QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS121D – AUGUST 1990 – REVISED APRIL 1998
D Meets or Exceeds ANSI Standards
EIA/TIA-422-B and RS-485 and ITU
D High-Speed Advanced Low-Power Schottky
D Designed for 20-MBaud Operation in Both
Serial and Parallel Applications
D Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
D Low Supply-Current Requirements:
55 mA Max
D Wide Positive and Negative Input/Output
D Driver Output Capacity . . . ±60 mA
D Thermal Shutdown Protection
D Driver Positive and Negative Current
D Logically Interchangeable With SN75172
The SN75ALS172A comprises four line drivers
with 3-state differential outputs. They are
designed to meet the requirements of ANSI
Standards EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11. This device is optimized
for balanced multipoint bus transmission at rates
of up to 20 Mbaud. Each driver features wide
positive and negative common-mode output
voltage ranges, making it suitable for party-line
applications in noisy environments.
NC – No internal connection
The SN75ALS172A provides positive- and negative-current limiting and thermal shutdown for protection from
line-fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of
The SN75ALS172A is characterized for operation from 0°C to 70°C.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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