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SEMICONDUCTOR TECHNICAL DATA
MC34C87
Product Preview
Quad EIA-422-A Line Driver
P SUFFIX
PLASTIC DIP
CASE 648
CMOS
16
The MC34C87 is a quad differential line driver designed for digital data
transmission over balanced lines. The MC34C87 meets all the requirements of
standard EIA–422–A while retaining the low–power characteristics of CMOS.
The MC34C87 accepts TTL or CMOS input levels and translates these to
EIA–422–A output level. This part uses special output circuitry that enables the
individual drivers to power down without loading down the bus. The MC34C87
also includes special circuitry which will set the outputs to a high impedance
mode during power up or down, preventing spurious glitches. Each enable pin
controls two drivers.
The MC34C87 is pin compatible with the MC3487.
All pins are protected against damage due to electrostatic discharges.
1
D SUFFIX
SOG PACKAGE
CASE 751B
16
1
ORDERING INFORMATION
MC34C87P
MC34C87D
Plastic DIP
SOG Package
•
•
•
•
•
•
Maximum Power Supply Current: 3 mA
2000 V ESD Protection on the Inputs and the Outputs
TTL/CMOS Input Compatible
Typical Propagation Delay: 6 ns
Typical Output Skew: 1 ns
Meets VO = 6.0 V (and VO = – 0.25 V), VCC = 0 V, IO < 100 µA
Requirement
• Operation from Single 5 V Supply
• High Impedance Mode for Outputs Connected to System Buses
BLOCK DIAGRAM
C/D
CONTROL
INPUT D
12
8
VCC
15
16
GND
INPUT C
14
INPUT B
9
13
10
INPUT A
7
11
6
4
1
5
2
3
OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT
D2
D1
C2
C1
B2
B1
A2
A1
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
REV 3
1993
© Motorola, Inc. 1995
MOTOROLA
MC34C87
1
