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参数资料
| 型号： | MM74HC253N |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 通用总线功能 |
| 英文描述： | Dual 4-Channel TRI-STATE Multiplexer |
| 中文描述： | HC/UH SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 1/4页 |
| 文件大小： | 121K |
| 代理商： | MM74HC253N |
TL/F/5108
M
January 1988
MM54HC253/MM74HC253
Dual 4-Channel TRI-STATE
é
Multiplexer
General Description
The MM54HC253/MM74HC253 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 54HC/74HC logic family is functionally and pinout com-
patible with the standard 54LS/74LS logic family. All inputs
are protected from damage due to static discharge by inter-
nal diode clamps to V
CC
and ground.
Features
Y
Typical propagation delay: 24 ns
Y
Wide power supply range: 2V–6V
Y
Low quiescent current: 80
m
A maximum (74HC Series)
Y
Low input current: 1
m
A maximum
Y
Fanout of 10 LS-TTL loads
Connection Diagram
Dual-In-Line Package
TL/F/5108–1
Order Number MM54HC253 or MM74HC253
Truth Table
Select
Inputs
Data Inputs
Output
Control
Output
B
A
C0
C1
C2
C3
G
Y
X
L
L
L
L
H
H
H
H
X
L
L
H
H
L
L
H
H
X
L
H
X
X
X
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
X
X
L
H
H
L
L
L
L
L
L
L
L
Z
L
H
L
H
L
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
é
is a registered trademark of National Semiconductor Corp.
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
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