74C922

16, 20-Key Encoder

GeneralDescription TheseCMOSkeyencodersprovideallthenecessarylogictofullyencodeanarrayofSPSTswitches.Thekeyboardscancanbeimplementedbyeitheranexternalclockorexternalcapacitor.Theseencodersalsohaveon-chippullupdeviceswhichpermitswitcheswithupto50kXon

74C922

16-Key Encoder 20-Key Encoder

GeneralDescription TheMM74C922andMM74C923CMOSkeyencodersprovideallthenecessarylogictofullyencodeanarrayofSPSTswitches.Thekeyboardscancanbeimplementedbyeitheranexternalclockorexternalcapacitor.Theseencodersalsohaveon-chippull-updeviceswhichpermitswitches

74C922

16-Key Encoder 20-Key Encoder

74C922-SO

IC Keyboard Encoder for up to 16 switches MM74C922 Replacement IC

The 74C922-SO is designed as a replacement chip for the obsolete MM74C922 surface mount part. The 74C922-SO contains all the logic necessary to encode a SPST keyboard switch array up to 4 by 4 in size and provide a 4 bit parallel output and a data available signal. The data available signal goes hig; ? Replacement Chip for MM74C922\r\n? Fully encodes a key switch array. (up to 4 x 4)\r\n? No external parts required.\r\n? Low power consumption 1.5 mA typical.\r\n? Supply voltage 2.4 to 5.25 volts.\r\n? Last key pressed retained on data outputs.\r\n? All timing internally generated.\r\n? 2 Key rol;

74C922-SO

Keyboard / Keypad Encoder for up to 16 switches