SX8639 Series 8 Sensor Low Power Capacitive Button Touch Controller - MLPQ-28

Mfr Part#: SX8639I05AULTRT
Mounting Method:  Surface Mount
Package Style:  MLPQ-28
Packaging:  Cut Tape
Std Packaging Qty:  3,000



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$2.44 USD (each)
1 - 249 $2.44
250 - 499 $1.91 (Save 22%)
500 - 749 $1.85 (Save 24%)
750 - 1499 $1.82 (Save 25%)
1500+ $1.71 (Save 30%)


Qty in Stock :   96
Factory Stock : N/A
Factory Lead-Time: N/A
Min. Order Qty: 1
Multiple of: 1
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Product Highlight

  • Type: Capacitive
  • Output Type: Digital Output
  • Supply Voltage: 2.7 to 3.6 V
  • Supply Current: 10 mA

The SX8639 is an ultra low power, fully integrated 8-channel solution for capacitive touch-buttons and wheel with proximity detection applications.

Unlike many capacitive touch solutions, the SX8639 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO). Each GPIO is typically configured as LED driver with independent PWM source for enhanced lighting control such as intensity and fading.


  • Complete Eight Sensors Capacitive Touch Controller for Buttons and Wheel
    • Pre-configured for 4 Buttons and a Wheel
    • 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
    • 256 steps PWM Linear and Logarithmic control
  • Proximity Sensing up to several centimeters
  • High Resolution Capacitive Sensing
    • Up to 100 pF of Offset Capacitance Compensation at Full Sensitivity
    • Capable of Sensing through Overlay Materials up to 5mm thick
  • Extremely Low Power Optimized for Portable Application
    • 8 uA (typ) in Sleep Mode
    • 80 uA (typ) in Doze Mode (Scanning Period 195 ms)
    • 175 uA (typ) in Active Mode (Scanning Period 30 ms)
  • Programmable Scanning Period from 15ms to 1500 ms
  • Auto Offset Compensation
    • Eliminates False Triggers due to Environmental Factors (Temperature, Humidity)
    • Initiated on Power-up and Configurable Intervals
  • Multi-Time In-Field Programmable Firmware Parameters for Ultimate Flexibility
    • On-chip user programmable memory for fast, self contained start-up
  • "Smart" Wake-up Sequence for Easy Activation from Doze
  • No External Components per Sensor Input
  • Internal Clock Requires No External Components
  • Differential Sensor Sampling for Reduced EMI
  • 400 KHz Fast-Mode I²C Interface with Interrupt
  • -40°C to +85°C Operation


  • Notebook/Netbook/Portable/Handheld computers
  • Cell phones, PDAs
  • Consumer Products, Instrumentation, Automotive
  • Mechanical Button Replacement

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Future Electronics offers this product to be custom packaged onto our production ready Mini-Reels.

Select the number of reels you require and the quantity of components to be placed on each reel.
1 is the minimum quantity and 96 is the maximum quantity that can go on this Mini-Reel.
Number of Reels
Number of Components
No. of
Quantity per Reel Unit Price
inc. Reeling fee
Ext. Price
inc. Reeling fee
1 1 $9.4400 USD $9.44 USD
$7.00 reeling fee is amortized over the number of components to each reel. Mini-Reels are custom product and are non-cancelable and non-returnable