MM54C923 16 / 20-Key Encoder

National

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.

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Datasheet Specifications

Part number: MM54C923
Manufacturer: National
File Size: 218.37 KB
Datasheet: MM54C923_NationalSemiconductor.pdf
Description: 16 / 20-Key Encoder

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

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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MM54C923 20-Key Encoder National

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