HT16C21A
RAM Mapping 20×4 / 16×8 LCD Driver Controller
General Information
(HT16C21A 20SSOP Package Restricted Products. Notification Date : 2025/09/23 Effective Date : 2025/12/23)
The HT16C21A 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 HT16C21A device makes it suitable for multiple LCD applications including LCD modules and display subsystems. The HT16C21A device communicates with most microprocessors/microcontrollers via a two-line bidirectional I²C interface.
Feature Details
| Attribute | Value |
|---|---|
| Operating voltage | 2.4V~5.5V |
| Internal 32kHz RC oscillator | Available |
| Bias | 1/3 or 1/4; Duty: 1/4 or 1/8 |
| Internal LCD bias generation with voltage-follower buffers | Available |
| I²C interface | Available |
| Two selectable LCD frame frequencies | 80Hz or 160Hz |
| Up to 16×8 bits RAM for display data storage | Available |
| Display patterns: |
|
| Versatile blinking modes | Available |
| R/W address auto increment | Available |
| Internal 16-step voltage adjustment to adjust LCD operating voltage | Available |
| Low power consumption | Available |
| Provides the VLCD pin to adjust LCD operating voltage | Available |
| Manufactured in silicon gate CMOS process | Available |
| Package types | 20/24/28-pin SOP/SSOP and 16-pin NSOP |
Resources
| Title | Date | File Size | Language | Download |
|---|