DS96172/DS96174 RS-485/RS-422 Quad Differential Line Drivers
June 1998
DS96172/DS96174
RS-485/RS-422 Quad Differential Line Drivers
General Description
The DS96172 and DS96174 are high speed quad differential
line drivers designed to meet EIA Standard RS-485. The de-
vices have TRI-STATE
®
outputs and are optimized for bal-
anced multipoint data bus transmission at rates up to
10 Mbps. The drivers have wide positive and negative com-
mon mode range for multipoint applications in noisy environ-
ments. Positive and negative current-limiting is provided
which protects the drivers from line fault conditions over a
+12V to −7.0V common mode range. A thermal shutdown
feature is also provided and occurs at junction temperature
of approximately 160˚C. The DS96172 features an active
high and active low Enable, common to all four drivers. The
DS96174 features separate active high Enables for each
driver pair. Compatible RS-485 receivers, transceivers, and
repeaters are also offered to provide optimum bus perfor-
mance. The respective device types are DS96173,
DS96175, DS96176 AND DS96177.
Features
n
n
n
n
n
n
n
n
n
Meets EIA Standard RS-485 and RS-422A
Monotonic differential output switching
Transmission rate to 10 Mbs
TRI-STATE outputs
Designed for multipoint bus transmission
Common mode output voltage range: −7V to +12V
Operates from single +5V supply
Thermal shutdown protection
DS96172/DS96174 are lead and function compatible
with the SN75172/75174 or the AM26LS31/MC3487
respectively
Connection Diagrams
16-Lead DIP
DS96172
16-Lead DIP
DS96174
DS009626-1
DS009626-2
Top View
Order Number DS96172CN or DS96174CN
See NS Package Number N16E
Top View
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS009626
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
