TTP223 Single Channel Touch Detector IC

4 November 2020 - 0 Comments

TTP223 Touch Controller IC

TTP223 Pinout

TTP223 is asingle channel touch detector ICthat could be used as a 1 touch key driver. It is a useful interface when replaced with a traditional button key. It has alow power consumptionwith a wide range of operating voltage. It has an auto calibration feature for life and it has a re-calibration period of about 4.0 seconds. The sensitivity can be adjusted using an external capacitor of 0 to 50 pF.

Pin Description of TTP223

Pin Number	Pin Name	Description
1	Q	CMOS output pin
2	VSS	Power Supply negative pin
3	I	Input of the Sensor Port
4	AHLB	Outputactive high or low
5	VDD	Power Supply Positive pin
6	TOG	Output type option pin

The pinout is shown in the below image-

TTP223 Pin Description

Features and Specification of TTP223

单道通道触摸键传感
2.0V - 5.0V Operating Voltage
操作电流1.5UA通常。低功率模式下的最大工作电流3.0UA。
Response time - 220ms at low power mode.
Adjustable sensitivity using external capacitor (0-50 pF)
Stable touch detection of human body
All output modes can be configurable for high or active low by pad options.
Direct mode and Toggle mode selection pin available

Note: Complete technical details can be found in theTTP223Datasheet链接在此页面的底部。

Alternative product ofTTP223

The otheralternatives for TTP223are listed below.

CAP1203
TTP226
TTP229

TTP223 Touch controller IC - Overview

TTP223触摸控制器is the exact non-contact alternative to traditional button switches. The IC uses an onboard sense pad that uses copper trace as a touch element and the touch sensitivity can be configured using an additional external capacitor ranging from 0 to 50pF.

There are two pins, AHLB and TOG that could be used to configure the output state either high or low or toggle mode enable option. The configurable output is set by those two pins as per the below chart.

TTP223 Touch Controller IC Overview

It is available in SMD, SOT23-6L package.

接口图以及如何使用TTP223

The below image is showing standard 2.2-5V interfacing of the touch sensor. It requires basic components followed by a sense pad.

TTP223接口图

As we can see, the sense pad is connected to the Input pin and two-slide switches are given to select the configuration of TOG and AHLB. The C1 can be configurable as per the required sensitivity.

Follow the below guidelines for PCB design related purposes-

Place the Sense pad as close as possible to the IC
Do not use mechanical enclosure
Use proper filter and bypass capacitor to reduce noises or ripple in the input supply
Place the capacitor C2 as close as possible.
使用X7R或NPO额定电容器，以便在较宽的温度下更准确。