HT1621D Datasheet PDF – RAM Mapping 32×4 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. 3×2 4 LCD driver

Block Diagram

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

HT1621D Datasheet PDF Download

HT1621D pdf

Posts related to ‘ LCD%Controller

Part number Description
OZ9972ASN LCD TV Controller – O2Micro
RTD2033V2 RTD2033V2 – multi-purpose LCD controller
0Z9938GN LCDM Inverter Controller
OZ9936 OZ9936 – LCD Monitor CCFL Inverter Controller
OZ9966 Large-Size LCD TV Controller – O2Micro
OZ9933 LCDM Full-Bridge Controller
RTD2033V RTD2033V PDF – Multi-purpose LCD controller
TA9687GN LCDM Inverter Controller