HT1623

The HT1623 is a 128-segment LCD driver with an integrated 4-wire serial interface, designed for driving dot-matrix LCD displays. It supports 1/4 duty cycle and 1/3 bias voltage, making it suitable for low-power applications like consumer electronics, industrial controls, and instrumentation.
Key features:
- 128 segments (32×4) with built-in display RAM.
- Serial interface (DATA, WR, CS, RD) for easy MCU communication.
- Low power consumption with power-saving modes.
- Wide voltage range (2.4V–5.2V) for flexibility.
- Adjustable contrast via software.
The HT1623 simplifies LCD control by handling segment driving internally, reducing MCU workload. It’s commonly used in digital thermostats, meters, and small displays.
For detailed usage, refer to the datasheet for initialization, command settings, and timing requirements.

The HT1623 is a 32×4 LCD driver. Equivalent products include:
- Holtek HT1621 (similar functionality, fewer segments)
- Sitronix ST7565 (supports more segments, graphic LCD)
- NXP PCF8576 (I²C-based LCD driver)
- TI MSP430 with LCD module (MCU with built-in LCD driver)
Check datasheets for exact compatibility.

The HT1623 is a versatile LCD driver IC commonly used in:
1. Consumer Electronics – Displays for appliances like microwaves, washing machines, and air conditioners.
2. Industrial Controls – Instrument panels, meters, and automation systems.
3. Medical Devices – Simple readouts for blood pressure monitors and thermometers.
4. Automotive Displays – Dashboard indicators and basic control panels.
5. Home Automation – Smart thermostats and security system interfaces.
It supports multiple segment outputs (up to 128), making it ideal for low-power, cost-effective LCD solutions.

The HT1623 is typically available in a SOP-48 (Small Outline Package) or DIP-48 (Dual In-line Package) format. These packages are standard for LCD driver ICs, offering compact size (SOP) or easy prototyping (DIP). Pin spacing is usually 0.6mm (SOP) or 2.54mm (DIP). Check datasheets for exact dimensions and variants.