HD74HCT688RPEL中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

Description

The HD74HCT688 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

? LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility

? High Speed Operation: tpd (Data to P=Q) = 18 ns typ (CL = 50 pF)

? High Output Current: Fanout of 10 LSTTL Loads

? Wide Operating Voltage: VCC = 4.5 to 5.5 V

? Low Input Current: 1 μA max

? Low Quiescent Supply Current: ICC (static) = 4 μA max (Ta = 25°C)