TM1721 LCD Display Driver IC with Integrated Keypad Scanning and PWM Backlight Control

TM1721 LCD Display Driver IC with Integrated Keypad Scanning and PWM Backlight Control

The TM1721 is a versatile LCD driver IC with an integrated keypad scanning interface, designed to offer advanced control and display features for a wide range of consumer electronics. It combines multiple functions into a single compact chip, including an MCU interface, data latch, LCD driving capabilities, keyboard scanning, and PWM-controlled magic backlight. The TM1721 is fully compatible with Titan Micro Electronics’ standard 3-port LED drive IC, allowing seamless integration into existing systems without requiring significant hardware changes.

Key Features:

• Energy-Efficient CMOS Process: Designed using a low-power CMOS process, the TM1721 ensures optimal energy consumption for power-sensitive applications.
• 32×4 Point LCD Driver: Drives a 32×4 dot matrix LCD, making it suitable for a variety of small to medium-sized LCD displays in consumer products.
• Integrated Keypad Scanning: Supports 6×4 key input scanning, eliminating the need for an additional microcontroller or external scanning IC, thus simplifying system design.
• PWM Magic Backlight Control: Offers 64 levels of PWM control for LED backlight, enabling dynamic and customizable magic backlight effects on LCD displays.
• Four General Input Ports: Provides flexibility with four input ports that can be used for dial wheel encoders, electronic switches, or other user interface elements.
• Adjustable LCD Bias and Working Voltage: The LCD drive bias can be adjusted, and the operating voltage for the LCD is also customizable, ensuring compatibility with various display modules.
• Serial Communication Interface: Equipped with a serial interface (CLK, STB, DIO), the TM1721 can easily interface with other devices in a communication system.
• Built-in RC Oscillator: Reduces external component requirements by integrating an RC oscillator, simplifying circuit design and reducing cost.
• Package Options: Available in SSOP48 and LQFP48 packages, providing flexibility for different product designs and space constraints.

Applications:

The TM1721 is the ideal solution for driving LCD displays and handling user input in applications such as:

• Home Entertainment Systems (VCR, VCD, DVD, Blu-ray players, and home theater systems)
• LCD Display Modules for various consumer devices
• Interactive Keypads and Touch Panels for user control
• LED Magic Backlighting for enhanced display aesthetics
• Consumer Electronics requiring an integrated LCD driver and keypad scanning solution

Advantages:

• Seamless Integration: The TM1721 works with existing LED display decoding boards and eliminates the need for a separate microcontroller for keypad scanning, significantly simplifying design and development.
• Cost-Effective Solution: By combining multiple functions (LCD driver, keypad scanning, backlight control) into a single IC, the TM1721 reduces system costs and space requirements, providing a more compact and economical solution.
• Enhanced User Experience: The advanced PWM backlight control allows for visually stunning effects, making the TM1721 perfect for modern consumer electronics that require both functional and aesthetic appeal.