rent (IIN, ICC, and IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used. ... Operating Temperature Range (TA) â40. +85. °C.
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. This comparator is functionally and pin compatible to the 74LS688. All inputs are protected from damage due to static discharge by diodes to VCC and ground.
Features ■ Typical propagation delay: 20 ns ■ Wide power supply range: 2–6V ■ Low quiescent current: 80 µA (74 Series) ■ Large output current: 4 mA (74 Series) ■ Same as HC521
Ordering Code: Order Number
Package Number
MM74HC688WM MM74HC688SJ MM74HC688MTC MM74HC688N
Package Description
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
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