CAP1133-1-AIA-TR

Overview

The CAP1133-1-AIA-TR is a capacitive touch sensor IC featuring three individual sensor inputs and three LED drivers. It operates on a 3V to 3.6V supply with typical standby current of 50µA and deep sleep current of 5µA. The device supports SMBus/I2C communication at up to 400kHz, offers programmable sensitivity, automatic recalibration, proximity detection, and multiple pattern touch recognition. LED drivers support open-drain or push-pull configurations with up to 24mA drive capability.

Feature Summary

• Three capacitive touch sensor inputs with programmable sensitivity and automatic recalibration
• Three LED drivers supporting full-on/off, blinking, dimming, and breathing modes
• SMBus/I2C compliant communication interface for host controller integration
• Multiple power states including active, standby, and deep sleep for low power operation

Applications

• Desktop and notebook PCs
• LCD monitors
• Consumer electronics
• Appliances

Procurement Notes

Verify the complete part number including suffixes against official Microchip documentation to ensure correct package type and temperature range. Confirm that the ordering suffix matches the required reel quantity and RoHS compliance status. Cross-reference the datasheet revision to ensure compatibility with existing design specifications.

Selection Notes

Select this component when designing systems requiring multi-touch sensing with integrated LED control. Ensure the host controller supports SMBus or I2C protocols. Verify that the operating voltage range of 3V to 3.6V aligns with the system power supply. Consider the 10-pin DFN package dimensions for PCB layout constraints.

Part Context

The CAP1133 belongs to Microchip's RightTouch family of capacitive touch sensors. It is designed for applications requiring simple integration of touch controls with visual feedback via LEDs. The device simplifies design by combining sensing and driving capabilities in a single small package.

Replacement Considerations

Consult Microchip's official documentation for direct replacements or pin-compatible alternatives within the RightTouch family. Verify functional equivalence regarding sensor count, LED driver capabilities, and communication interfaces before substitution.

FAQ

What are the available power states for the CAP1133?

The CAP1133 offers three power states: Fully Active, Standby, and Deep Sleep. Standby allows monitoring of one or more channels with low quiescent current, while Deep Sleep draws minimal current (5µA typical) with no sensor inputs active.

How does the CAP1133 handle environmental changes?

Each sensor input automatically recalibrates to compensate for gradual environmental changes. The device can also be configured for manual recalibration or negative delta count recalibration to maintain sensitivity in noisy environments.

Can the LED drivers be controlled independently of the touch sensors?

Yes, each LED driver can be linked to its corresponding capacitive touch sensor input or individually controlled via the host controller using the SMBus/I2C interface.