DS3487 Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – Quad TRI-STATE Line Driver

May 1998
DS3487
Quad TRI-STATE^® Line Driver
General Description
National’s quad RS-422 driver features four independent
drivers which comply with EIA Standards for the electrical
characteristics of balanced voltage digital interface circuits.
The outputs are TRI-STATE structures which are forced to a
high impedance state when the appropriate output control
pin reaches a logic zero condition. All input pins are PNP
buffered to minimize input loading for either logic one or logic
zero inputs.
Features
n Four independent drivers
n TRI-STATE ^® outputs
n Fast propagation times (typ 10 ns)
n TTL compatible
n 5V supply
n Output rise and fall times less than 15 ns
n Pin compatible with DS8924 and MC3487
Block and Connection Diagrams
Dual-In-Line Package
DS005780-1
Truth Table
Input
Control
Input
H
H
L
H
X
L
L = Low logic state
H = High logic state
X = Irrelevant
Z = TRI-STATE(high impedance)
DS005780-2
Top View
Order Number DS3487M or DS3487N
See NS Package Number M16A or N16E
Non-Inverting
Output
H
L
Z
Inverting
Output
L
H
Z
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS005780
www.national.com