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HD74HC688

Hitachi Semiconductor
Part Number HD74HC688
Manufacturer Hitachi Semiconductor
Description 8-bit Magnitude Comparator
Published Mar 23, 2005
Detailed Description HD74HC688 8-bit Magnitude Comparator Description The HD74HC688 compares bit for bit two 8-bit words and indicates wheth...
Datasheet PDF File HD74HC688 PDF File

HD74HC688
HD74HC688

Overview
HD74HC688 8-bit Magnitude Comparator Description The HD74HC688 compares 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.
Features • • • • • High Speed Operation: tpd (P or Q to Output) = 17 ns typ (C L = 50 pF High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supp...


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