54LS125A DM54LS125A DM74LS125A Quad TRI-STATE Buffers
June 1989
54LS125A DM54LS125A DM74LS125A
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 Military Aerospace device (54LS125) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6387 鈥?1
Order Number 54LS125ADMQB 54LS125AFMQB 54LS125ALMQB
DM54LS125AJ DM54LS125AW DM74LS125AM or DM74LS125AN
See NS Package Number E20A J14A M14A N14A or W14B
Function Table
Y
e
A
Inputs
A
L
H
X
H
e
High Logic Level
L
e
Low Logic Level
X
e
Either Low or High Logic Level
Hi-Z
e
TRI-STATE (Outputs are disabled)
Output
C
L
L
H
Y
L
H
Hi-Z
TRI-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 6387
RRD-B30M105 Printed in U S A
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