Test Model
Figure 13. IEC 61000-4-2 ESD Generator Current Waveform
120Ω
120Ω
DE
B
B
DI
D
D
DI
DE
A
B
A
B
A
A
R
RO
RE
RO
RE
R
R
R
D
D
MAX3483AE/85AE
DE
RE
DI
DI
RO
DE RO RE
Figure 14. Typical Half-Duplex Application Circuit
Maxim Integrated
│ 16
www.maximintegrated.com
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
A
Y
D
RO
R
DI
RE
Z
B
Z
DE
DE
DI
B
A
RE
R
RO
D
Y
Y
Z
B
A
Y
Z
B
A
MAX3491AE
DI
DE
RE RO
DI
DE
RE RO
A
Y
RO
DI
R
D
D
DI
B
Z
Z
B
R
RO
A
Y
MAX3488AE
MAX3490AE
Figure 15. Typical Full-Duplex RS-485 Network
Maxim Integrated
│
17
www.maximintegrated.com
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Package Information
Chip Information
PROCESS:ꢀBiCMOS
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages.ꢀNoteꢀ
thatꢀaꢀ“+”,ꢀ“#”,ꢀorꢀ“-”ꢀinꢀtheꢀpackageꢀcodeꢀindicatesꢀRoHSꢀstatusꢀ
only.ꢀPackageꢀdrawingsꢀmayꢀshowꢀaꢀdifferentꢀsuffixꢀcharacter,ꢀbutꢀ
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 SOIC
8 SOIC
14 SOIC
S8+2
S8+4
21-0041
21-0041
21-0041
90-0096
90-0096
90-0112
S14+1
Ordering Information
PACKAGE
TEMPERATURE
RANGE
DATA RATE
(MAX)
PART
DUPLEX
PIN-PACKAGE
NODES
CODE
S8+2
S8+2
S8+4
S8+4
S14+1
-40°Cꢀtoꢀ+125°C
-40°Cꢀtoꢀ+125°C
-40°Cꢀtoꢀ+105°C
-40°Cꢀtoꢀ+105°C
-40°Cꢀtoꢀ+125°C
MAX3483AEASA+
MAX3485AEASA+
MAX3488AEGSA+
MAX3490AEGSA+
MAX3491AEASD+
Half
Half
Full
Full
Full
0.25Mbps
20Mbps
0.25Mbps
20Mbps
20Mbps
8 SO
8 SO
8 SO
8 SO
14 SO
32
32
128
128
128
+Denotes lead(Pb)-free/RoHS-compliant package.
Maxim Integrated
│ 18
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MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
DESCRIPTION
0
3/16
Initial release
—
UpdatedꢀGeneral Description, Functional Diagram, Absolute Maximum
Ratings, Electrical Characteristicsꢀtable,ꢀvariousꢀfigures,ꢀandꢀOrdering
Information table
1–6, 8, 10–12,
15–18
1
9/17
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 trademarks of Maxim Integrated Products, Inc.
ꢀ 2017ꢀMaximꢀIntegratedꢀProducts,ꢀInc.ꢀꢀ
│ 19
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