MTCH102/105/108 2, 5 and 8-Channel Proximity/Touch Controller Product Brief Description The Microchip mTouch® MTCH102/105/108 Proximity/Touch Controller with simple digital output provides an easy way to add proximity and/or touch detection to any application. This device family implements capacitive sensors with active guarding capability. The sensitivity and power mode can be configured through the MTSA and MTPM pins. The MTCH102/105/108 devices also use an advanced optimization algorithm to actively suppress noise from the signal to achieve reliable proximity/touch detection. Features Application • Capacitive Proximity and Touch Detection System: - High Signal to Noise Ratio (SNR) - Adjustable sensitivity with compensation for different sensor sizes - Multi-stage Active noise suppression filters - Automatic environmental compensation - Support for wide range of sensor shape and size • Simple I/O Interface with existing System • Smart Scan Scheduling • Threshold Hysteresis • Flexible Low-Power mode • Brown-Out Protection • Operating Voltage Range: 2.05V to 3.6V • Operating Temperature: -40°C to +85°C • • • • • TABLE 1: Light Switch Portable Device Enabler White Goods and Appliance Office Equipment and Toys Display and Keypad Back-Lighting Activation MTCH10X FAMILY TYPES Device Data Sheet Index Sensor Input Active Guard Digital Output (A) 1 N 1 MTCH102 (B) 2(1) Y(1) 2 MTCH105 (B) 5(1) Y(1) 5 (B) (1) (1) 8 MTCH101 MTCH108 Note 1: 8 Y One of the sensor inputs can be configured as active guard output. Data Sheet Index: (Unshaded devices are described in this document.) A: B: Note: TABLE 2: DS-40001664 Future Release MTCH101 Single-Channel Proximity Detector MTCH102/105/108 Dual-Channel Proximity/Touch Controller For other small form-factor package availability and marking information, please visit http://www.microchip.com/packaging or contact your local sales office. PACKAGES Packages MSOP MTCH102 MTCH105 MTCH108 2015 Microchip Technology Inc. TSSOP SSOP X UDFN QFN X X X X Advance Information X DS40001780A-page 1 MTCH102/105/108 8-LEAD SOIC, DFN MTI0 MTCH102 VDD 1 2 MTI1/Guard 3 4 MTPM 8 VSS 7 MTO0 6 MTO1/GC 20-LEAD TSSOP VDD 1 20 VSS MTI0 2 19 MTO0 18 MTO1 17 MTSA 16 MTO2/GC 15 MTO3 7 14 MTO4 8 13 MTO5 9 12 MTO6 10 11 MTO7 MTI1 3 MTPM 4 MTI2/Guard 5 MTI3 MTI4 5 MTSA MTI5 MTI6 MTI7 Note: See Table 3 for the pin allocation table. FIGURE 2: VSS 2 13 MTO0 MTI1 3 12 MTO1 11 MTSA MTO2/GC 5 10 MTI3 6 9 MTO3 MTI4 7 8 MTO4 20 19 18 17 16 Note: See Table 4 for the pin allocation table. MTCH108 15 14 13 12 11 MTO1 MTSA MTO2/GC MTO3 MTO4 Note: See Table 5 for the pin allocation table. 16 15 14 13 NC VSS 16-LEAD QFN VDD NC FIGURE 3: 1 2 3 4 5 6 7 8 9 10 MTI2/ Guard MTPM MTI2/Guard MTI3 MTI4 MTI5 MTI6 MTI7 MTO7 MTO6 MTO5 MTPM 4 MTCH105 MTI0 20-LEAD QFN MTI1 14 1 VDD 6 Note: See Table 5 for the pin allocation table. FIGURE 5: 14-LEAD SOIC MTCH108 FIGURE 1: FIGURE 4: MTI0 VDD VSS MTO0 PIN DIAGRAMS 1 2 3 4 MTCH105 12 11 10 9 MTO0 MTO1 MTSA MTO2/GC MTI3 MTI4 MTO4 MTO3 5 6 7 8 MTI0 MTI1 MTPM MTI2/Guard Note: See Table 4 for the pin allocation table. DS40001780A-page 2 Advance Information 2015 Microchip Technology Inc. MTCH102/105/108 PIN ALLOCATION TABLES TABLE 3: Name 8-PIN DESCRIPTION (MTCH102) 8-Lead SOIC and DFN 1 VDD Description Power Supply Input MTI0 2 Proximity/Touch Sensor 0 Input MTI1/Guard 3 Proximity/Touch Sensor 1 Input/Active Guard MTPM 4 Low-Power Mode Select MTSA 5 Sensitivity Adjust Input MTO1/GC 6 MTI1 Detect Output (Active-Low)/Guard Control MTO0 7 MTI0 Detect Output (Active-Low) VSS 8 Ground TABLE 4: Name 14-,16-PIN DESCRIPTION (MTCH105) 14-Lead SOIC 16-Lead QFN Description VDD 1 16 Power Supply Input MTI0 2 1 Proximity/Touch Sensor 0 Input MTI1 3 2 Proximity/Touch Sensor 1 Input MTPM 4 3 Low-Power Mode Select MTI2/Guard 5 4 Proximity/Touch Sensor 2 Input/Active Guard MTI3 6 5 Proximity/Touch Sensor 3 Input MTI4 7 6 Proximity/Touch Sensor 4 Input MTO4 8 7 MTI4 Detect Output (Active-Low) MTO3 9 8 MTI3 Detect Output (Active-Low) MTO2/GC 10 9 MTI2 Detect Output (Active-Low) /Guard Control MTSA 11 10 Sensitivity Adjust Input MTO1 12 11 MTI1 Detect Output (Active-Low) MTO0 13 12 MTI0 Detect Output (Active-Low) VSS 14 13 Ground 2015 Microchip Technology Inc. Advance Information DS40001780A-page 3 MTCH102/105/108 TABLE 5: 20-PIN DESCRIPTION (MTCH108) 20-Lead TSSOP 20-Lead QFN VDD 1 18 Power Supply Input MTI0 2 19 Proximity/Touch Sensor 0 Input MTI1 3 20 Proximity/Touch Sensor 1 Input Name Description MTPM 4 1 Low-Power Mode Select MTI2/Guard 5 2 Proximity/Touch Sensor 2 Input/Active Guard MTI3 6 3 Proximity/Touch Sensor 3 Input MTI4 7 4 Proximity/Touch Sensor 4 Input MTI5 8 5 Proximity/Touch Sensor 5 Input MTI6 9 6 Proximity/Touch Sensor 6 Input MTI7 10 7 Proximity/Touch Sensor 7 Input MTO7 11 8 MTI7 Detect Output (Active-Low) MTO6 12 9 MTI6 Detect Output (Active-Low) MTO5 13 10 MTI5 Detect Output (Active-Low) MTO4 14 11 MTI4 Detect Output (Active-Low) MTO3 15 12 MTI3 Detect Output (Active-Low) MTO2/GC 16 13 MTI2 Detect Output (Active-Low)/Guard Control MTSA 17 14 Sensitivity Adjust Input MTO1 18 15 MTI1 Detect Output (Active-Low) MTO0 19 16 MTI0 Detect Output (Active-Low) VSS 20 17 Ground PIN DESCRIPTION GC MTIx By grounding the GC pin, the active guard signal will be enabled on the Guard pin. Connect the sensor to this input. An additional resistor of at least 4.7 kΩ is recommended for high-frequency noise immunity. MTSA GUARD The waveform on the Guard pin will shield or guard MTIx’s sensor from the effect of nearby noise sources or power planes if the guard trace surrounds MTIx’s trace and sensor. The Guard pin will be driven in phase with MTIx to minimize the voltage difference between the two pins. MTOx The MTOx pin is an open-drain output, which reports the proximity/touch state of MTIx. A pull-up resistor is required, and it will pull the line low when proximity/ touch is detected, and release the line when proximity/ touch is released. DS40001780A-page 4 The voltage will determine the sensitivity. VDD voltage will give the lowest sensitivity while GND voltage will give the highest. A linear voltage sensitivity is implemented between VDD and GND. A resistor ladder is used to adjust the sensitivity. MTPM By grounding the MTPM pin, the MTCH102/105/108 will be in Low-Power mode, thus having a slower response time. When the MTPM pin is at VDD, the power consumption will be higher with a faster response time. Advance Information 2015 Microchip Technology Inc. MTCH102/105/108 TYPICAL CIRCUIT FIGURE 6: SYSTEM DIAGRAM FOR MTCH10X VDD MTO0 MTIx MTOx …... MTPM …... Touch Sensor MTI0 …... Touch Sensor Embedded Controller Dd/ͬ'ƵĂƌĚ;ϭͿ Active Guard DdKͬ';ϮͿ MTSA Dd,ϭϬϮͬϭϬϱͬϭϬϴ Note 1: 2: MTI1/Guard for MTCH102 and MTI2/Guard for MTCH105/108. MTO1/GC for MTCH102 and MTO2/GC for MTCH105/108. 2015 Microchip Technology Inc. Advance Information DS40001780A-page 5 Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. 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All other trademarks mentioned herein are property of their respective companies. © 2015, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. ISBN: 978-1-63277-013-4 QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV == ISO/TS 16949 == DS40001780A-page 6 Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. Advance Information 2015 Microchip Technology Inc. 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Advance Information DS40001780A-page 7