TLF6387

June 1989

54LS125ADM54LS125ADM74LS125A

Quad TRI-STATE

Buffers

General Description

This device contains four independent gates each of which

performs a non-inverting buffer function The outputs have

the TRI-STATE feature When enabled the outputs exhibit

the low impedance characteristics of a standard LS output

with additional drive capability to permit the driving of bus

lines without external resistors When disabled both the

output transistors are turned off presenting a high-imped-

ance state to the bus line Thus the output will act neither as

a significant load nor as a driver To minimize the possibility

that two outputs will attempt to take a common bus to oppo-

site logic levels the disable time is shorter than the enable

time of the outputs

Features

Y

Alternate MilitaryAerospace device (54LS125) is avail-

able Contact a National Semiconductor Sales Office

Distributor for specifications

Connection Diagram

Dual-In-Line Package

TLF6387 – 1

Order Number 54LS125ADMQB 54LS125AFMQB 54LS125ALMQB

DM54LS125AJ DM54LS125AW DM74LS125AM or DM74LS125AN

See NS Package Number E20A J14A M14A N14A or W14B

Function Table

Inputs

Output

AC

Y

LL

L

HL

H

X

H

Hi-Z

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A