74C922

16/ 20-Key Encoder

National Semiconductor

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74C922 Datasheet (218.37 KB)

74C922 Datasheet Preview — Preview of 74C922 PDF

Datasheet Details

Part number:

74C922

Manufacturer:

National Semiconductor

File Size:

218.37 KB

Description:

16/ 20-key encoder.
MM54C922 MM74C922 16-Key Encoder MM54C923 MM74C923 20-Key Encoder July 1993 MM54C922 MM74C922 16-Key Encoder MM54C923 MM74C923 20-Key Encoder Genera.

74C922 Features

* Y Y Y Y Y Y Y Y Y 50 kX maximum switch on resistance On or off chip clock On-chip row pull-up devices 2 key roll-over Keybounce elimination with single capacitor Last key register at outputs TRI-STATE outpust LPTTL compatible Wide supply range Low power consumption 3V to 15V Connection Diagrams P

74C922 General Description

These 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 pullup devices which permit switches with up to 50 kX on resistance to be used No .

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TAGS

74C922 20-Key Encoder National Semiconductor

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