HD74HC679 Datasheet PDF - Renesas 12-bit Address Comparator Specs

HD74HC679 - 12-bit Address Comparator

Datasheet Summary

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.

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: tpd (A to Y) = 18 ns typ (CL = 50 p.

Datasheet Details

Part number	HD74HC679
Manufacturer	Renesas
File Size	196.54 KB
Description	12-bit Address Comparator
Datasheet	HD74HC679 Datasheet
Additional preview pages of the HD74HC679 datasheet.

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Full PDF Text Transcription

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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 positive-logic bit combination of 0111 (decimal 7) at the P input determines that inputs A1 through A7 must be low and that inputs A8 through A12 must be high to cause the output to go low. Equality of the address amplified at the A inputs to the preprogrammed address is indicated by the output being low. The HD74HC679 features and enable input (G).

Published: Dec 4, 2017 |