HT1621D Datasheet PDF – RAM Mapping 32x4 LCD Controller

Part Number : HT1621D

Function : RAM mapping 32×4 LCD controller for I/O MCU

Package : DIP 28 Pin

Manufacturers : Holtek Semiconductor

Pinouts :

HT1621D datasheet


Description :

The HT1621 is a 128 pattern (324), memory mapping, and multi-function LCD driver. The S/W configuration feature of the HT1621 makes it suitable for multiple LCD applications including LCD modules and display subsystems. Only three or four lines are required for the in terface between the host controller and the HT1621. The HT1621 contains a power down command to reduce power consumption.


1.Operating voltage: 2.4V~5.2V
2. Built-in 256kHz RC oscillator
3. External 32.768kHz crystal or 256kHz frequency source input
4. Selection of 1/2 or 1/3 bias, and selection of 1/2 or 1/3 or 1/4 duty LCD applications
5. Internal time base frequency sources
6. Two selectable buzzer frequencies (2kHz/4kHz)
7. Power down command reduces power consumption
8. Built-in time base generator and WDT
9. Time base or WDT overflow output
10. 8 kinds of time base/WDT clock sources
11. 3×24 LCD driver

Block Diagram

Other data sheets within the file : HT1621, HT1621B, HT1621G

HT1621D Datasheet PDF Download

HT1621D pdf