MC3487
QUADRUPLE DIFFERENTIAL LINE DRIVER
SLLS098A – MAY 1980 – REVISED MAY 1995
D
D
D
D
D
D
D
Meets or Exceeds Requirements of ANSI
EIA/TIA-422-B and ITU
Recommendation V.11
3-State, TTL-Compatible Outputs
Fast Transition Times
High-Impedance Inputs
Single 5-V Supply
Power-Up and Power-Down Protection
Designed to Be Interchangeable With
Motorola MC3487
D OR N PACKAGE
(TOP VIEW)
1A
1Y
1Z
1, 2EN
2Z
2Y
2A
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
4A
4Y
4Z
3, 4EN
3Z
3Y
3A
description
The MC3487 offers four independent differential line drivers designed to meet the specifications of ANSI
EIA/TIA-422-B and ITU Recommendation V.11. Each driver has a TTL-compatible input buffered to reduce
current and minimize loading.
The driver outputs utilize 3-state circuitry to provide high-impedance states at any pair of differential outputs
when the appropriate output enable is at a low logic level. Internal circuitry is provided to ensure a
high-impedance state at the differential outputs during power-up and power-down transition times provided the
output enable is low. The outputs are capable of source or sink currents of 48 mA.
The MC3487 is designed for optimum performance when used with the MC3486 quadruple line receiver. It is
supplied in a 16-pin dual-in-line package and operates from a single 5-V supply.
The MC3487 is characterized for operation from 0°C to 70°C.
logic symbol
†
1, 2EN
4
EN
2
3
6
5
1Y
1Z
2Y
2Z
logic diagram (positive logic)
1, 2EN
4
1A
1
1A
1
2
3
6
5
1Y
1Z
2Y
2Z
2A
7
2A
3, 4EN
12
EN
10
11
14
13
3Y
3Z
4Y
4Z
3A
3, 4EN
7
3A
9
12
4A
15
9
10
11
14
13
3Y
3Z
4Y
4Z
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
4A
15
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
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testing of all parameters.
Copyright
©
1995, Texas Instruments Incorporated
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