1FEATURES

2· Meets or Exceeds the Requirements of IBM?

360/370 Input/Output Interface Specification

for 4.5-Mb/s Operation

· Single 5-V Supply

· Uncommitted Emitter-Follower Output

Structure for Party-Line Operation

· Driver Output Short-Circuit Protection

· Driver Input/Receiver Output Compatible With

TTL

· Receiver Input Resistance . . . 7.4 kΩ to 20 kΩ

· Ratio Specification for Propagation Delay

Time, Low to High/High to Low

DESCRIPTION/

ORDERING INFORMATION

The SN751730 triple line driver/receiver is specifically

designed to meet the input/output interface

specifications for IBM System 360/370. It also is

compatible with standard TTL logic and supply

voltage levels.

The low-impedance emitter-follower driver outputs of

the SN751730 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 2.5 V.

An open line affects the receiver input as does a

low-level input voltage.

All the driver inputs and receiver outputs 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 by

pulling either DE1 or DE2 to a low level.