HD74HC85 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74HC85

4-Bit Magnitude Comparator

Hitachi -> Renesas Electronics 

HD74HC85

4-Bit Magnitude Comparator

Description

The HD74HC85 id designed for high speed comparison of two four bit words. This circuit has eight

comparison input, 4 for each word; three cascade inputs (A < B, A > B, A = B); and three decision outputs

(A < B, A > B, A = B). The result of a comparison is indicated by a high level on one of the decision

outputs. thus it may be determined whether one word is “greater than,” “less than,” or “equal to” the other

word. by connecting the outputs of the least significant stage to the cascade inputs of the enxt stage, words

of greater than four bits can be compared. In addition the least significant stage must have a high level

applied to the A = B input, and a low level to the A < B, and A > B inputs.

Features

• High Speed Operation: tpd (Data Word Input to Output) = 20 ns typ (CL = 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 Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

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