Datasheet4U Logo Datasheet4U.com

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.

Key Features

  • s Typical propagation delay: 20 ns s Wide power supply range: 2.
  • 6V s Low quiescent current: 80 µA (74 Series) s Large output current: 4 mA (74 Series) s Same as HC521 Ordering Code: Order Number MM74HC688WM MM74HC688SJ MM74HC688MTC MM74HC688N Package Number M20B M20D MTC20 N20A Package.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
MM74HC00 Quad 2-Input NAND Gate ON Semiconductor
MM74HC00 Quad 2-Input NAND Gate National Semiconductor
MM74HC02 Quad 2-Input NOR Gate ON Semiconductor
MM74HC04 Hex Inverter ON Semiconductor
MM74HC08 Quad 2-Input AND Gate ON Semiconductor

Other Datasheets by Fairchild (onsemi)

Part Number Description
MM74HC00 Quad 2-Input NAND Gate
MM74HC02 Quad 2-Input NOR Gate
MM74HC04 Hex Inverter
MM74HC08 Quad 2-Input AND Gate
MM74HC123A Dual Retriggerable Monostable Multivibrator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 drive 10 low power Schottky equivalent loads.