Rev.2.00, Oct 06, 2005 page 1 of 7

HD74HC85

4-bit Magnitude Comparator

REJ03D0555-0200

(Previous ADE-205-427)

Rev.2.00

Oct 06, 2005

Description

The HD74HC85 is 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 next 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: t

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: I

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74HC85P

DILP-16 pin

PRDP0016AE-B

(DP-16FV)

P

—

HD74HC85FPEL

SOP-16 pin (JEITA)

PRSP0016DH-B

(FP-16DAV)

FP

EL (2,000 pcs/reel)

HD74HC85RPEL

SOP-16 pin (JEDEC)

PRSP0016DG-A

(FP-16DNV)

RP

EL (2,500 pcs/reel)

Note:

Please consult the sales office for the above package availability.