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参数资料
| 型号： | MM74HC147 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | 10-to-4 Line Priority Encoder |
| 中文描述： | 10到4线优先编码器 |
| 文件页数： | 1/4页 |
| 文件大小： | 108K |
| 代理商： | MM74HC147 |
TL/F/5007
M
November 1995
MM54HC147/MM74HC147
10-to-4 Line Priority Encoder
General Description
This high speed 10-to-4 Line Priority Encoder utilizes ad-
vanced silicon-gate CMOS technology. It possesses the
high noise immunity and low power consumption of stan-
dard CMOS integrated circuits. This device is fully buffered,
giving it a fanout of 10 LS-TTL loads.
The MM54HC147/MM74HC147 features priority encoding
of the inputs to ensure that only the highest order data line
is encoded. Nine input lines are encoded to a four line BCD
output. The implied decimal zero condition requires no input
condition as zero is encoded when all nine data lines are at
a high logic level. All data inputs and outputs are active at
the low logic level.
The 54HC/74HC logic family is functionally as well as pin-
out compatible with the standard 54LS/74LS logic family.
All inputs are protected from damage due to static dis-
charge by internal diode clamps to V
CC
and ground.
Features
Y
Low quiescent power consumption: 40
m
W maximum at
25
§
C
Y
High speed: 31 ns propagation delay (typical)
Y
Low input current: 1
m
A maximum
Y
Wide supply range: 2V to 6V
Connection and Logic Diagrams
Dual-In-Line Package
TL/F/5007–1
Top View
Order Number MM54HC147 or MM74HC147
Truth Table
Inputs
Outputs
1
2
3
4
5
6
7
8
9
D
C
B
A
H
X
X
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
L
H
H
X
X
X
X
X
X
L
H
H
H
X
X
X
X
X
L
H
H
H
H
X
X
X
X
L
H
H
H
H
H
X
X
X
L
H
H
H
H
H
H
X
X
L
H
H
H
H
H
H
H
X
L
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
L
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
H
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
e
High Logic Level, L
e
Low Logic Level, X
e
Irrelevant
TL/F/5007–2
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MM74HC147N | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MM74HC148 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:8-3 Line Priority Encoder |
| MM74HC148M | 功能描述:编码器、解码器、复用器和解复用器 8-3 Line Pri Encoder RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| MM74HC148MTC | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:8-3 Line Priority Encoder |
| MM74HC148MX | 制造商:Fairchild Semiconductor Corporation 功能描述:Encoder 8-to-3 Priority CMOS 16-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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