TTP229 16-Channel Digital Capacitive Touch Switch Sensor Module

TTP229 16-Channel Digital Capacitive Touch Switch Sensor Module is a high-density 16-key capacitive touch input expansion board powered by the Tontek TTP229 touch detector IC. Featuring a complete 4×4 keypad matrix of capacitive touch pads numbered 1 through 16, this module communicates touch events over a simple 2-wire serial synchronous interface (SCL/SDO) or parallel outputs, allowing microcontrollers to read 16 individual touch keys while consuming minimal GPIO pins.

Key Features:

• 16 Capacitive Touch Keys: Integrated 4×4 grid of capacitive copper touch zones labeled 1 to 16.
• 2-Wire Serial Synchronous Protocol: Streams all 16 key states over just two microcontroller pins (SCL and SDO).
• High Touch Sensitivity: Accurately senses touches through glass, plastic, and acrylic front panels.
• Onboard Power Indicator LED: Visual feedback confirms proper module power regulation.
• Configurable Options: Dedicated jumper pads configure 8-key or 16-key mode, multi-key or single-key lockout, and sampling rates.
• Bounce-Free Solid-State Operation: Zero mechanical moving parts ensures millions of operations without failure.

Technical Specifications:

• Operating Voltage: 2.4V to 5.5V DC
• Controller IC: Tontek TTP229-BSF 16-Key Capacitive Touch Detector
• Communication Interface: 2-Wire Serial Synchronous (Clock SCL, Data SDO) or 8-channel parallel
• Quiescent Current: 2.5 µA in sleep mode
• Max Clock Frequency: Up to 512 kHz
• Operating Temperature: -20°C to +70°C

Mechanical Specifications:

• PCB Structure: Double-sided through-hole FR-4 circuit board
• Header Type: 2.54mm standard pitch pin header
• Weight: Approximately 14 grams

Dimensions:

• Length: 65.0 mm
• Width: 50.0 mm
• Height: 6.0 mm

Pinout and Wiring:

• VCC: 2.4V to 5.5V DC Power Input
• GND: Ground (0V)
• SCL: Serial Clock Line (Input from MCU)
• SDO: Serial Data Output (Output to MCU)
• OUT1 – OUT8: Optional direct parallel output lines (in 8-key mode)

Datasheet Reference:

• Datasheet Reference: Consult Tontek TTP229-BSF 16-Key Touch Pad Detector IC Datasheet for serial timing diagrams.

Commonly Used in:

• Security access control systems and digital PIN code entry panels
• Smart home automation central touch consoles
• Industrial machinery parameter entry keypads
• Musical synthesizers and MIDI controller grids

Applications:

• Complete 4×4 numeric and menu navigation touch keypad
• Cleanroom sealed input consoles resistant to disinfectant fluids
• Password verification and vault locks
• Point-of-sale terminal touch interfaces

Equivalent Models:

• MPR121 12-Channel Capacitive Touch Breakout
• 4×4 Membrane Matrix Keypad
• TTP226 8-Channel Touch Module

Package Includes:

• 1 × TTP229 16-Channel Digital Capacitive Touch Switch Sensor Module