CY8C20666A-24LTXIT

Application Specific Microcontrollers Overview

The CY8C20666A-24LTXIT is an 8-bit microcontroller from the Infineon PSoC 1 family, featuring the M8C CPU core with a maximum operating frequency of 24 MHz. It integrates a programmable CapSense controller supporting up to 33 buttons or sliders with SmartSense auto-tuning. The device includes 32 KB of Flash memory and 2 KB of SRAM. Key peripherals include a Full-Speed USB interface, I2C slave, SPI master/slave, three 16-bit timers, a 10-bit ADC, and two comparators. It operates within a voltage range of 1.71 V to 5.5 V and supports temperatures from -40 °C to +85 °C in a QFN-48 package.

Application Specific Microcontrollers Feature Summary

• M8C CPU Core: Harvard architecture 8-bit processor running up to 24 MHz.
• CapSense Technology: Supports up to 33 sensing inputs with SmartSense auto-tuning for robust noise immunity.
• Memory Configuration: Equipped with 32 KB Flash program memory and 2 KB SRAM data memory.
• Communication Interfaces: Includes Full-Speed USB (12 Mbps), I2C Slave, and configurable SPI Master/Slave.

Application Specific Microcontrollers Applications

• Capacitive touch interfaces requiring auto-tuning capabilities
• USB-enabled consumer electronics and peripherals
• Battery-powered devices utilizing low-power sleep modes
• Systems requiring integrated analog sensing and digital control

Application Specific Microcontrollers Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Check for moisture sensitivity labeling as the device is humidity-sensitive. Ensure storage conditions comply with JEDDEC standards prior to soldering. Review the latest datasheet for any silicon errata or updates relevant to this specific revision.

Application Specific Microcontrollers Selection Notes

Select this model when 33 CapSense channels are required alongside Full-Speed USB connectivity. Compare against CY8C20636A or CY8C20646 variants if fewer sensors or different pin counts suffice. Verify that the QFN-48 package fits the PCB footprint constraints. Ensure the application voltage remains within the 1.71 V to 5.5 V operational range for reliable performance.

Application Specific Microcontrollers Part Context

This component belongs to the CY8C20xx6A/S series of Programmable CapSense Controllers. It shares architectural similarities with other members like the CY8C20667S but differs in package type and specific I/O configurations. The series is designed to replace multiple discrete components by integrating analog and digital resources on a single chip.

Application Specific Microcontrollers Replacement Considerations

Direct pin-to-pin replacements may include other CY8C20xx6A variants with compatible packages. Verify memory size and peripheral availability in potential substitutes. Ensure the replacement supports the same CapSense channel count and USB functionality if required by the design.