The MM74C922N combines all elements needed to scan detect, debounce, encode, store, and transmit contact closures in an X/Y switch matrix. The IC combines these functions in a way that makes it useful ...

The iC-MHL200 encoder operates from a supply voltage of +5 V (±10%) within an operating temperature range of -40 to +125 °C. iC-HAUS GmbH. Continue Reading.

This implementation allows reading a 4x4 keypad without an external IC encoder (like the 74C922/23). It performs the same function as the IC, but in a simpler form. The module can be used in various ...

// Description: Keypad interface for matrix keypad with 24 keys. // Keypad layout: 4 x 4 hexadecimal keys on left, 4 x 2 unmarked keys on right // Scans 4 rows of keypad, checking 6 columns for input.