Dot Matrix LED Display HT1635B Characteristics ► VDD = VLED = 5V ► I2C serial interface HT1635A with 4-Wire serial interface HT1635B with I2C serial interface ► Display pixels 42 rows × 8 commons × 2 chip IC includes maximum of 44 rows × 8 commons ► 16/16 PWM duty ► Selectable NMOS open drain output driver and PMOS open drain output driver for COM lines ► Package : 64-pin LQFP Application Areas 2015 Holtek New Product Presentation F17 Block Diagram 5V Power Circuit I2C LED Display 8×28×3(RGB) HT1635B (Master) 8COM × 42ROW HT1635B (Slave) 8COM × 42ROW MCU HT66F50 Application Circuit Master MCU Power Circuit HT66F50 LED Driver RGB LED Matrix Display HT1635B (Master) HT1635B (Slave) 2015 Holtek New Product Presentation F17