Part number:
74C922
Manufacturer:
National Semiconductor
File Size:
218.37 KB
Description:
16/ 20-key encoder.
74C922_NationalSemiconductor.pdf
Datasheet Details
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
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_NationalSemiconductor.pdf
Datasheet Details
74C922
National Semiconductor
218.37 KB
16/ 20-key encoder.
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