NTE74C923 - CMOS Key Encoders
The NTE74C922 (16 *Key, 18 *Lead DIP) and NTE74C923 (20 *Key, 20 *Lead DIP) 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
NTE74C923 Features
* D 50kΩ Maximum Switch On Resistance D On or Off Chip Clock D On
* Chip Row Pull
* Up Devices D 2 Key Roll
* Over D Keybounce Elimination with Single Capacitor D Last Key Register at Outputs D 3
* STATE Output LPTTL Compatible D Wide Supply range: 3V to 15V D Low Power Consum
