MC54HC688J Motorola, MC54HC688J Datasheet

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MC54HC688J

Manufacturer Part Number
MC54HC688J
Description
8-bit equality comparator
Manufacturer
Motorola
Datasheet
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
8-Bit Equality Comparator
High–Performance Silicon–Gate CMOS
are compatible with standard CMOS outputs; with pullup resistors, they are
compatible with LSTTL outputs.
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.
10/95
Motorola, Inc. 1995
The MC54/74HC688 is identical in pinout to the LS688. The device inputs
The HC688 compares two 8–bit binary or BCD words and indicates
Output Drive Capability: 10 LSTTL Loads
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2 to 6 V
Low Input Current: 1 A
High Noise Immunity Characteristic of CMOS Devices
In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
Chip Complexity: 116 FETs or 29 Equivalent Gates
INPUTS
INPUTS
WORD
WORD
DATA
DATA
A
B
CASCADE
INPUT
A0
A1
A2
A4
A5
A6
A7
B0
B1
B2
B4
B5
B6
B7
A3
B3
12
14
16
18
2
4
6
8
11
13
15
17
3
5
7
9
1
LOGIC DIAGRAM
PIN 20 = V CC
PIN 10 = GND
19
OUTPUT
A = B
1
REV 6
20
MC54/74HC688
20
20
CASCADE
1
1
MC54HCXXXJ
MC74HCXXXN
MC74HCXXXDW
ORDERING INFORMATION
Words
INPUT
A = B
A > B
A < B
Data
1
GND
FUNCTION TABLE
X
PIN ASSIGNMENT
B1
A0
B0
A1
A2
B2
A3
B3
Inputs
1
2
3
4
5
6
7
8
9
10
Cascade
H
L
L
L
CERAMIC PACKAGE
PLASTIC PACKAGE
SOIC PACKAGE
CASE 751D–04
CASE 732–03
CASE 738–03
20
19
18
17
16
15
14
13
12
DW SUFFIX
11
N SUFFIX
Ceramic
Plastic
SOIC
J SUFFIX
Output
A = B
H
H
H
L
V CC
A = B
A7
B6
A6
B5
A5
B4

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MC54HC688J Summary of contents

Page 1

... DATA 9 B3 WORD INPUTS CASCADE 1 INPUT PIN PIN 10 = GND 10/95 Motorola, Inc. 1995 MC54/74HC688 ORDERING INFORMATION MC54HCXXXJ MC74HCXXXN MC74HCXXXDW CASCADE INPUT OUTPUT Words 1 REV 6 J SUFFIX CERAMIC PACKAGE CASE 732–03 N SUFFIX PLASTIC PACKAGE CASE 738–03 DW SUFFIX SOIC PACKAGE 1 CASE 751D–04 ...

Page 2

... Current (per Package) Î Î Î Î Î Î Î Î Î Î Î Î Î NOTE: Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D). MOTOROLA Î Î Î Î Î Î Î Î Î ...

Page 3

... NOTES: 1. For propagation delays with loads other than 50 pF, see Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D). 2. Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D). ...

Page 4

... One method of accomplishing this is shown here. HC688 MOST– SIGNIFICANT BITS B n CASCADE INPUT CASCADE 1 INPUT MOTOROLA TYPICAL APPLICATION HC688 A n– n–1 CASCADE INPUT EXPANDED LOGIC DIAGRAM 4 HC688 OUTPUT 8 LEAST– SIGNIFICANT BITS B o CASCADE INPUT OUTPUT High–Speed CMOS Logic Data DL129 — Rev 6 ...

Page 5

... B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 D 0.35 0.49 0.014 0.019 F 0.50 0.90 0.020 0.035 G 1.27 BSC 0.050 BSC J 0.25 0.32 0.010 0.012 K 0.10 0.25 0.004 0.009 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029 MOTOROLA ...

Page 6

... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “ ...

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