CAP1208-1-A4-TR

Overview

The CAP1208-1-A4-TR is an eight-channel capacitive touch sensor controller manufactured by Microchip Technology. It features programmable sensitivity, automatic recalibration for parasitic capacitance, and multiple pattern touch recognition. The device operates on a 3V to 5.5V supply with typical standby current of 50µA and deep sleep current of 5µA. It communicates via SMBus/I2C at frequencies up to 400kHz using the fixed address 0101_000. The component is housed in a 14-pin SOIC package and supports operation across a temperature range of -40°C to 125°C.

Feature Summary

• Eight individual capacitive touch sensor inputs with programmable sensitivity and automatic recalibration capabilities.
• Multiple Pattern Touch recognition allowing simultaneous button detection with interrupt generation.
• Low power operation featuring Active, Standby, and Deep Sleep states with communication-based wake-up.
• SMBus and I2C compliant communication interface supporting standard protocols.

Applications

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

Procurement Notes

Verify the ordering suffix '-A4' against official documentation to confirm specific packaging or tape-and-reel specifications. Ensure the host system utilizes the SMBus address 0101_000(r/w) compatible with the CAP1208-1 variant. Confirm that the application environment remains within the specified -40°C to 125°C operating temperature range for reliable performance.

Selection Notes

Select this component when an eight-channel capacitive touch solution with low power consumption is required. The CAP1208-1 variant is defined by its specific SMBus address configuration. Consider the 14-pin SOIC package for surface mount assembly requirements. Evaluate the need for multiple pattern detection and press-and-hold features for volume control applications before finalizing the design.

Part Context

The CAP1208 belongs to Microchip's family of capacitive touch sensor controllers designed for multi-button interfaces. This specific model provides eight independent channels with individual threshold settings. The device integrates analog filtering and RF detection to ensure robust performance in noisy environments while maintaining low power consumption through configurable sensing cycles.

Replacement Considerations

The CAP1208-2 is a functional alternative within the same family but utilizes a different SMBus address (0101_001). Verify software compatibility regarding address changes if substituting between variants. Other models in the series may offer different channel counts or package options but require validation of electrical and interface specifications.