CAP1298-1-SL

Overview

The CAP1298-1-SL is an eight-channel capacitive touch sensor controller manufactured by Microchip Technology. It operates on a 3V to 5.5V supply and communicates via SMBus or I2C interfaces. The device features programmable sensitivity, automatic recalibration for parasitic capacitance, and proximity detection with signal guard capabilities. It supports multiple power states including Active, Standby, Combo, and Deep Sleep, with typical quiescent current of 5µA in Deep Sleep. The component is housed in a 14-pin SOIC package and functions within an operating temperature range of -40°C to 125°C.

Feature Summary

• Eight individual capacitive touch sensor inputs with programmable sensitivity and automatic recalibration
• Proximity detection capability with optional signal guard to reduce noise sensitivity
• Multiple pattern touch recognition allowing simultaneous button detection with interrupt generation
• Low power operation with Deep Sleep state drawing 5µA typical current

Applications

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

Procurement Notes

Verify the specific suffix 'SL' against official documentation to confirm package type and RoHS compliance status. Ensure compatibility with host controller voltage levels, as digital pins are 5V tolerant. Confirm availability of pull-up resistors for SMBus/I2C lines. Check for any recent Product Change Notifications regarding assembly or labeling updates.

Selection Notes

Select this component when eight independent touch channels are required alongside proximity sensing. The 14-pin SOIC package suits applications needing surface mount integration without QFN constraints. Consider the Combo state functionality if simultaneous button and proximity monitoring is necessary. Verify that the system design accommodates the required thermal vias for optimal heat dissipation.

Part Context

The CAP1298 belongs to Microchip's RightTouch capacitive touch sensor family. It shares functional similarities with models like CAP1206 and CAP1208 but offers additional proximity detection features not present in those variants. The '-1-SL' designation indicates a specific package configuration within the broader CAP1298 product line.

Replacement Considerations

CAP1208-1-SL provides similar touch channel count but lacks proximity detection. CAP1296-1-SL offers fewer channels. Verify pinout compatibility and register mapping before substituting. No direct single-part replacement exists with identical feature sets.