HT16K33

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HT16K33

  • Manufacturer
  • Mfr. Part #HT16K33
  • Package
  • Datasheet
  • In Stock26550

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Specifications

Manufacturer Holtek Semicon
Package SOP-28-300mil
Operating temperature -40℃~+85℃
Dimming PWM

Overview

Description

The HT16K33 is an I2C interface driver for 16-segment LED displays, commonly used in various electronic applications for displaying alphanumeric characters. This chip can control up to 16 LEDs or segments, making it ideal for clock displays, temperature indicators, and other visual output needs.
Key features include:
1. I2C Communication: It allows easy integration with microcontrollers, facilitating multiple devices on the same bus.
2. Addressable: Supports multiple HT16K33 chips on the same I2C bus, with selectable addresses.
3. Built-in PWM Control: Enables brightness dimming for enhanced visual aesthetics.
4. Matrix Support: Can drive 8x8 LED matrices, expanding its usability.
5. Scan Rate Control: Adjusts refresh rates, optimizing performance for different applications.
Programming the HT16K33 typically involves sending commands over I2C to configure settings and update the display. Libraries for popular platforms like Arduino and Raspberry Pi simplify usage, making it accessible for hobbyists and professionals alike.

Features

The HT16K33 is a popular LED driver designed for controlling multiple LEDs, especially in matrix displays and seven-segment displays. Key features include:
1. I2C Interface: Supports easy communication with microcontrollers via I2C, allowing multiple devices on the same bus.
2. 16 Outputs: Controls up to 16 individual LED outputs, making it suitable for a range of applications.
3. Adjustable Brightness: Features a PWM (Pulse Width Modulation) control for adjusting the brightness of the LEDs.
4. Multiplexing: Supports multiplexing for driving larger displays without requiring additional components.
5. Key Scanning: Includes a built-in key scan function for reading inputs from buttons or switches.
6. Low Power Consumption: Operates efficiently, making it ideal for battery-powered devices.
7. Integrated Oscillator: No external components are needed for timing, simplifying circuit design.
Overall, the HT16K33 is versatile for various display and user interface applications.

Package

The HT16K33 is typically packaged in a 28-pin TSSOP (Thin Shrink Small Outline Package) or a 28-pin DIP (Dual In-line Package) format. These packages are designed for easy integration into electronic circuits, providing a compact solution for driving LED displays and controlling input/output functions.

Pinout

The HT16K33 is a 16-key multiplexer and LED driver IC with a total of 28 pins. Its primary function is to control LED matrices and keypads in various applications, such as displays and input devices.
Pin Count and Functions:
1. Power Supply Pins:
- VDD (Pin 1): Positive power supply.
- VSS (Pin 28): Ground.
2. Communication Pins:
- SCL (Pin 2): Serial clock for I2C communication.
- SDA (Pin 3): Serial data for I2C communication.
3. Configuration and Control:
- Pins for controlling LED outputs and keypad scanning.
4. Output Pins:
- A0-A7 (Pins 4-11): LED output pins.
- B0-B7 (Pins 12-19): Additional LED output pins.
5. Keypad Scanning:
- K0-K3 (Pins 20-23): Input pins for keypad scanning.
6. Miscellaneous:
- Pins for chip address selection and other control functionalities.
The HT16K33 is widely used due to its ability to simplify the driving of multiple LEDs and detecting key presses with minimal microcontroller resources.

Manufacturer

The HT16K33 is manufactured by Holtek Semiconductor, Inc. Holtek is a Taiwanese company that specializes in the design and production of microcontrollers, microcontroller units (MCUs), and various integrated circuits (ICs). Founded in 1998, Holtek primarily focuses on providing solutions for consumer electronics, industrial applications, and IoT devices. The HT16K33 itself is a popular LED driver IC that supports multiplexed 7-segment displays and matrix displays, widely used in hobbyist projects and commercial applications alike. Holtek's products are known for their versatility and are utilized across various sectors, including automotive, home appliances, and telecommunications.

Application

The HT16K33 is primarily used in applications for driving LED matrices and seven-segment displays. It is commonly found in devices like clocks, scoreboards, digital timers, and user interfaces in consumer electronics. The chip supports I2C communication, enabling easy integration into microcontroller projects, making it suitable for DIY electronics, educational kits, and hobbyist applications. Additionally, it can be utilized in decorative lighting and visual signage.

Equivalent

Equivalent products to the HT16K33 chip include the MAX7219, TM1637, and PCA9685. These chips serve similar functions for controlling LED displays and matrices. Depending on the application, you might also consider the HT16K33’s functionality in terms of I2C communication and multiplexing capabilities for alternatives like the TLC5940 or MCP23017 for GPIO expansion, although these may require additional components for LED control. Always check specifications to ensure compatibility with your project.

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