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NTE74C922

Part Number	NTE74C922
Manufacturer	NTE Electronics
Description	CMOS Key Encoders
Published	Jun 1, 2005
Detailed Description	NTE74C922 & NTE74C923 Integrated Circuit TTL− CMOS Key Encoders Description: The NTE74C922 (16−Key, 18−Lead DIP) and NTE...
Datasheet	NTE74C922 PDF File

Overview

NTE74C922 & NTE74C923 Integrated Circuit TTL− CMOS Key Encoders Description: The NTE74C922 (16−Key, 18−Lead DIP) and NTE74C923 (20−Key, 20−Lead DIP) 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 50kΩ 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 by omitting the capacitor.
A Data Available output goes to a high level when a valid keyboard ent...

Similar Datasheet

NTE74C922 CMOS Key Encoders - NTE Electronics
NTE74C923 CMOS Key Encoders - NTE

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