TTP223 Capacitive Touch Sensor Module

TTP223 Capacitive Touch Sensor Module provides a versatile and reliable alternative to traditional mechanical buttons in a wide range of electronic applications. This compact module operates based on the TTP223 touch-sensing IC, which detects the change in capacitance when a finger nears the sensing pad. Furthermore, the module features on-board solder pads that allow you to configure the output mode between active-high or active-low and toggle or momentary behavior. Consequently, designers can integrate this touch switch into waterproof or sealed enclosures, as the sensing field penetrates non-metallic materials like glass and plastic. Therefore, you can easily upgrade your user interface with this modern, wear-free sensing solution that eliminates the mechanical fatigue associated with standard tactile switches.

Key Features:

• High Sensitivity: The module detects light touch or proximity through various non-conductive materials up to several millimeters thick.
• Configurable Output: You can customize the behavior of the output pin via on-board jumpers (A and B) to suit specific logic requirements.
• Low Power Consumption: It consumes very little current in standby mode, making it an excellent choice for battery-powered portable devices.
• Auto-Calibration: The TTP223 IC automatically recalibrates itself to the environment, ensuring stable performance despite changes in temperature or humidity.
• Compact Form Factor: The tiny PCB footprint allows for seamless integration into space-constrained projects and control panels.

Technical Specifications:

• Operating Voltage (VCC): 2.0 V to 5.5 V DC
• Output Current (Max): ≈ 8 mA
• Response Time (Max): ≈ 60 ms in fast mode; ≈ 220 ms in low power mode
• Logic Level: TTL/CMOS Compatible
• Static Current: ≤ 3.0 μA (at 3 V with no load)
• Operating Temperature: −20°C to +70°C

Mechanical Specifications:

• Sensor Type: Capacitive Touch Detection
• PCB Material: High-quality FR-4 glass epoxy
• Mounting: Through-hole soldering pins for 2.54 mm headers
• Indicator: On-board LED provides immediate visual feedback when the sensor is triggered.

Dimensions:

• Length: ≈ 15.0 mm
• Width: ≈ 11.0 mm
• Thickness: ≈ 2.0 mm (PCB only)
• Weight: ≈ 1.0 g

Pinout and Wiring:

• VCC: Connect to the positive power supply (2.0 V to 5.5 V).
• GND: Connect to the circuit ground (0 V).
• I/O (SIG): Connect to the digital input of a microcontroller or a relay driver circuit.
• Jumper A (Output Level): Open for active-high output; closed for active-low output.
• Jumper B (Trigger Mode): Open for momentary trigger mode; closed for self-locking/toggle mode.

Datasheet Reference:

• Download TTP223 Touch Sensor IC Datasheet

Commonly Used in:

• Microcontroller Projects: Acts as a primary input device for Arduino, ESP32, and Raspberry Pi systems.
• Sealed Control Panels: Perfect for devices that require a completely flat, waterproof, or dustproof interface.
• Home Automation: Frequently used in touch-sensitive light switches and smart mirror controls.

Applications:

• Consumer Electronics: Replacing mechanical buttons in MP3 players, toys, and kitchen appliances.
• Industrial Controls: Providing a durable human-machine interface (HMI) in rugged environments.
• Proximity Detection: Sensing the presence of a hand or object without physical contact.

Equivalent Models:

• HTTM Series: A range of colorful capacitive touch modules that offer similar 3-pin operation.
• AT42QT1010: A specialized single-key touch sensor from Microchip that provides comparable high-reliability sensing.
• TTP224 / TTP226: Larger versions of this module that support 4-way or 8-way touch inputs respectively.

Package Includes:

• 1 x TTP223 Capacitive Touch Sensor Module (Red or Blue PCB)