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SX8643, SX8644, SX8645, SX8646, SX8647, SX8648 and SX8649 – World’s Lowest Power, Fully Integrated Capacitive Touch Sensor IC Platform

 

Semtech SX8643

Ultra Low Power, Capacitive Button Touch Controller (12 sensors) with Enhanced LED Drivers

Overview:

The SX8643 is an ultra low power, fully integrated 12-channel solution for capacitive touch-buttons and applications. Unlike many capacitive touch solutions, the SX8643 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports GPIO).

Features:

• Complete 12 Sensors Capacitive Touch Controller for Buttons
• • Pre-configured for eight Buttons
  • Eight LED Drivers with Individual Intensity, Fading
  • Control and Autolight Mode
  • 256 steps PWM Linear and Logarithmic control
• High Resolution Capacitive Sensing
• • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power Optimized for Portable Application
• • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 175uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• 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

Applications:

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

Diagram:

 

Semtech SX8644

Ultra Low Power, Capacitive Button and Slider Touch Controller (12 sensors) with Enhanced LED Drivers

Overview:

The SX8644 is an ultra low power, fully integrated 12-channel solution for capacitive touch-buttons and slider applications. Unlike many capacitive touch solutions, the SX8644 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO).

Features:

• Complete 12 Sensors Capacitive Touch Controller for
• • Buttons and Slider
  • • Pre-configured for 6 Buttons and a Slider
    • 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
    • 256 steps PWM Linear and Logarithmic control
• High Resolution Capacitive Sensing
• • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power Optimized for Portable Application
• • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 220uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• 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

Applications:

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

Diagram:

Semtech SX8645

Ultra Low Power, Capacitive Button and Slider Touch Controller (12 sensors) with Enhanced LED Drivers

Overview:

The SX8645 is an ultra low power, fully integrated 12-channel solution for capacitive touch-buttons and wheel applications. Unlike many capacitive touch solutions, the SX8645 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO).

Features:

• Complete Twelve Sensors Capacitive Touch Controller for
• Buttons and Wheel
• High Resolution Capacitive Sensing
• Extremely Low Power Optimized for Portable Application
• Programmable Scanning Period from 15ms to 1500ms
• Auto Offset Compensation
• Multi-Time In-Field Programmable Firmware Parameters for Ultimate Flexibility
• “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

Applications:

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

Diagram:

 

Semtech SX8646

Ultra Low Power, Capacitive Button Touch Controller (8 sensors) with Enhanced LED Drivers

Overview:

The SX8646 is an ultra low power, fully integrated 8- channel solution for capacitive touch-buttons and applications. Unlike many capacitive touch solutions, the SX8646 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO).

Features:

• Complete 8 Sensors Capacitive Touch Controller for
• • Buttons
  • • Pre-configured for eight Buttons
    • Eight LED Drivers with Individual Intensity, Fading
    • Control and Autolight Mode
    • 256 steps PWM Linear and Logarithmic control
• High Resolution Capacitive Sensing
• • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power Optimized for Portable Application
• • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 175uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• 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

Applications:

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

Diagram:

 

Semtech SX8647

Ultra Low Power, Capacitive Wheel Touch Controller (8 sensors) with Enhanced LED Drivers

Overview:

The SX8647 is an ultra low power, fully integrated 8-channel solution for capacitive touch wheel applications. Unlike many capacitive touch solutions, the SX8647 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO.

Features:

• Complete 8 Sensors Capacitive Touch Controller for
• • Wheel
  • • Pre-configured for a Wheel
    • 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
    • 256 steps PWM Linear and Logarithmic control
• High Resolution Capacitive Sensing
• • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power Optimized for Portable Application
• • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 175uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• 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

Applications:

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

Diagram:

Semtech SX8648

Ultra Low Power, Capacitive Button and Slider Touch Controller (8 sensors) with Enhanced LED Drivers

Overview:

The SX8648 is an ultra low power, fully integrated 8-channel solution for capacitive touch-buttons and slider applications. Unlike many capacitive touch solutions, the SX8648 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO).

Features:

• Complete 8 Sensors Capacitive Touch Controller for
• • Buttons and Slider
  • • Pre-configured for 2 Buttons and a Slider
    • 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
    • 256 steps PWM Linear and Logarithmic control
• High Resolution Capacitive Sensing
• • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power Optimized for Portable Application
• • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 175uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• 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

Applications:

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

Diagram:

Semtech SX8649

Ultra Low Power, Capacitive Button and Wheel Touch Controller (8 sensors) with Enhanced LED Drivers

Overview:

The SX8649 is an ultra low power, fully integrated 8-channel solution for capacitive touch-buttons and wheel applications. Unlike many capacitive touch solutions, the SX8649 features dedicated capacitive sense inputs (that requires no external components) in addition to 8 general purpose I/O ports (GPIO).

Features:

• Complete 8 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
• High Resolution Capacitive Sensing
• • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power Optimized for Portable Application
• • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 175uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• 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

Applications:

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

Diagram:

 

 

 

 

 

 

Source: SEMTECH

 

 

Press Release:

Semtech Debuts World’s Lowest Power, Fully Integrated Capacitive Touch Sensor IC Platform

Semtech Corp. (Nasdaq: SMTC), a leading supplier of analog and mixed-signal semiconductors, today announced the SX864x platform of capacitive sensing ICs that come in 8- and 12-channel models and feature integrated LED drivers. This platform supports a wide range of button, slider and touch wheel capacitive sensor designs that are increasingly found in white goods, mobile phones, media players, notebooks/netbooks and other consumer electronics.

The capacitive analog interface on each of the seven ICs in the SX864x platform is designed with a highly accurate ADC that provides superior sensitivity to work with overlay materials more than 5mm thick, offering extremely robust and ESD-immune system design. With current consumption as little as 80uA at operation, these ICs are the ideal choice for battery-powered devices. This SX864x platform also integrates eight, 256-step LED drivers with individual intensity and linear and logarithmic fading control that is optimized for human vision.

The SX864x devices are specifically designed to reduce capacitive touch control design time-to-market. Users may customize various parameters such as scan time, slave address, channel gain and sensitivity thresholds in their applications without the need for new firmware development. False triggers due to environmental factors such as temperature, humidity and dust can also be eliminated via our on-chip calibration algorithm.

“Unlike competitive alternatives, the SX864x family integrates all the functional blocks necessary for capacitive sensing in a tiny footprint that requires zero external components. This simplifies the PCB design and reduces the overall solution BOM cost,“ said Sam Massih, Product Line Manager, Consumer Analog Products for Semtech. “The integrated, advanced features of the SX864x platform coupled with their low power consumption, makes these ICs ideal for a wide range of capacitive sensing applications.”

The devices in the SX864x platform include the 12-channel SX8643/44/45, which are offered in 5mm x 5mm 32-QFN packages; and the 8-channel SX8646/47/48/49 that come in 4mm x4mm 28-QFN packages. Semtech guarantees all of these devices to operate over the extended (-40°C to +85°C) temperature range.
Key Features of the SX864x Platform

• Capacitive touch sensor platform for button, slider and wheel control applications; includes eight independent, 256-step LED drivers with auto-lightening mode and individual intensity and fading control
• High-resolution capacitive sensing (able to sense thru overlay materials up to 5mm thick)
• Low power optimized for battery-powered applications: 175uA (typ) in active mode; 80uA (typ) in doze mode and 8uA (typ) in sleep mode
• Auto offset compensation eliminates false triggers due to environmental factors
• Zero external components per sensor input
• Multi-time In-field programmable firmware parameters for ultimate flexibility

Pricing and Availability

The 12-channel SX8643 (order code: SX8643I05AWLTRT), SX8644 (order code: SX8644I05AWLTRT) and SX8645 (order code: SX8645I05AWLTRT) are available in production quantities and are priced at $0.94, $0.99 and $1.02 respectively in 3,000-piece lots. The 3,000-piece price for the smaller pin-count 8-channel SX8646 (order code: Sx8646I05AULTRT), SX8647 (order code: Sx8647I05AULTRT), SX8648 (order code: Sx8648I05AULTRT) and SX8649 (order code: Sx8649I05AULTRT) are $0.89, $0.93, $0.94 and $0.98 respectively. Semtech offers comprehensive design assistance, including field- and factory-based support. Data sheets, volume pricing, and delivery quotes, as well as evaluation kits and samples, are available by contacting http://www.semtech.com/info.

About Semtech

Semtech Corporation is a leading supplier of analog and mixed-signal semiconductors for high-end consumer, computing, communications and industrial equipment. Products are designed to benefit the engineering community as well as the global community. The company is dedicated to reducing the impact it, and its products, have on the environment. Internal green programs seek to reduce waste through material and manufacturing control, use of green technology and designing for resource reduction. Publicly traded since 1967, Semtech is listed on the NASDAQ Global Select Market under the symbol SMTC. For more information, visit www.semtech.com.

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