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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.