QT60168-ASG

Overview

The QT60168-ASG is a 16-key capacitive touch controller utilizing second-generation QMatrix technology. It operates on a single +3V to +5V supply and features an SPI slave interface for host communication. The device supports key sensitivity, response time, and other parameters via onboard EEPROM storage. It includes adaptive auto self-calibration, drift compensation, and FMEA diagnostics. Operating temperature range is -40°C to +105°C in a 32-pin lead-free TQFP package.

Feature Summary

• Transverse charge-transfer sensing enables detection through dielectrics up to 50mm thick
• Integrated adaptive auto self-calibration ensures robust operation under environmental changes
• Continuous FMEA self-test reporting supports critical safety applications
• Spread-spectrum modulation provides high noise immunity against EMI

Applications

• Automotive panels
• Machine tools
• ATM machines
• Appliance controls
• Security keypads

Procurement Notes

Verify the specific ASG suffix indicates lead-free compliance and the extended industrial temperature range (-40°C to +105°C). Confirm the 32-pin TQFP package dimensions match the design footprint. Ensure the host microcontroller supports the required SPI protocol for command execution and data retrieval.

Selection Notes

Select this model when exactly 16 keys are required within the 8x3 matrix grid. Use the QT60248 if more than 16 keys are needed, as both share identical electrical characteristics. Consider the QT60168 for designs requiring sealed, watertight panels immune to humidity or vandalism.

Part Context

This component belongs to the QProx QT60xx8 series of digital charge-transfer sensors. It shares the same core architecture and functionality as the QT60248, differing only in the maximum number of supported keys (16 vs 24). Both devices utilize the same transverse charge-transfer technology for matrix-based touch control.

Replacement Considerations

The QT60248 is electrically identical but supports up to 24 keys. Unused keys on the QT60248 can be disabled to function as a 16-key solution. No other direct substitutes are documented in the provided datasheet.