SN75123

DUAL LINE DRIVER

SLLS086C – SEPTEMBER 1973 – REVISED APRIL 1998

1

POST OFFICE BOX 655303

IBM

™ System 360 Input/Output Interface

Specification

Structure for Party-Line Operation

SN75124

N8T13 and N8T23

description

The SN75123 is a dual line driver specifically designed to meet the input/output interface specifications for IBM

System 360. It also is compatible with standard-TTL logic and supply-voltage levels.

The SN75123 low-impedance emitter-follower outputs drive terminated lines such as coaxial cable or twisted

pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output

short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops

below approximately 1.5 V. All the inputs are in conventional TTL configuration, and the gating can be used

during power-up and power-down sequences to ensure that no noise is introduced to the line.

The SN75123 is characterized for operation from 0

°C to 70°C.

FUNCTION TABLE

INPUTS

OUTPUT

A

B

C

D

E

F

Y

H

H

H

H

X

X

H

X

XX

X

H

H

H

All other input combinations

L

H = high level, L = low level, X = irrelevant

Copyright

© 1998, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

IBM is a trademark of International Business Machines Corp.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1A

1B

1C

1D

1E

1F

1Y

GND

2F

2E

2D

2C

2B

2A

2Y

D OR N PACKAGE

(TOP VIEW)

THE SN751730 IS RECOMMENDED

FOR NEW IBM 360/370 INTERFACE DESIGNS.