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MM54C922 16 / 20-Key Encoder

MM54C922 Description

MM54C922 MM74C922 16-Key Encoder MM54C923 MM74C923 20-Key Encoder July 1993 MM54C922 MM74C922 16-Key Encoder MM54C923 MM74C923 20-Key Encoder Genera.
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 ex.

MM54C922 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

MM54C922 Applications

* Synchronous Handshake (MM74C922) Synchronous Data Entry Onto Bus (MM74C922) TL F 6037
* 10 TL F 6037
* 11 Outputs are enabled when valid entry is made and go into TRI-STATE when key is released Note 3 The keyboard may be synchronously scanned by omitting the capacitor at osc and d

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20-Key Encoder National
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