74C922 DIP IC Keyboard Encoder 16 Key (74C922 IC)

The 74C922 is a keyboard encoder integrated circuit designed to convert key press signals from a matrix keypad into a binary coded output. It supports up to sixteen keys and generates a 4 bit encoded output corresponding to the pressed key making it suitable for keypad interfacing in digital electronic systems.

This IC belongs to the CMOS logic family and provides low power consumption with reliable signal detection. It includes internal key debounce circuitry and data available output which simplifies keypad interfacing with microcontrollers and digital logic circuits. The DIP package allows easy integration in breadboard prototypes and PCB based designs.

Key Features

• Keyboard encoder supporting up to 16 keys
• Generates 4 bit binary encoded output
• Internal key debounce circuitry
• Data available output signal for key detection
• CMOS logic family for low power consumption
• Suitable for keypad and input interface systems
• DIP package suitable for prototyping and PCB mounting

Specifications

• IC Model = 74C922
• Logic Type = Keyboard encoder
• Key Support = 16 key matrix
• Output Code = 4 bit binary
• Logic Family = CMOS
• Package Type = DIP
• Pin Count = 18
• Operating Voltage = 3V to 15V

Interfaces

• X1 = Key matrix column input
• X2 = Key matrix column input
• X3 = Key matrix column input
• X4 = Key matrix column input
• Y1 = Key matrix row input
• Y2 = Key matrix row input
• Y3 = Key matrix row input
• Y4 = Key matrix row input
• D0 = Encoded output bit 0
• D1 = Encoded output bit 1
• D2 = Encoded output bit 2
• D3 = Encoded output bit 3
• DA = Data available output
• OE = Output enable
• OSC = Oscillator control
• VCC = Power supply