器件名称:
74HC688
功能描述:
8-Bit Equality Comparator
文件大小:
202.61KB 共6页
简 介:
MOTOROLA SEMICONDUCTOR TECHNICAL DATA 8-Bit Equality Comparator 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. 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 MC54/74HC688 J SUFFIX CERAMIC PACKAGE CASE 732–03 1 20 20 1 N SUFFIX PLASTIC PACKAGE CASE 738–03 20 1 DW SUFFIX SOIC PACKAGE CASE 751D–04 ORDERING INFORMATION MC54HCXXXJ MC74HCXXXN MC74HCXXXDW Ceramic Plastic SOIC LOGIC DIAGRAM A0 A1 A2 DATA WORD A INPUTS A3 A4 A5 A6 A7 B0 B1 DATA WORD B INPUTS B2 B3 B4 B5 B6 B7 CASCADE INPUT 2 4 6 8 11 13 15 17 3 5 7 9 12 14 16 18 1 PIN 20 = VCC PIN 10 = GND 19 A=B OUTPUT PIN ASSIGNMENT CASCADE INPUT A0 B0 A1 B1 A2 B2 A3 B3 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 A7 B6 A6 B5 A5 B4 VCC A=B FUNCTION TABLE Inputs Data Words A=B A>B A
