The TTP229 16-Way Capacitive Touch Sensor Digital Keypad Module is a high-performance touch input solution designed for microcontroller, Arduino, and embedded system projects. This module uses the TTP229 capacitive touch sensing IC to deliver reliable, precise, and highly responsive touch detection across 16 independent touch channels. Ideal for modern electronic designs, this module replaces traditional mechanical keypads with a more durable, noise-resistant, and maintenance-free capacitive touch interface.

The module supports fast mode and low-power mode selection, adjustable sensitivity, auto-calibration, long on-time configuration options, and multiple output formats including direct mode, toggle mode, CMOS output, and open-drain output. With its built-in regulator, configurable pins, and flexible interface options, it is suitable for a wide range of DIY electronics, consumer products, smart home devices, touch-based control panels, and educational electronics projects.

This 16-channel touch sensor is easy to interface through I2C, as well as direct digital outputs, enabling smooth integration with microcontrollers like Arduino, ESP32, ESP8266, PIC, AVR, STM32, Raspberry Pi and more. The sensing pads operate through non-conductive dielectric materials, making it ideal for concealed or external touch panels.

Features:

• 16-channel capacitive touch sensor module based on TTP229 IC

• Highly sensitive touch detection through non-conductive materials

• Supports I2C interface for advanced key scanning

• Adjustable sensitivity for different applications and environments

• Built-in regulator with external enable/disable control

• Fast mode (approx. 100 ms response) and low-power mode (approx. 200 ms response) selectable by pad option

• Ultra-low operating current: approx. 2.5 µA (low power), 9 µA (fast mode) at 3V

• Direct mode and toggle mode output configuration

• CMOS or open-drain output selection

• Active high or active low output modes

• Auto-calibration every 4 seconds when keys are idle

• Long key on-time configurable: 120 sec / 64 sec / 16 sec / infinite

• Supports standalone mode (no microcontroller required)

• Durable, noise-resistant capacitive sensing technology

• Ideal for replacing mechanical keypads in consumer devices

How to Use

• Connect VCC (2.5–5.5V) and GND to your power source

• Connect SCL/SDA for I2C communication when using advanced modes

• For simple digital key reading, use direct output pins (active high or active low depending on configuration)

• Mount under acrylic or any non-metallic surface for hidden touch control

• Adjust sensitivity using the onboard configuration pads

• Configure modes (toggle, direct, output type, low power, fast mode) by soldering/jumpering specific pad options

• Use with Arduino or microcontroller libraries for easier integration

• Ideal for custom control panels, smart switches, digital locks, and touch-based menu interfaces

Applications

• Touch-based control panels

• DIY electronics and robotics

• Smart home switches and controllers

• IoT devices

• Consumer appliances

• Interactive kiosks

• Digital locks and access systems

• Home automation

• Programmable keypads

• Custom touch interface projects

Specifications:

• Operating Voltage: 2.5V–5.5V

• IC: TTP229 Capacitive Touch Controller

• Number of Keys: 16

• Output Format: I2C / CMOS / Open-Drain

• Response Time: 100 ms (fast), 200 ms (low power)

• Operating Current: 2.5 µA (low power), 9 µA (fast mode)

• Auto-Calibration Interval: 4 seconds

• Maximum Key On-Time: 120 sec / 64 sec / 16 sec / infinite

• Active Output Types: High or Low (selectable)

• Interface Options: Direct Key Output or Serial

• Sensing Material: Works through non-metallic surfaces

• Module Type: Digital capacitive touch sensor module

Included in Package

• 1 x TTP229 16-Way Capacitive Touch Sensor Digital Keypad Module

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