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DS34C87T Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. DS34C87T
Description  CMOS Quad TRISTATE Differential Line Driver
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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DS34C87T Datasheet(HTML) 1 Page - National Semiconductor (TI)

   
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DS34C87T
CMOS Quad TRISTATE Differential Line Driver
General Description
The DS34C87T is a quad differential line driver designed for
digital
data
transmission
over
balanced
lines.
The
DS34C87T meets all the requirements of EIA standard
RS-422 while retaining the low power characteristics of
CMOS. This enables the construction of serial and terminal
interfaces while maintaining minimal power consumption.
The DS34C87T accepts TTL or CMOS input levels and
translates these to RS-422 output levels. This part uses spe-
cial output circuitry that enables the individual drivers to
power down without loading down the bus. This device has
separate enable circuitry for each pair of the four drivers.
The DS34C87T is pin compatible to the DS3487T.
All inputs are protected against damage due to electrostatic
discharge by diodes to V
CC and ground.
Features
n TTL input compatible
n Typical propagation delays: 6 ns
n Typical output skew: 0.5 ns
n Outputs won’t load line when VCC = 0V
n Meets the requirements of EIA standard RS-422
n Operation from single 5V supply
n TRI-STATE outputs for connection to system buses
n Low quiescent current
n Available in surface mount
Connection and Logic Diagrams
Truth Table
Input
Control
Non-Inverting
Inverting
Input
Output
Output
HH
H
L
LH
L
H
XL
Z
Z
L = Low logic state
H = High logic state
X = Irrelevant
Z = TRI-STATE (high performance)
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
Dual-In-Line Package
DS008576-1
Top View
Order Number DS34C87TM or DS34C87TN
See NS Package Number M16A or N16E
DS008576-2
May 1998
© 1998 National Semiconductor Corporation
DS008576
www.national.com


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