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M74C923 MM74C923

M74C923 Description

MM74C922 * MM74C923 16-Key Encoder * 20-Key Encoder October 1987 Revised January 1999 MM74C922 * MM74C923 16-Key Encoder www.

M74C923 Features

* s 50 kΩ maximum switch on resistance s On or off chip clock s On-chip row pull-up devices s 2 key roll-over s Keybounce elimination with single capacitor s Last key register at outputs s 3-STATE output LPTTL compatible s Wide supply range: 3V to 15V s Low power consumption Ordering Code: Order Numb

M74C923 Applications

* Synchronous Handshake (MM74C922) Synchronous Data Entry Onto Bus (MM74C922) The keyboard may be synchronously scanned by omitting the capacitor at osc. and driving osc. directly if the system clock rate is lower than 10 kHz Outputs are enabled when valid entry is made and go into 3-STATE when key

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