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SN74HC148

更新时间： 2024-09-29 23:03:11
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德州仪器 - TI 编码器
页数 文件大小 规格书
8页 129K
描述
8-LINE TO 3-LINE PRIORITY ENCODERS

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SN74HC148 数据手册

 浏览型号SN74HC148的Datasheet PDF文件第2页浏览型号SN74HC148的Datasheet PDF文件第3页浏览型号SN74HC148的Datasheet PDF文件第4页浏览型号SN74HC148的Datasheet PDF文件第5页浏览型号SN74HC148的Datasheet PDF文件第6页浏览型号SN74HC148的Datasheet PDF文件第7页 
SN54HC148, SN74HC148  
8-LINE TO 3-LINE PRIORITY ENCODERS  
SCLS109D – MARCH 1984 – REVISED MAY 1997  
SN54HC148 . . . J OR W PACKAGE  
SN74HC148 . . . D OR N PACKAGE  
(TOP VIEW)  
Encode Eight Data Lines to 3-Line Binary  
(Octal)  
Applications Include:  
– n-Bit Encoding  
– Code Converters and Generators  
4
5
V
CC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
EO  
GS  
3
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  
6
7
EI  
2
A2  
A1  
GND  
1
0
A0  
description  
The ’HC148 feature priority decoding of the inputs  
to ensure that only the highest-order data line is  
encoded. These devices encode eight data lines  
to 3-line (4-2-1) binary (octal). Cascading circuitry  
(enable input EI and enable output EO) has been  
provided to allow octal expansion without the  
needforexternalcircuitry. Datainputsandoutputs  
are active at the low logic level.  
SN54HC148 . . . FK PACKAGE  
(TOP VIEW)  
3
2
1
20 19  
18  
GS  
3
6
7
4
5
6
7
8
17  
16  
15  
14  
NC  
2
NC  
EI  
The SN54HC148 is characterized for operation  
over the full military temperature range of –55°C  
to 125°C. The SN74HC148 is characterized for  
operation from –40°C to 85°C.  
1
A2  
9 10 11 12 13  
NC – No internal connection  
FUNCTION TABLE  
INPUTS  
OUTPUTS  
EI  
H
L
0
X
H
X
X
X
X
X
X
1
X
H
X
X
X
X
X
X
2
X
H
X
X
X
X
X
L
3
X
H
X
X
X
X
L
4
X
H
X
X
X
L
5
X
H
X
X
L
6
X
H
X
L
7
X
H
L
A2  
H
H
L
A1  
H
H
L
A0  
H
H
L
GS  
H
H
L
EO  
H
L
L
H
H
H
H
H
H
L
H
H
H
H
H
L
L
H
L
L
L
H
H
H
H
L
H
H
L
L
L
H
H
H
L
H
L
L
L
H
H
H
H
L
L
H
L
H
L
L
L
X
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
H
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  
12345678

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SN74HC148 替代型号

型号 品牌 替代类型 描述 数据表
SN54HC148 TI

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