MM74HC688 8-Bit Magnitude Comparator (Equality Detector)
September 1983 Revised February 1999
MM74HC688 8-Bit Magnitude Comparator (Equality Detector)
General Description
The MM74HC688 equality detector utilizes advanced silicon-gate
CMOS technology to compare bit for bit two 8-bit words and indicates whether or not they are equal.
The P=Q output indicates equality when it is LOW.
A single active low enable is provided to facilitate cascading of several packages and enable comparison of words greater than 8 bits.
This device is useful in memory block decoding applications, where memory block enable signals must be generated from computer address information.
The comparator’s output can dri...