The Holtek HT16K24 is an LCD/LED controller and driver with key scan function, featuring an I²C interface. The device integrates LCD driving, LED control, key scan, and buzzer output functions to minimize external component requirements. It supports LCD configurations up to 24 segments × 4 COM, 22 segments × 6 COM, or 20 segments × 8 COM.

The HT16K24 features:

• I²C serial interface
• key scan for up to 24 keys
• LED driver with 4-level current adjustment per channel
• buzzer output frequencies: 1 kHz, 2 kHz, 4 kHz, 8 kHz
• wide operating voltage: 2.4 V to 5.5 V
• compact 32-pin QFN package