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SC7020x User Manual
Low power single touch single output IC
Rev. 1.1
Please be reminded about following CMS's policies on intellectual property
＊Cmsemicron Limited (denoted as 'our company' for later use) has already applied for relative patents and entitled legal
rights. Any patents related to CMS's MCU or other products is not authorized to use. Any individual, organization or company
which infringes our company's interlectual property rights will be forbidden and stopped by our company through any legal
actions, and our company will claim the lost and required for compensation of any damage to the company.
＊ The name of Cmsemicron Limited and logo are both trademarks of our company
* Our company preserve the rights to further elaborate on the improvements about product functions, reliability and design in
this manual. However, our company is not responsible for any usage about this manual. The applications and their purposes in
this manual are just for clarification, our company does not guarantee that these applications are feasible without further
improvements and changes, and does not recommend any usage of the products in areas where people's safety is
endangered during accident. Our company's products are not authorized to be used for life-saving or life support devices and
systems. our company has the right to change or improve the product without any notification, for latest news, please visit our
website: www.mcu.com.cn
Please be reminded about following CMS's policies on intellectual property
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Related Manuals for Cmsemicon SC7020 Series
Summary of Contents for Cmsemicon SC7020 Series
- Page 1 SC7020x User Manual Low power single touch single output IC Rev. 1.1 Please be reminded about following CMS’s policies on intellectual property ＊Cmsemicron Limited (denoted as ‘our company’ for later use) has already applied for relative patents and entitled legal rights.
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Page 2: Table Of Contents
SC7020x Manual 1. PRODUCT DESCRIPTION ....................3 2. CHARACTERISTIC ....................... 3 3. PRODUCT SPECIFICATION ....................3 4. SYSTEM STRUCTURE DIAGRAM ..................4 5. PACKAGING AND PIN DESCRIPTION ................5 SC70201, SC70202 Pin Diagram ..........................5 SC70205 Pin Diagram ..............................6 6. -
Page 3: Product Description
SC7020x 1. Product Description SC7020x is a touch pad detector IC which offers 1 touch key. The device built-in voltage regulator circuit to provide a stable voltage for the touch sensing circuit, while the internal integration of efficient and perfect touch detection algorithm, so that the chip has a stable touch detection effect. The touching detection IC is designed for replacing traditional direct button key with wide operating voltage and low power consumption, which can widely meet the needs of different consumer applications 2. -
Page 4: System Structure Diagram
SC7020x 4. System Structure Diagram Sensor & Sensor Reference oscillator circuit detecting circuit QC/QD Timing counter & function option control Output & Touch circuit Driver circuit detecting circuit System oscillator circuit AHLB Regulator Key-on & circuit Timing control www.mcu.com.cn 4 / 12 Rev. -
Page 5: Packaging And Pin Description
SC7020x 5. Packaging and Pin Description SC70201, SC70202 Pin Diagram SC70201 SC70202 AHLB Pin Description: Pin name I/O type description CMOS output pin Negative power supply, ground Touch key sensor input pin Output QC active high or low selection AHLB I-PL 0(Default):Active high;... -
Page 6: Sc70205 Pin Diagram
SC7020x 5.2 SC70205 Pin Diagram Pin Description: Pin name I/O type description Open drain output pin Negative power supply, ground Touch key sensor input pin Output QC active high or low selection AHLB I-PL 0(Default):Active high; 1:Active low Positive power supply I-PL Output type selection 0 (Default): synchronous output;... -
Page 7: Function Description
SC7020x 6. Function Description 6.1 Output Mode and Pad Option The AHLB and TOG pads are latches: The default status is low. If the pads are connected to VDD before power-on, the status changes to high after power-on, and no current leakage occurs. TOG pad: Synchronous output or toggle output selection. -
Page 8: Sensitivity Adjustment
SC7020x 6.4 Sensitivity adjustment The equivalent capacitance on the IC touch pad will affect the sensitivity. So the sensitivity adjustment must according to the practical application on PCB. The SC7020x offers some methods for adjusting the sensitivity outside. By the touchpad size: Under other conditions are fixed. Using a larger touchpad size can increase sensitivity. -
Page 9: Application Circuit
SC7020x 7. Application circuit VDD VDD QC/QD AHLB 0.1uF SC7020x Figure 7-1: Schematic diagram of the circuit Note: On PCB, the length of lines from touch pad to IC pin shorter is better. And the lines do not parallel and cross with other lines. The power supply must be stable. -
Page 10: Electrical Characteristics
SC7020x 8. Electrical Characteristics 8.1 Limit Parameters of Electrical Characteristics Limit Parameters Parameter Symbol Conditions Rating Unit Supply Voltage -0 to +5.5 Input Voltage All I/O port -0.3 to VDD+0.3 ℃ Working temperature -40~ +85 ℃ Storage Temperature TSTG -50~ +125 Human Body Mode 8.2 DC Characteristics （VDD=2.0V~5.5, T... -
Page 11: Packaging
SC7020x 9. Packaging 9.1 SOT23-6 Millimeter Symbol 1.25 0.04 0.10 1.00 1.10 1.20 0.55 0.65 0.75 0.38 0.48 0.37 0.40 0.43 0.11 0.21 0.10 0.13 0.16 2.72 2.92 3.12 2.60 2.80 3.00 1.40 1.60 1.80 0.95BSC 1.90BSC 0.30 0.60 θ 8°... -
Page 12: Version Revision
SC7020x 10. Version Revision Revised content Version number Time V1.0 May, 2020 Original version Dec, 2021 V1.1 Delete some chip products www.mcu.com.cn 12 / 12 Rev. 1.1...
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