MM74C922N, 16-Key Encoder IC, DIP-18

The MM74C922N is a 16-key encoder IC, designed to simplify keypad interfacing with microcontrollers and digital circuits. It converts the 4x4 matrix keypad inputs into a 4-bit binary output, reducing the number of required microcontroller pins. With a built-in debounce circuit, the MM74C922N ensures accurate key recognition, eliminating false triggers from mechanical switches. The two-key rollover feature allows recognition of a second key even if the first key is still pressed, improving usability in real-time applications. Operating over a voltage range of 3V to 15V, this IC is highly flexible and can be used in battery-powered and standard logic systems. The DIP-18 package makes it ideal for easy integration into embedded systems, keypads, industrial controls, and security access systems.

• 16-Key Encoder IC – Converts a 4x4 matrix keypad into a 4-bit binary output for microcontroller interfacing.
• Built-in Key Debounce Circuit – Eliminates false keypresses with a single external capacitor.
• Two-Key Rollover Feature – Allows recognition of a second keypress while the first key is still held down.
• On-Chip Row Pull-Up Resistors – Eliminates the need for external pull-up components, simplifying circuit design.
• Wide Operating Voltage Range – Functions between 3V and 15V, making it compatible with various digital systems​
• DIP-18 Package for Easy Prototyping – Standard through-hole package for easy PCB mounting and breadboarding.