CY8C20666AS-24LQXIT

Application Specific Microcontrollers Overview

The CY8C20666AS-24LQXIT is an 8-bit microcontroller from the Infineon PSoC 1 family, featuring the M8C CPU core with a maximum clock speed of 24 MHz. It integrates 32 KB of Flash program memory and 2 KB of SRAM data memory within a 48-pin QFN package. The device supports an operating voltage range of 1.71 V to 5.5 V and operates within a temperature range of –40 °C to +85 °C. Key peripherals include Full-Speed USB 2.0 (12 Mbps), I²C slave, SPI master/slave, three 16-bit timers, a 10-bit ADC, and two analog comparators. It also features a dedicated CapSense block supporting up to 33 buttons or 6 sliders with SmartSense auto-tuning.

Application Specific Microcontrollers Feature Summary

• M8C Harvard-architecture processor running at up to 24 MHz
• 32 KB Flash and 2 KB SRAM with Read-While-Write EEPROM emulation
• Full-Speed USB 2.0 interface (12 Mbps)
• CapSense controller with SmartSense auto-tuning for up to 33 sensors

Application Specific Microcontrollers Applications

• Capacitive touch sensing interfaces requiring noise immunity
• USB-enabled consumer electronics and peripherals
• Low-power battery-operated devices utilizing standby modes
• Industrial control systems needing I²C/SPI communication

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix 'S' against the manufacturer's current product status documentation. Confirm that the 48-pin QFN package dimensions align with the target PCB footprint requirements. Ensure development tools such as PSoC Designer and compatible programmers are available for firmware implementation.

Application Specific Microcontrollers Selection Notes

Select this model when 32 KB of program memory is required alongside Full-Speed USB connectivity. The 'AS' variant indicates specific silicon revisions or feature sets compared to the standard 'A' series; consult the latest datasheet revision history for functional differences. Verify GPIO availability after allocating pins for USB and CapSense functions.

Application Specific Microcontrollers Part Context

This component belongs to the CY8C20XX6A/S family of Programmable CapSense Controllers. It shares architectural similarities with variants like the CY8C20666A but includes specific suffix designations. The family is designed to replace multiple traditional MCU components with a single programmable chip, integrating analog and digital resources.

Application Specific Microcontrollers Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Evaluate pin-compatible alternatives within the same PSoC 1 family only if electrical specifications and memory sizes match exactly.