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74HC688 PDF预览

74HC688

更新时间: 2024-11-17 21:53:19
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA /
页数 文件大小 规格书
6页 206K
描述
8-Bit Equality Comparator

74HC688 数据手册

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SEMICONDUCTOR TECHNICAL DATA  
High–Performance Silicon–Gate CMOS  
The MC54/74HC688 is identical in pinout to the LS688. The device inputs  
are compatible with standard CMOS outputs; with pullup resistors, they are  
compatible with LSTTL outputs.  
The HC688 compares two 8–bit binary or BCD words and indicates  
whether or not they are equal. By using the Cascade Input, two or more of  
the devices may be cascaded to compare words of more than 8 bits.  
J SUFFIX  
CERAMIC PACKAGE  
CASE 732–03  
20  
20  
1
N SUFFIX  
PLASTIC PACKAGE  
CASE 738–03  
Output Drive Capability: 10 LSTTL Loads  
Outputs Directly Interface to CMOS, NMOS, and TTL  
Operating Voltage Range: 2 to 6 V  
1
Low Input Current: 1 µA  
DW SUFFIX  
SOIC PACKAGE  
CASE 751D–04  
High Noise Immunity Characteristic of CMOS Devices  
In Compliance with the Requirements Defined by JEDEC Standard  
No. 7A  
20  
1
Chip Complexity: 116 FETs or 29 Equivalent Gates  
ORDERING INFORMATION  
MC54HCXXXJ  
MC74HCXXXN  
MC74HCXXXDW  
Ceramic  
Plastic  
SOIC  
LOGIC DIAGRAM  
2
A0  
4
PIN ASSIGNMENT  
A1  
6
CASCADE  
INPUT  
A2  
1
20  
V
CC  
8
A3  
A4  
A5  
A6  
A7  
B0  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
DATA  
WORD  
A
A0  
B0  
A1  
2
3
4
19  
18  
17  
A = B  
11  
13  
15  
17  
3
INPUTS  
A7  
B1  
A2  
5
16  
15  
14  
13  
12  
11  
B6  
A6  
B5  
A5  
B4  
A = B  
OUTPUT  
19  
6
5
B2  
7
7
A3  
8
DATA  
WORD  
B
9
B3  
9
12  
14  
16  
18  
GND  
10  
INPUTS  
FUNCTION TABLE  
CASCADE  
INPUT  
1
Inputs  
Output  
PIN 20 = V  
CC  
PIN 10 = GND  
Data  
Words Cascade A = B  
A = B  
A > B  
A < B  
X
L
L
L
L
H
H
H
H
10/95  
REV 6  
Motorola, Inc. 1995  

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