CAP1188-1-CP-TR

Overview

The CAP1188-1-CP-TR is an 8-channel capacitive touch sensor IC with integrated LED drivers, manufactured by Microchip Technology. It operates on a 3V to 3.6V supply and draws up to 500µA during active sensing. The device features eight programmable touch inputs with automatic recalibration and eight open-drain or push-pull LED drivers capable of sinking or sourcing 24mA. It supports SMBus/I²C and SPI communication interfaces, selectable via the ADDR_COMM pin. Operating temperatures range from -40°C to 125°C in a 24-pin QFN package.

Feature Summary

• Eight individual capacitive touch sensor inputs with programmable sensitivity and automatic environmental recalibration.
• Eight LED driver outputs supporting full-on/off, variable blinking, dimming, and breathing functions linked to touch inputs.
• Multiple power states including Deep Sleep (5µA typical) and Standby modes with dedicated wake capabilities.
• Support for multiple pattern touch recognition and enhanced sensor proximity detection.

Applications

• Desktop and Notebook PCs
• LCD Monitors
• Consumer Electronics
• Appliances

Procurement Notes

Verify the specific suffix '-TR' indicates tape and reel packaging when ordering. Confirm the ADDR_COMM pin configuration matches the required communication protocol (SMBus/I²C or SPI). Ensure the host controller voltage levels are compatible with the device's 5V tolerant I/O pins. Check for any recent Product Change Notifications regarding assembly sites or labeling updates.

Selection Notes

Select this component for applications requiring simultaneous touch sensing and LED control without external drivers. Verify that the system design accommodates the 24-QFN package dimensions. Ensure the host processor supports either SMBus/I²C or SPI protocols as determined by the ADDR_COMM resistor selection. Consider thermal dissipation requirements if operating near maximum ambient temperatures.

Part Context

This part belongs to the CAP1188 family of RightTouch capacitive sensors. It integrates touch sensing and LED driving into a single chip, reducing bill-of-materials complexity compared to discrete solutions. The device is designed for low-power consumer electronics where space constraints and energy efficiency are critical design factors.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should verify compatibility with existing firmware and hardware layouts if considering alternative capacitive touch controllers from other manufacturers.