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MM54HC253 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # MM54HC253
Description  Dual 4-Channel TRI-STATE Multiplexer
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

MM54HC253 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF5108
January 1988
MM54HC253MM74HC253
Dual 4-Channel TRI-STATE
Multiplexer
General Description
The MM54HC253MM74HC253 utilizes advanced silicon-
gate CMOS technology to achieve the low power consump-
tion and high noise immunity of standard CMOS integrated
circuits along with the capability to drive 10 LS-TTL loads
The large output drive and TRI-STATE features of this de-
vice make it ideally suited for interfacing with bus lines in
bus organized systems When the output control input is
taken high the multiplexer outputs are sent into a high im-
pedance state
When the output control is held low the associated multi-
plexer chooses the correct output channel for the given in-
put signals determined by the select A and B inputs
The 54HC74HC logic family is functionally and pinout com-
patible with the standard 54LS74LS logic family All inputs
are protected from damage due to static discharge by inter-
nal diode clamps to VCC and ground
Features
Y
Typical propagation delay 24 ns
Y
Wide power supply range 2V – 6V
Y
Low quiescent current 80 mA maximum (74HC Series)
Y
Low input current 1 mA maximum
Y
Fanout of 10 LS-TTL loads
Connection Diagram
Dual-In-Line Package
TLF5108 – 1
Order Number MM54HC253 or MM74HC253
Truth Table
Select
Data Inputs
Output
Output
Inputs
Control
B
A
C0
C1
C2
C3
G
Y
X
X
XXXX
H
Z
L
L
L
XXX
L
L
L
L
H
XXX
L
H
L
H
XLX
X
L
L
L
H
XHX
X
L
H
H
L
X
XLX
L
L
H
L
X
XHX
L
H
H
H
XXX
L
L
L
H
H
XXX
H
L
H
Select inputs A and B are common to both sections
H e high level L e low level X e irrelevant Z e high impedance (off)
TRI-STATE
is a registered trademark of National Semiconductor Corp
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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