SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
www.ti.com
SLLS181D–DECEMBER 1994–REVISED JANUARY 2006
FEATURES
N PACKAGE
(TOP VIEW)
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Single Chip With Easy Interface Between
UART and Serial-Port Connector of
IBM™ PC/AT™ and Compatibles
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CC
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DD
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
RY1
RY2
RY3
DA1
DA2
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DA3
RY5
GND
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Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
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Supports Data Rates up to 120 kbit/s
ESD Protection Meets or Exceeds 10 kV on
RS-232 Pins and 3.5 kV on All Other Pins
(Human-Body Model)
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Pin-to-Pin Compatible With the SN75C185
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DESCRIPTION/ORDERING INFORMATION
The SN75185 combines three drivers and five
receivers from the TI 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/AT™ and compatibles. The bipolar circuits and
processing of the SN75185 provide a rugged low-cost
solution for this function at the expense of quiescent
power and external passive components relative to
the SN75C185.
DB, DW, OR PW PACKAGE
(TOP VIEW)
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DD
CC
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
RY1
RY2
RY3
DA1
DA2
RY4
DA3
RY5
GND
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The SN75185 complies with the requirements of the
TIA/EIA-232-F and ITU 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.11) standards is
recommended.
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The SN75185 is characterized for operation over the
temperature range of 0°C to 70°C.
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.
IBM, PC/AT are trademarks of IBM Corporation.
PRODUCTION DATA information is current as of publication date.
Copyright © 1994–2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.