General Description - Harman Kardon AVR8000 Service Manual

AVR8000
MM54HC151 MM74HC151 8-Channel
Digital Multiplexer

General Description

This high speed Digital multiplexer utilizes advanced silicon-
gate CMOS technology Along with the high noise immunity
and low power dissipation of standard CMOS integrated cir-
cuits it possesses the ability to drive 10 LS-TTL loads The
MM54HC151 MM74HC151 selects one of the 8 data sourc-
es depending on the address presented on the A B and C
inputs It features both true (Y) and complement (W) out-
puts The STROBE input must be at a low logic level to
enable this multiplexer A high logic level at the STROBE
forces the W output high and the Y output low
The 54HC 74HC logic family is functionally as well as pin-
out compatible with the standard 54LS 74LS logic family
Connection and Logic Diagrams
Dual-In-Line Package
Order Number MM54HC151 or MM74HC151
C 1995 National Semiconductor Corporation
TL F 5313 –1
Top View
TL F 5313
All inputs are protected from damage due to static dis-
charge by internal diode clamps to V
Features
Typical propagation delay
Y
data select to output Y 26 ns
Wide operating supply voltage range 2 – 6V
Y
Low input current 1 mA maximum
Y
Low quiescent supply current 80 mA maximum (74HC)
Y
High output drive current 4 mA minimum
Y
Truth Table
Inputs
Select
C B A
X X X
L L L
L L H
L H L
L H H
H L L
H L H
H H L
H H H
H High Level L
e e
D0 D1 D7 the level of the respective D input
e
200
harman/kardon
November 1995
and ground
CC
Outputs
Strobe
S Y W
H L H
L D D
L D D
L D D
L D D
L D D
L D D
L D D
L D D
Low Level X Don't Care
e
TL F 5313 – 2
RRD-B30M115 Printed in U S A