M74C923 - MM74C923

Product Overview

Fairchild Semiconductor

Datasheet Details

Part number	M74C923
Manufacturer	Fairchild Semiconductor
File Size	153.29 KB
Description	MM74C923
Datasheet	M74C923 Datasheet
Additional preview pages of the M74C923 datasheet.

Product details

Description

www.DataSheet4U.com The MM74C922 and MM74C923 CMOS key encoders provide all the necessary logic to fully encode an array of SPST switches.The keyboard scan can be implemented by either an external clock or external capacitor.These encoders also have on-chip pull-up devices which permit switches with up to 50 kΩ on resistance to be used.No diodes in the switch array are needed to eliminate ghost switches.The internal debounce circuit needs only a single external capacitor and can be defeated

Features

s 50 kΩ maximum switch on resistance s On or off chip clock s On-chip row pull-up devices s 2 key roll-over s Keybounce elimination with single capacitor s Last key register at outputs s 3-STATE output LPTTL compatible s Wide supply range: 3V to 15V s Low power consumption Ordering Code: Order Number MM74C922N MM74C922WM MM74C923WM MM74C923N Package Number N18A M20B M20B N20A Package.

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Published: Oct 6, 2008 |