HT16C21 -- RAM Mapping 20x4/16x8 LCD Driver Controller

General Description

The HT16C21 device is a memory mapping and multi-function LCD controller/driver. The display segments of the device are 80 patterns (20 segments and 4 commons) or 128 patterns (16 segments and 8 commons). The software configuration feature of the HT16C21 device makes it suitable for multiple LCD applications including LCD modules and display subsystems. The HT16C21 device communicates with most microprocessors/microcontrollers via a two-line bidirectional I2C interface.

Features

  • Operating voltage: 2.4 ~ 5.5V
  • Internal 32kHz RC oscillator
  • Bias: 1/3 or 1/4; Duty: 1/4 or 1/8
  • Internal LCD bias generation with voltage follower buffers
  • I2C interface
  • Two selectable LCD frame frequencies: 80Hz or 160Hz
  • Up to 16 x 8 bits RAM for display data storage
  • Display patterns:
    - 20 x 4 patterns: 20 segments and
      4 commons
    - 16 x 8 patterns: 16 segments and
       8 commons
  • Versatile blinking modes
  • R/W address auto increment
  • Internal 16-step voltage adjustment to adjust LCD operating voltage
  • Low power consumption
  • Provides VLCD pin to adjust LCD operating voltage
  • Manufactured in silicon gate CMOS process
  • Package Type: 20/24/28 SOP, 16 NSOP and Chip

Technical Document

Other Information