3PEAK products are available at the authorized dealer Eitoku International.
The TPT29555-TS5R is a 16-bit GPIO expander IC that can extend the input/output ports of a microcontroller using an I²C interface. Even microcontrollers with limited I/O ports can easily add up to 16 digital inputs and outputs by using this product. It can be controlled with a simple connection via the I²C bus, which simplifies circuit design and supports the connection of multiple devices. Additionally, it features an interrupt function that notifies the microcontroller of changes in input signals, making it suitable for systems that require real-time performance. The power supply voltage ranges from 1.65V to 5.5V, allowing it to connect with various digital systems such as 1.8V, 3.3V, and 5V systems. Its low power consumption design makes it suitable for a wide range of applications, including industrial equipment, communication devices, PC peripherals, and embedded devices. It adopts a compact TSSOP package, achieving high-function I/O expansion while minimizing board space. Quantity: 372,000 units (as of March 6, 2026) Location: Shipped from Hong Kong Delivery time: 3-5 days (may vary depending on quantity and timing) FedEx, DHL
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basic information
Interface: I²C Number of GPIOs: 16bit Supply Voltage: 1.65V to 5.5V I²C Communication Speed: Up to 400kHz (Fast Mode) Standby Current: 3µA (typ, 5V) I/O Voltage Tolerance: 5V tolerant Interrupt Output: Open-drain (INT pin) Address Setting: 3 pins (up to 8 devices can be connected) Built-in Features: Weak pull-up resistor, power-on reset Operating Temperature Range: -40°C to +85°C Package: TSSOP-24 Packaging Form: Tape & Reel (4000 pcs)
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Applications/Examples of results
Usage - GPIO expansion for microcontrollers (solving I/O port shortages) - LED control - Reading switch and button inputs - Relay control - Sensor input expansion - Management of digital signal input and output By using I²C communication, it is possible to expand the input and output ports of microcontrollers, allowing many devices to be connected even with a limited number of GPIOs. Adoption Records / Examples of Use - Industrial equipment - Communication equipment - PC / server equipment - Embedded systems - IoT devices - Measurement equipment - Control boards I²C-connected GPIO expanders are widely used for controlling and expanding inputs for sensors, LEDs, fans, buttons, and more.
Company information
Our company was founded in Hong Kong in 2008 and has established branches in Tokyo, Japan, Shenzhen, Shanghai, Suzhou, Dalian, and other locations. We aim to be a partner recognized and trusted by customers and suppliers, achieving mutual success, a platform provider for employees and industry elites to realize life value, a top-class hybrid distributor in the industry, and a cohesive enterprise. Please feel free to contact us if you have any inquiries.
