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| 型號： | MM74HC42 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | BCD-to-Decimal Decoder |
| 中文描述： | BCD碼到十進(jìn)制解碼器 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大小： | 149K |
| 代理商： | MM74HC42 |
TL/F/5301
M
January 1988
MM54HC42/MM74HC42
BCD-to-Decimal Decoder
General Description
This decoder utilizes advanced silicon-gate CMOS technol-
ogy. Data on the four input pins select one of the 10 outputs
corresponding to the value of the BCD number on the in-
puts. An output will go low when selected, otherwise it re-
mains high. If the input data is not a valid BCD number all
outputs will remain high. The circuit has high noise immunity
and low power consumption usually associated with CMOS
circuitry, yet also has speeds comparable to low power
Schottky TTL (LS-TTL) circuits, and is capable of driving 10
LS-TTL equivalent loads.
All inputs are protected from damage due to static dis-
charge by diodes to V
CC
and ground.
Features
Y
Typical propagation delay: 15 ns
Y
Wide supply range: 2V–6V
Y
Low quiescent current: 80
m
A (74HC)
Y
Fanout of 10 LS-TTL loads
Connection Diagram
Dual-in-line Package
TL/F/5301–1
Top View
Order Number MM54HC42 or MM74HC42
Logic Diagram
Truth Table
No.
Inputs
D C B A
L
L
L
L
L
L
L
L
L
H
L
H
L
H H
L
H H H H H H H H H H
H
L
L
L
H H H H H H H H
H
L
L
H H H H H H H H H H
H
L
H
L
H H H H H H H H H H
H
L
H H H H H H H H H H H H
H H
L
L
H H H H H H H H H H
H H
L
H H H H H H H H H H H
H H H
L
H H H H H H H H H H
H H H H H H H H H H H H H H
Outputs
4
0
L
1
H H H H H H H H H
L
H H H H H H H H
H H
L
H H H H H H H
H H H H H
L
L
L
H H H H
L
H H H H H H
L
H H H H H H
2
3
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
L
L
H
L
H H
L
H H H H H H
L
H H H H H
L
H H H H
L
H H H
L
H H
L
H
L
INVALID
H
e
High Level, L
e
Low Level
TL/F/5301–2
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
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| MM74HC423_YBC3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| MM74HC423_YBC3116B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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| MM74HC423AM | 功能描述:單穩(wěn)態(tài)多諧振蕩器 Dual Multivibrator RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| MM74HC423AMTC | 功能描述:單穩(wěn)態(tài)多諧振蕩器 Dual Multivibrator RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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