The HT16K33 is a memory mapping and multi-function LED controller driver. The max. Display segment numbers in the device is 128 patterns (16 segments and 8 commons) with a 13*3 (MAX.) matrix key scan circuit.
The software configuration features of the HT16K33 makes it suitable for multiple LED applications including LED modules and display subsystems. The HT16K33 is compatible with most microcontrollers and communicates via a two-line bidirectional I2C-bus.

Operating voltage: 4.5V~5.5V
Integrated RC oscillator
I2C-bus interface
16*8 bits RAM for display data storage
Max. 16 x 8 patterns, 16 segments and 8 commons
R/W address auto increment
Max. 13 x 3 matrix key scanning
16-step dimming circuit