Texas Instruments SN75185DW, SN75185DWR, SN75185N Datasheet
SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998
D
Single Chip With Easy Interface Between
UART and Serial Port Connector of IBM
PC/AT and Compatibles
D
Three Drivers and Five Receivers Meet or
Exceed the Requirements of TIA/EIA-232-F
and ITU v.28 Standards
D
Designed to Support Data Rates Up To
120 kbps
D
ESD Protection Meets or Exceeds 10 kV on
RS-232 Pins and 5 kV on All Other Pins
(Human-Body Model)
D
Pinout Compatible With the SN75C185
DW OR N PACKAGE
(TOP VIEW)
V
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DD
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
V
SS
V
CC
RY1
RY2
RY3
DA1
DA2
RY4
DA3
RY5
GND
description
The SN75185 combines three drivers and five receivers from TI trade-standard SN75188 and SN75189 bipolar
quadruple drivers and receivers, respectively. The pinout matches the flow-through design of the SN75C185
to decrease the part count, reduce the board space required, and allow easy interconnection of the UART and
serial-port connector of IBM PC/A T and compatibles. The bipolar circuits and processing of the SN75185
provides a rugged low-cost solution for this function at the expense of quiescent power and external passive
components relative to the SN75C185.
The SN75185 complies with the requirements of the TIA/EIA-232-F and ITU (formerly CCITT) v .28 standards.
These standards are for data interchange between a host computer and peripheral at signaling rates up to
20 kbit/s. The switching speeds of the SN75185 are fast enough to support rates up to 120 kbit/s with lower
capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be assured unless the
designer has design control of the cable and the interface circuits at both ends. For interoperability at signaling
rates to 120 kbit/s, use of TIA/EIA-423-B (ITU v .10) and TIA/EIA-422-B (ITU v.1 1) standards are recommended.
The SN75185 is characterized for operation over the temperature range of 0°C to 70°C.
logic symbol
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
IBM and PC/AT are trademarks of IBM Corporation.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
†
2
3
4
5
6
7
8
9
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.
19
18
17
16
15
14
13
12
RY1
RY2
RY3
DA1
DA2
RY4
DA3
RY5
logic diagram (positive logic)
Copyright 1998, Texas Instruments Incorporated
RY1RA1
RY2RA2
RY3RA3
DA1DY1
DA2DY2
RY4RA4
DA3DY3
RY5RA5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998
schematic of drivers
To Other Drivers
V
DD
Input DAx
GND
V
SS
Resistor values shown are nominal.
ESD
ESD
4.2 kΩ
To Other
Drivers
ESD
schematic (each receiver)
10.4 kΩ
To Other Drivers
9.4 kΩ11.6 kΩ
75.8 Ω
9 kΩ 5 kΩ
68.5 Ω3.3 kΩ
320 Ω
To Other Receivers
ESD
1.66 kΩ
ESD
ESD
V
CC
RYx Output
DYx Output
Input RAx
Resistor values shown are nominal.
ESD
3.8 kΩ
2 kΩ
10 kΩ
GND
To Other Receivers
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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
High-level output current, I
mA
Low-level output current, I
mA
SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Supply voltage, V
Supply voltage, V
Input voltage range: Driver –15 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver output voltage range –15 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver low-level output current 20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
Electrostatic discharge: Human-body model: RS-232 pins, class 3, A (see Note 3) 10 kV. . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 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 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 the network ground terminal.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
3. RS-232 pins are tested with respect to ground and each other.
4. Per MIL-PRF–38535
5. RS-232 pins are tested with respect to ground.
(see Note 1) 10 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(see Note 1) 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DD
(see Note 1) –15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SS
Receiver –30 V to 30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 2): DW package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JA
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Human-body model: All pins, class 3, A (see Note 4) 5 kV. . . . . . . . . . . . . . . . . . . . .
Machine model: RS-232 pins, class 3, B (see Note 5) 600 V. . . . . . . . . . . . . . . . . . .
Machine model: All pins, class 3, B (see Note 4) 300 V. . . . . . . . . . . . . . . . . . . . . . . .
†
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
Supply voltage, V
Supply voltage, V
High-level input voltage, VIH (driver only) 1.9 V
Low-level input voltage, VIL (driver only) 0.8 V
Operating free-air temperature, T
DD
SS
CC
p
p
Driver –6
OH
Receiver –0.5
Driver 6
OL
Receiver 16
A
7.5 9 15 V
–7.5 –9 –15 V
4.5 5 5.5 V
0 70 ° C
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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