TLF6540

June 1989

54125DM54125DM74125

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 TTL output

with additional drive capability at the high Logic level to per-

mit the driving of bus lines without external pull-up resistors

When disabled both the output transistors are turned off

presenting a high-impedance 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 opposite logic levels the disable time

is shorter than the enable time of the outputs

Features

Y

Alternate MilitaryAerospace device (54125) is avail-

able Contact a National Semiconductor Sales Office

Distributor for specifications

Connection Diagram

Dual-In-Line Package

TLF6540 – 1

Order Number 54125DMQB 54125FMQB DM54125J DM54125W or DM74125N

See NS Package Number J14A 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