CAP1293-1-SN-TR

Overview

The CAP1293-1-SN-TR is a three-channel capacitive touch sensor controller manufactured by Microchip Technology. It features three individual capacitive touch sensor inputs with programmable sensitivity and automatic recalibration for parasitic capacitance compensation. The device supports proximity detection on one or more channels using an optional signal guard to reduce noise sensitivity. It includes multiple pattern touch recognition, power button support, and a press-and-hold feature. Power consumption varies by state: 5µA typical in Deep Sleep, 50µA in Standby with one sensor active, and up to 750µA during active sensing. It operates on a 3V to 5.5V supply and communicates via SMBus/I2C. The component is housed in an 8-pin SOIC package.

Feature Summary

• Three independent capacitive touch sensor inputs with programmable sensitivity and automatic recalibration
• Proximity detection capability with optional signal guard to isolate antennas from attenuation
• Multiple pattern touch recognition allowing simultaneous button detection with interrupt generation
• Low power operation with Deep Sleep mode drawing 5µA and Standby mode drawing 50µA

Applications

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

Procurement Notes

Verify the ordering suffix SN-TR indicates the 8-pin SOIC package and tape-and-reel packaging configuration. Confirm the device revision matches the required silicon version for your application. Ensure the supplier provides documentation confirming RoHS compliance and adherence to the specified operating temperature range of -40°C to 125°C.

Selection Notes

Select this component when a three-channel touch interface with integrated proximity detection is required. The SOIC package is suitable for through-hole or standard surface mount assembly processes requiring wider pin spacing. Consider the 5V tolerant I/O pins if interfacing directly with 5V logic systems without level shifting. Evaluate the power states to optimize battery life in portable applications.

Part Context

The CAP1293 series includes variants with different package options such as TDFN and SOIC. The CAP1293-1-SN-TR specifically denotes the SOIC package variant. Other models in the family may offer different channel counts or package types but share the same core functionality and register map. This part number represents a specific physical form factor within the broader capacitive touch sensor product line.

Replacement Considerations

Direct replacements must match the 3-channel capacitive touch architecture and SMBus/I2C interface. Verify pin compatibility for the 8-pin SOIC package. Alternative Microchip parts like the CAP1296 offer similar functionality but may have different channel counts or package options. Ensure any substitute supports the required proximity detection and signal guard features if applicable.