IQS227B00400008TSR

Overview

The IQS227B00400008TSR is a single-channel capacitive proximity and touch controller from the ProxSense series. It features an internal voltage regulator and reference capacitor, utilizing a charge transfer method for sensing. The device provides dedicated outputs for proximity (POUT) and touch (TOUT) events, supporting I2C data streaming. It operates within a supply voltage range of 1.8 V to 3.6 V and functions across a temperature range of -40°C to +85°C. Configuration is managed via One Time Programmable (OTP) options, allowing selection of power modes, output logic, and sensitivity thresholds.

Feature Summary

• Automatic Tuning Implementation (ATI) for self-calibration of sense electrodes
• Dual digital outputs for independent proximity and touch event signaling
• Configurable output modes including active, latch, and toggle states
• Support for I2C data streaming on output pins

Applications

• On-ear detection and touch keys in GSM cellular telephones
• Backlighting activation and wake-up from standby in LCD/LED displays
• Human interface devices in hazardous or flameproof environments
• Replacement for electromechanical switches in white goods and appliances

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and pre-programmed OTP configuration. Ensure compatibility with system voltage requirements, as this variant supports the lower voltage range. Confirm RoHS compliance status through official documentation prior to integration.

Selection Notes

Select this component for applications requiring a single-channel solution with distinct proximity and touch detection capabilities. Consider the TSOT-23-6 package for space-constrained designs. Evaluate the required output behavior to determine if active, latch, or toggle modes are necessary for the host system interface.

Part Context

This part belongs to the Azoteq IQS227B/D family, which includes variants like the IQS227D supporting higher voltages. The IQS227B specifically targets low-voltage portable electronics. Evaluation kits such as the IQS227/8BEV01-S are available for development purposes.

Replacement Considerations

The IQS227D offers similar functionality but supports a wider supply voltage range of 2.4 V to 5.5 V. Verify pinout compatibility and OTP configuration differences before substitution.