MAX3243IDW [TI]
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER; 3V至5.5V多通道RS - 232线路驱动器/接收器
| 型号： | MAX3243IDW |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER |
| 文件： | 总11页 (文件大小：162K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
DB, DW, OR PW PACKAGE
Single-Chip and Single-Supply Interface for
IBM PC/AT Serial Port
(TOP VIEW)
Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
C2+
C2–
C1+
V+
1
28
27
26
25
24
23
22
21
20
19
18
2
Operates With 3-V to 5.5-V V
Supply
CC
V–
V
3
CC
Always-Active Noninverting Receiver
Output (ROUT2B)
RIN1
GND
4
RIN2
C1–
5
RIN3
FORCEON
FORCEOFF
INVALID
ROUT2B
ROUT1
ROUT2
6
Operates up to 250 kbit/s
RIN4
7
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
Accepts 5-V Logic Input With 3.3-V Supply
RIN5
8
DOUT1
DOUT2
DOUT3
9
10
11
Designed to Be Interchangeable With
Maxim MAX3243
DIN3 12
DIN2 13
DIN1 14
17 ROUT3
16 ROUT4
15 ROUT5
Serial-Mouse Driveability
RS-232 Bus-Pin ESD Protection Exceeds
±15-kV Using Human-Body Model (HBM)
Applications
– Battery-Powered Systems, PDAs,
Notebooks, Laptops, Palmtop PCs, and
Hand-Held Equipment
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
The MAX3243 device consists of three line drivers, five line receivers, and a dual charge-pump circuit with
±15-kV ESD protection pin-to-pin (serial-port connection pins, including GND). The device meets the
requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication
controller and the serial-port connector. This combination of drivers and receivers matches that needed for the
typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors
allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting
output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered
down. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew
rate.
Flexible control options for power management are available when the serial port is inactive. The
auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of
operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF
is set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 µA.
Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
AT, IBM, and PC are trademarks of International Business Machines Corporation.
Copyright 2000, Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
description (continued)
Auto-powerdowncanbedisabledwhenFORCEONandFORCEOFFarehigh, andshouldbedonewhendriving
a serial mouse. With auto-powerdown enabled, the device is activated automatically when a valid signal is
applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any
receiver input. INVALID is high (valid data) if any receiver input voltage is greater than 2.7 V or less than –2.7 V
or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid data) if all receiver input
voltages are between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels.
The MAX3243C is characterized for operation from 0°C to 70°C. The MAX3243I is characterized for operation
from –40°C to 85°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
SHRINK
SMALL OUTLINE
(DB)
THIN SHRINK
SMALL OUTLINE
(PW)
T
A
SMALL OUTLINE
(DW)
0°C to 70°C
MAX3243CDB
MAX3243IDB
MAX3243CDW
MAX3243IDW
MAX3243CPW
MAX3243IPW
–40°C to 85°C
The DB, DW, and PW packages are available taped and reeled. Add the suffix R to
device type (e.g., MAX3243CDBR).
Function Tables
EACH DRIVER
INPUTS
OUTPUT
DOUT
DRIVER STATUS
VALID RIN
RS-232 LEVEL
DIN
FORCEON
FORCEOFF
X
L
X
H
H
L
L
X
X
Z
H
L
Powered off
H
H
H
H
H
H
Normal operation with
auto-powerdown disabled
H
L
X
Yes
Yes
No
No
H
L
Normal operation with
auto-powerdown enabled
H
L
L
L
Z
Z
Powered off by
auto-powerdown feature
H
L
H = high level, L = low level, X = irrelevant, Z = high impedance
EACH RECEIVER
INPUTS
OUTPUTS
ROUT2B ROUT
RECEIVER STATUS
RIN1,
RIN3–RIN5
VALID RIN
RS-232 LEVEL
RIN2
FORCEOFF
L
H
X
X
L
L
X
L
H
L
Z
Powered off while
ROUT2B is active
X
Z
H
L
L
L
H
H
H
H
H
Yes
Yes
Yes
Yes
No
L
H
L
Normal operation with
auto-powerdown
disabled/enabled
H
L
H
H
L
H
L
H
H
Open
Open
H
H = high level, L = low level, X=irrelevant, Z=highimpedance(off), Open=inputdisconnectedorconnected
driver off
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
logic diagram (positive logic)
14
13
12
9
10
11
DIN1
DOUT1
DOUT2
DOUT3
DIN2
DIN3
22
23
FORCEOFF
FORCEON
21
INVALID
Auto-powerdown
19
20
4
5
ROUT1
RIN1
RIN2
ROUT2B
18
17
16
15
ROUT2
6
7
ROUT3
ROUT4
ROUT5
RIN3
RIN4
RIN5
8
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
CC
Positive output supply voltage range, V+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
Negative output supply voltage range, V– (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to –7 V
Supply voltage difference, V+ – V– (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 V
Input voltage range, V : Driver (FORCEOFF, FORCEON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
I
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25 V to 25 V
Output voltage range, V : Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –13.2 V to 13.2 V
O
Receiver (INVALID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
+ 0.3 V
CC
Package thermal impedance, θ (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62°C/W
JA
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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 under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages are with respect to network GND.
2. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 3 and Figure 6)
MIN NOM
MAX
3.6
UNIT
V
= 3.3 V
= 5 V
3
4.5
2
3.3
5
CC
CC
CC
CC
Supply voltage
V
V
V
V
5.5
= 3.3 V
= 5 V
V
IH
Driver and control high-level input voltage
V
DIN, FORCEOFF, FORCEON
2.4
V
V
V
Driver and control low-level input voltage
Driver and control input voltage
Receiver input voltage
DIN, FORCEOFF, FORCEON
DIN, FORCEOFF, FORCEON
0.8
5.5
25
70
85
V
V
V
IL
0
–25
0
I
I
MAX3243C
MAX3243I
T
A
Operating free-air temperature
°C
–40
NOTE 3: Test conditions are C1–C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V = 5 V ± 0.5 V.
CC
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)
‡
PARAMETER
FORCEOFF, FORCEON
TEST CONDITIONS
MIN TYP
MAX
UNIT
I
I
Input leakage current
±0.01
0.3
1
±1
µA
No load,
Auto-powerdown disabled
Powered off
1
mA
FORCEOFF and FORCEON at V
CC
No load, FORCEOFF at GND
10
I
Supply current
CC
No load, FORCEOFF at V
FORCEON at GND,
,
CC
µA
Auto-powerdown enabled
1
10
All RIN are open or grounded
‡
All typical values are at V
= 3.3 V or V
CC
= 5 V, and T = 25°C.
CC
A
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V
= 5 V ± 0.5 V.
CC
CC
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)
†
PARAMETER
TEST CONDITIONS
All DOUT at R = 3 kΩ to GND
MIN TYP
MAX
UNIT
V
V
V
High-level output voltage
Low-level output voltage
5
5.4
OH
L
All DOUT at R = 3 kΩ to GND
–5
–5.4
V
OL
L
DIN1 = DIN2 = GND, DIN3 = V
3-kΩ to GND at DOUT3,
DOUT1 = DOUT2 = 2.5 mA
,
CC
Output voltage
(mouse driveability)
V
O
±5
V
I
I
High-level input current
Low-level input current
V = V
±0.01
±0.01
±1
±1
µA
µA
IH
I
CC
V at GND
I
IL
V
V
V
= 3.6 V,
V
O
V
O
V
O
V
O
= 0 V
CC
CC
CC
‡
I
±35
±60
mA
Short-circuit output current
OS
= 5.5 V,
= 0 V
r
Output resistance
, V+, and V– = 0 V,
= ±2 V
= ±12 V,
300
10M
Ω
o
I
off
Output leakage current
FORCEOFF = GND,
= 3.3 V or V = 5 V, and T = 25°C.
CC
V
CC
= 0 to 5.5 V
±25
µA
†
‡
All typical values are at V
CC
A
Short-circuit durations should be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one output
should be shorted at a time.
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V = 5 V ± 0.5 V.
CC
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)
†
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
UNIT
C
= 1000 pF,
R
L
= 3 kΩ,
See Figure 1
L
Maximum data rate
250
kbit/s
One DOUT switching,
R
= 3 kΩ to 7 kΩ,
L
§
t
Pulse skew
C
= 150 pF to 2500 pF
L
100
ns
sk(p)
See Figure 2
C
C
= 150 pF to 1000 pF
6
4
30
30
Slew rate, transition region
(see Figure 1)
V
R
= 3.3 V,
= 3 kΩ to 7 kΩ
L
L
CC
L
SR(tr)
V/µs
= 150 pF to 2500 pF
†
§
All typical values are at V
= 3.3 V or V
= 5 V, and T = 25°C.
A
CC
Pulse skew is defined as |t
CC
| of each channel of the same device.
– t
PLH PHL
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V = 5 V ± 0.5 V.
CC
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
RECEIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 6)
†
PARAMETER
High-level output voltage
Low-level output voltage
TEST CONDITIONS
MIN
– 0.6 V
TYP
MAX
UNIT
V
V
V
I
I
= –1 mA
= 1.6 mA
V
CC
V
– 0.1 V
OH
OH
CC
0.4
2.4
2.4
V
OL
OL
V
V
V
V
= 3.3 V
= 5 V
1.6
1.9
1.1
1.4
0.5
CC
CC
CC
CC
V
IT+
Positive-going input threshold voltage
Negative-going input threshold voltage
V
V
= 3.3 V
= 5 V
0.6
0.8
V
V
IT–
Input hysteresis (V
IT+
– V
)
V
hys
IT–
I
Output leakage current (except ROUT2B)
Input resistance
FORCEOFF = 0 V
V = ±3 V to ±25 V
±0.05
±10
µA
kΩ
off
r
3
5
7
i
I
†
All typical values are at V
= 3.3 V or V
= 5 V, and T = 25°C.
CC A
CC
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V
= 5 V ± 0.5 V.
CC
CC
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3)
†
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
UNIT
ns
t
t
t
t
t
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Output enable time
150
150
200
200
50
PLH
PHL
en
C
C
= 150 pF, See Figure 3
L
L
ns
ns
= 150 pF, R = 3 kΩ, See Figure 4
L
Output disable time
ns
dis
‡
Pulse skew
See Figure 3
= 5 V, and T = 25°C.
ns
sk(p)
†
‡
All typical values are at V
= 3.3 V or V
CC
Pulse skew is defined as |t
CC
A
– t
| of each channel of the same device.
PLH PHL
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V
CC
= 5 V ± 0.5 V.
CC
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
AUTO-POWERDOWN SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 5)
†
TYP
PARAMETER
TEST CONDITIONS
FORCEON = GND,
FORCEOFF = V
MIN
MAX
UNIT
Receiver input threshold
for INVALID high-level output voltage
V
V
V
V
V
2.7
V
T+(valid)
T–(valid)
T(invalid)
OH
CC
FORCEON = GND,
FORCEOFF = V
Receiver input threshold
for INVALID high-level output voltage
–2.7
–0.3
V
V
V
V
CC
FORCEON = GND,
FORCEOFF = V
Receiver input threshold
for INVALID low-level output voltage
0.3
0.4
CC
= –1 mA, FORCEON = GND,
I
OH
FORCEOFF = V
INVALID high-level output voltage
INVALID low-level output voltage
V
– 0.6
CC
CC
= 1.6 mA, FORCEON = GND,
I
OL
FORCEOFF = V
OL
CC
†
All typical values are at V
= 3.3 V or V
= 5 V, and T = 25°C.
CC A
CC
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 5)
†
PARAMETER
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Supply enable time
MIN TYP
MAX
UNIT
µs
t
t
t
1
valid
invalid
en
30
µs
100
µs
†
All typical values are at V
= 3.3 V or V
= 5 V, and T = 25°C.
CC A
CC
PARAMETER MEASUREMENT INFORMATION
3 V
0 V
Input
RS-232
Output
Generator
(see Note B)
50 Ω
C
t
t
TLH
L
THL
R
L
(see Note A)
V
OH
OL
3 V
–3 V
3 V
FORCEOFF
3 V
–3 V
Output
V
6 V
tTHL or tTLH
SR(tr)
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A.
C includes probe and jig capacitance.
L
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 1. Driver Slew Rate
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
PARAMETER MEASUREMENT INFORMATION
3 V
0 V
Input
1.5 V
1.5 V
RS-232
Output
Generator
(see Note B)
50 Ω
C
t
t
L
PHL
PLH
R
L
(see Note A)
V
V
OH
3 V
FORCEOFF
50%
50%
Output
OL
TEST CIRCUIT
C includes probe and jig capacitance.
L
VOLTAGE WAVEFORMS
NOTES: A.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 2. Driver Pulse Skew
3 V or 0 V
FORCEON
3 V
–3 V
Input
1.5 V
1.5 V
Output
Generator
(see Note B)
t
t
PLH
PHL
50 Ω
C
L
(see Note A)
3 V
V
V
OH
FORCEOFF
50%
50%
Output
OL
TEST CIRCUIT
C includes probe and jig capacitance.
L
VOLTAGE WAVEFORMS
NOTES: A.
B. The pulse generator has the following characteristics: Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 3. Receiver Propagation Delay Times
3 V
Input
1.5 V
1.5 V
V
CC
S1
GND
–3 V
3 V or 0 V
FORCEON
t
t
PHZ
PZH
(S1 at GND)
(S1 at GND)
R
L
V
OH
3 V or 0 V
Output
50%
Output
0.3 V
C
L
(see Note A)
FORCEOFF
50 Ω
t
t
PLZ
(S1 at V
PZL
(S1 at V
)
)
CC
CC
Generator
(see Note B)
0.3 V
Output
50%
V
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A.
C includes probe and jig capacitance.
L
B. The pulse generator has the following characteristics: Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
C.
D.
t
t
and t
and t
are the same as t
are the same as t
.
dis
en
PLZ
PZL
PHZ
PZH
.
Figure 4. Receiver Enable and Disable Times
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
PARAMETER MEASUREMENT INFORMATION
3 V
2.7 V
2.7 V
0 V
0 V
Receiver
Input
–2.7 V
–2.7 V
t
ROUT
–3 V
Generator
(see Note B)
50 Ω
t
invalid
valid
V
CC
50% V
50% V
CC
CC
0 V
INVALID
Output
t
Auto-
powerdown
en
INVALID
= 30 pF
≈V+
V+
C
L
(see Note A)
0.3 V
Supply
Voltages
V
CC
0 V
0.3 V
FORCEOFF
FORCEON
DIN
DOUT
≈V–
V–
TEST CIRCUIT
VOLTAGE WAVEFORMS
Valid RS-232 Level, INVALID High
2.7 V
0.3 V
Indeterminate
If Signal Remains Within This Region
For More Than 30 µs, INVALID Is Low
0 V
†
–0.3 V
Indeterminate
–2.7 V
Valid RS-232 Level, INVALID High
†
Auto-powerdown disables drivers and reduces
supply current to 1 µA.
NOTES: A.
C includes probe and jig capacitance.
L
B. The pulse generator has the following characteristics: PRR = 5 kbit/s, Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 5. INVALID Propagation Delay Times and Supply Enabling Time
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAX3243
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS350B – APRIL 1999 – REVISED JANUARY 2000
APPLICATION INFORMATION
28
C1+
27
1
V+
C2+
+
+
–
†
C3
C2
+
–
2
–
C1
26
C2–
V–
V
CC
+
–
C
BYPASS
= 0.1 µF
3
25
24
23
GND
C1–
–
+
C4
4
5
6
7
8
RIN1
FORCEON
FORCEOFF
RIN2
RIN3
22
RS-232 Inputs
RIN4
RIN5
21
20
INVALID
ROUT2B
9
DOUT1
DOUT2
19
18
17
10
ROUT1
ROUT2
RS-232 Outputs
5 kΩ
11
DOUT3
5 kΩ
Logic Outputs
12
13
14
DIN3
DIN2
DIN1
ROUT3
5 kΩ
16
15
Logic Inputs
ROUT4
ROUT5
5 kΩ
5 kΩ
†
C3 can be connected to V
or GND.
CC
NOTE A: Resistor values shown are nominal.
V
CC
vs CAPACITOR VALUES
V
CC
C1
C2, C3, and C4
3.3 V ± 0.3 V
5 V ± 0.5 V
3 V to 5.5 V
0.1 µF
0.047 µF
0.1 µF
0.1 µF
0.33 µF
0.47 µF
Figure 6. Typical Operating Circuit and Capacitor Values
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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