FEATURES
• Single Chip With Easy Interface Between
UART and Serial-Port Connector of
IBM™ PC/AT™ and Compatibles
• Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• 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)
• Pin-to-Pin Compatible With the SN75C185

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.
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.
The SN75185 is characterized for operation over the
temperature range of 0°C to 70°C.