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SN74HC42

更新时间: 2024-11-05 23:03:11
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德州仪器 - TI 解码器
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6页 97K
描述
4-LINE TO 10-LINE DECODERS 1 of 10

SN74HC42 数据手册

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SN54HC42, SN74HC42  
4-LINE TO 10-LINE DECODERS (1 of 10)  
SCLS091B – DECEMBER 1982 – REVISED MAY 1997  
SN54HC42 . . . J OR W PACKAGE  
SN74HC42 . . . D OR N PACKAGE  
(TOP VIEW)  
Full Decoding of Input Logic  
All Outputs Are High for Invalid BCD  
Conditions  
0
V
A
B
Also for Applications as 3-Line to 8-Line  
Decoders  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
CC  
1
2
Package Options Include Plastic  
Small-Outline (D) and Ceramic Flat (W)  
Packages, Ceramic Chip Carriers (FK), and  
Standard Plastic (N) and Ceramic (J)  
300-mil DIPs  
3
C
D
9
4
5
6
8
GND  
7
description  
SN54HC42 . . . FK PACKAGE  
(TOP VIEW)  
These monolithic decimal decoders consist of  
eight inverters and ten 4-input NAND gates. The  
inverters are connected in pairs to make BCD  
input data available for decoding by the NAND  
gates. Full decoding of valid input logic ensures  
that all inputs remain off for all invalid input  
conditions.  
3
2
1
20 19  
18  
B
2
3
4
5
6
7
8
C
17  
16  
15  
14  
NC  
D
NC  
4
The SN54HC42 is characterized for operation  
over the full military temperature range of –55°C  
to 125°C. The SN74HC42 is characterized for  
operation from –40°C to 85°C.  
9
5
9 10 11 12 13  
NC – No internal connection  
FUNCTION TABLE  
INPUTS  
OUTPUTS  
NO.  
D
L
C
B
L
A
L
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
L
L
L
H
L
H
H
L
H
H
H
L
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
H
H
H
H
L
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
H
L
L
H
L
H
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
L
H
L
H
H
H
H
Invalid  
L
H
L
H
H
H
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 1997, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

SN74HC42 替代型号

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