Rev.2.00 Mar 30, 2006 page 1 of 6

HD74HC679

12-bit Address Comparator

REJ03D0640-0200

(Previous ADE-205-526)

Rev.2.00

Mar 30, 2006

Description

The HD74HC679 address comparator simplifies addressing of memory boards and/or other peripheral devices. The

four P inputs are normally hard wired with a preprogrammed address. An internal decoder determines what input

information applied to the 12 A inputs must be low or high to cause a low state at the output (Y). For example, a

to the preprogrammed address is indicated by the output being low.

The HD74HC679 features and enable input (

G). When G is low, the device is enabled. When G is high, the device is

disabled and the output is high regardless of the A and P 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)

HD74HC679RPEL

SOP-20 pin (JEDEC)

PRSP0020DC-A

(FP-20DBV)

RP

EL (1,000 pcs/reel)