The BC6301, BC6040, BC6561, and BC6088 series keyboard interface chips feature a single-wire UART interface that directly outputs key values, significantly simplifying keyboard interface programming.

• Versatile Options: The series offers chip variants supporting anywhere from 30 to 88 keys. With a unified interface protocol, no code modifications are required when switching between different models.

• Advanced Key Handling: Supports any type and quantity of key combinations, and accommodates both normally open (NO) and normally closed (NC) switches simultaneously. It also handles long presses of any duration.

• Simple Connectivity: The single-wire interface facilitates easy electrical isolation and allows for remote keyboard implementation.

• Arduino Compatible: Fully compatible with Arduino; a dedicated library is provided for use with any Arduino hardware.

• Efficient Development: A C-language “UART Single-Wire Keyboard Interface Driver Library” is available. This allows users to implement a full-featured keyboard interface—including long presses and combination keys—with fewer than 10 lines of code.

• Low Power Design: Features a wide voltage range and low power consumption (microampere-level operating current), making it ideal for battery-powered devices.