The packaging uses materials from Tape & Reel (TR). For mounting on the PCB, Surface Mount is used. Despite its low package costs, 20-VFQFN Exposed Pad enjoys a significant amount of popularity in the electronic industry. In order for it to operate normally, it requires the 1.8V~5.5V Supply Voltage. There is a need to use inputs of Up to 4. Standard grade applications belong to Type Buttons. In order for it to operate properly, it should always have a temperature of -40°C~85°C. Featuring the best cost-down performance ratio on the market, the QTouch? Series is the most cost-effective option. A supply current of 10mA is provided to this system. A LED driver's channel is 4. This is constructed by terminating 20. An 3.3V volt supply powers the component at all times. There must be more voltage present in the supply, Vsup, than volts consumed, 1.8V. At Vsup, maximum Supply Voltage (5.5V) is reached.

20-VFQFN Exposed Pad package
4 LED driver channels

There are a lot of Microchip Technology AT42QT1040-MMHR Capacitive Sensors applications.

• High-resolution Metal Profling

  
  

• White goods

  
  

• Rain, Fog, Ice, Snow Sensor

  
  

• Automotive Door and Kick Sensors

  
  

• Mobile Appliances

  
  

• Television, audio/video

  
  

• Proximity Sensor

  
  

• Gaming devices

  
  

• Kiosks and POS terminals

  
  

• Remote Control Trackpads

  
  

  Factory Lead Time	7 Weeks
  Lifecycle Status	Production (Last Updated: 2 years ago)
  Mounting Type	Surface Mount
  Package / Case	20-VFQFN Exposed Pad
  Surface Mount	YES
  Supplier Device Package	20-VQFN (3x3)
  Number of Terminals	20
  Supplier Package	VQFN
  Number of Keys	4
  Mounting	Surface Mount
  Package	Tape & Reel (TR);Cut Tape (CT);Digi-Reel®;
  Base Product Number	AT42QT1040
  Mfr	Microchip Technology
  Product Status	Active
  Schedule B	8542310000
  RoHS	Non-Compliant
  MSL	-
  Maximum Operating Temperature	+ 85 C
  Minimum Operating Temperature	- 40 C
  Interface Type	I2C
  Manufacturer	Microchip
  Brand	Microchip Technology / Atmel
  Package Shape	SQUARE
  Operating Temperature	-40°C~85°C
  Packaging	Tape & Reel (TR)
  Series	QTouch™
  Published	1997
  Part Status	Active
  Moisture Sensitivity Level (MSL)	3 (168 Hours)
  Number of Terminations	20
  Type	Buttons
  Max Operating Temperature	85 °C
  Min Operating Temperature	-40 °C
  Subcategory	Sensors
  Voltage - Supply	1.8V~5.5V
  Terminal Position	QUAD
  Terminal Form	NO LEAD
  Number of Functions	1
  Supply Voltage	3.3V
  Terminal Pitch	0.45 mm
  Reach Compliance Code	compliant
  Pin Count	20
  Termination Style	SMD/SMT
  JESD-30 Code	S-XQCC-N20
  Operating Supply Voltage	1.8, 5.5 V
  Supply Voltage-Max (Vsup)	5.5V
  Temperature Grade	INDUSTRIAL
  Supply Voltage-Min (Vsup)	1.8V
  Number of Channels	4
  Interface	--
  Max Supply Voltage	5.5 V
  Min Supply Voltage	1.8 V
  Analog IC - Other Type	ANALOG CIRCUIT
  Load Capacitance	20 pF
  Current - Supply	10mA
  Number of Inputs	Up to 4
  Seated Height-Max	0.85 mm
  Resolution	--
  Product Type	Touch Sensors
  Sensor Type	Button, Slider, Proximity
  Screening Level	Industrial
  Proximity Detection	No
  Supply Current	800 uA
  LED Driver Channels	4
  Product Category	Capacitive Touch Sensors
  Length	3mm
  Height Seated (Max)	0.85mm
  Width	3mm
  Height	850 µm
  RoHS Status	ROHS3 Compliant