GreenTouchTM GT101L Capacitive Touch Sensor

1 The Classic of Touch Solution! GreenTouchTM GT101L . Capacitive Touch Sensor SPECIFICATION (Preliminary). GreenTouchTM Series GT101L . Capacitive Touch Sensor GENERAL BLOCK DIAGRAM. The GT101L is one of GreenTouchTM Capacitive Touch Sensor series. Especially the GT101L can do capacitance sensing under GreenTouchTM . engine operation. GreenTouchTM engine is an environmental compensation circuit. Thanks to GreenTouchTM engine, the application will be more robust and problem free against EMC, EMI, H/W variation, voltage disturbance, temperature drift, humidity drift and so on. The GT101L offers whole solutions for 1-ch Touch key applications, such as, normal mechanical switch replacements, liquid level Sensor , and so on.

2 Simple and easy application circuit can be also obtained by using GT101L . because of its fundamental algorithms and pin maps. The GT101L has not only digital Touch decision procedure that makes very reliable sensing determination but also smart algorithms that make it possible to detect initial Touch ( Touch state remaining from pre-reset condition). and slow action Touch (In case of other Touch Sensor slow action Touch is generally APPLICATIONS. compensated). Mechanical Switch Replacement Liquid Level Sensor Water purifier, Bidet, The GT101L has single Touch sensing input pin Humidifier Etc. and reference input pin to detect and determine Human Body Awareness Sensor Bidet Capacitive Touch , and single direct output pin seating Sensor , Industrial safety Sensor Etc.

3 Which has open drain structure and operates as PC, OA and Others - PC, LCD monitor, Fax, active low or toggle output function. Three Copy machine, Door lock, Lighting controls, connection types of CTRL pin make it possible Remote control, Toys, Gaming devices and to select two sensitivity options and toggle Etc. output function. Lighting system on/off key switch by using toggle output mode FEATURES. 1 channel cap. Sensing input ORDERING INFORMATION. Embedded GreenTouchTM Engine Part No. Package - Analog noise compensation circuit GT101L -ST6 SOT23 (6LD). - Embedded digital noise filter - Initial Touch detection algorithms - Slow Touch action detection algorithms - No sensitivity drift - Full digital Touch decision procedures Direct interface mode - Open drain and active low function Toggle output mode - It is possible by CTRL R-connection Low power consumption - 55uA - 35uA to single supply operation Mini package type - SOT23(6LD).

4 RoHS complaints January 2010 rev Product Preview GreenChip Inc. Confidential The Classic of Touch Solution! GreenTouchTM Series GT101L . Capacitive Touch Sensor REVISION HISTORY. Version Date Revision Contents PRELIMINARY November 2009 Preliminary release PRELIMINARY January 2010 Preliminary release Copyright 2009 by GreenChip Inc. - All Rights RESERVE. GreenChip owns all right, title and interest in the property and products described herein, unless otherwise indicated. No part of this document may be translated to another language or produced or transmitted in any form or by any information storage and retrieval system without written permission from GreenChip. GreenChip reserves the right to change products and specifications without written notice.

5 Customers are advised to obtain the latest versions of any product specifications. GREENCHIP MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, OF MERCHANTABILITY OR FITNESS. FOR A PARTICULAR PURPOSE, OTHER THAN COMPLIANCE WITH THE APPLICABLE GREENCHIP. SPECIFICATION SHEET FOR THE PRODUCT AT THE TIME OF DELIVERY. IN NO EVENT SHALL. GREENCHIP BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES AS A RESULT. OF THE PRODUCT'S PERFORMANCE OR FAILURE TO MEET ANY ASPECT OF SUCH SPECIFICATION. GREENCHIP PRODUCTS ARE NOT DESIGNED OR INTENDED FOR USE IN LIFE SUPPORT APPLIANCES, DEVICES OR SYSTEMS WHERE A MALFUNCTION OF A GREENCHIP DEVICE COULD RESULT IN A. PERSONAL INJURY OR LOSS OF LIFE. CUSTOMERS USING OR SELLING GREENCHIP DEVICES FOR.

6 USE IN SUCH APPLICATIONS DO SO AT THEIR OWN RISK AND AGREE TO FULLY INDEMNIFY. GREENCHIP FOR ANY DAMAGES RESULTING FROM SUCH IMPROPER USE OR SALE. Information contained herein is presented only as a guide for the applications of our products. GreenChip does not warrant this product to be free of claims of patent infringement by any third party and disclaims any warranty or indemnification against patent infringement. No responsibility is assumed by GreenChip for any patent infringement resulting from use of its products by themselves or in combination with any other products. No license is hereby granted by implication or otherwise under any patent or patent rights of GreenChip. The GreenChip logo is a registered trademark of GreenChip.

7 January 2010 rev Product Preview GreenChip Inc. Confidential The Classic of Touch Solution! GreenTouchTM Series GT101L . Contents Capacitive Touch Sensor GENERAL ---------------------------------------- ---------------------------------------- ------------------------------------ 2. FEATURES ---------------------------------------- ---------------------------------------- ---------------------------------- 2. BLOCK DIAGRAM ---------------------------------------- ---------------------------------------- ------------------------- 2. APPLICATIONS ---------------------------------------- ---------------------------------------- ---------------------------- 2. ORDERING INFORAMTION ---------------------------------------- ---------------------------------------- ------------ 2.

8 REVISION HISTORY ---------------------------------------- ---------------------------------------- ---------------------- 3. Chapter 1: Pinout Information 1-1 SOT23 (6LD) Pinout ---------------------------------------- ---------------------------------------- -------- 5. Chapter 2: Electrical Specification 2-1 Absolute Maximum Ratings ---------------------------------------- ---------------------------------------- -- 6. 2-2 DC & Operating Characteristics ---------------------------------------- ------------------------------------- 6. 2-3 ESD & Latch-Up Characteristics ---------------------------------------- ------------------------------------ 6. Chapter 3: Functional Description 3-1 Reset and Operating Current ---------------------------------------- ---------------------------------------- 7.

9 3-2 Basic Sensing Principle & Implementation of SIN, RIN ---------------------------------------- ------- 8. 3-3 Sensitivity and Output Mode Selection ---------------------------------------- ---------------------------- 10. 3-4 Output Interfaces ---------------------------------------- ---------------------------------------- ---------------- 10. Chapter 4: Application Notes 4-1 Circuit Examples for Various Applications ---------------------------------------- ------------------------ 11. 4-2 Application Notes ---------------------------------------- ---------------------------------------- --------------- 11. Chapter 5: Package Information 5-1 Package Outside Drawings ( GT101L -ST6) ---------------------------------------- -------------------- 13.

10 GreenChip Inc. Confidential 4 / 13. PINOUT INFORMATION GT101L . Chapter 1: Pinout Information This section describes the pin names and pin functions of GT101L . Pinout configuration also illustrated as below. The GT101L device is available in the following packages. SOT23 (6LD). Port Type Name Description Number Direct Output for Touch Detection 1 DO OUT. (Open Drain ). 2 PWR VDD Power Supply Voltage Input Sensitivity Selection Input - Connection to GND : Higher Sensitivity Option 3 DI CTRL - Connection to VDD : Lower Sensitivity Option Toggle Output Option Selection(CTRL R-connection) Input - Connect ion to GND via Resister (Over 500k to 1M ). 4 AI SIN Touch Sensing Input 5 GND GND Ground Pin 6 AI RIN Touch Sensing Reference Input * DI: Digital Input, DO: Digital Output, DIO: Digital Input and Output, AI: Analog Input, PWR: POWER.