CY8C20637-24LQXIT

Application Specific Microcontrollers Overview

The Infineon CY8C20637-24LQXIT is an 8-bit microcontroller from the CY8C20xx7/S family, featuring a M8C CPU with a maximum clock speed of 24 MHz. It integrates a CapSense controller supporting up to 31 sensing inputs and includes 8 KB of Flash memory and 1 KB of SRAM. The device operates within a voltage range of 1.71 V to 5.5 V and supports temperatures from -40°C to +85°C. Key features include SmartSense Auto-tuning, QuietZone technology, and multiple communication interfaces such as I2C and SPI.

Application Specific Microcontrollers Feature Summary

• CapSense Controller: Supports up to 31 buttons, 6 sliders, and proximity sensors using patented CSD PLUS algorithm.
• SmartSense Auto-Tuning: Automatically maintains optimal sensor performance during runtime, eliminating manual tuning.
• QuietZone Technology: Provides superior noise immunity against conducted and radiated noise with ultra-low emissions.
• System Resources: Includes I2C slave, SPI master/slave, three 16-bit timers, and a 10-bit ADC.

Application Specific Microcontrollers Applications

• Capacitive touch button interfaces
• Slider and touchpad controls
• Proximity sensing applications

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix 'T' against official documentation to confirm tape-and-reel packaging details. Confirm RoHS compliance status and ensure the component meets environmental requirements for the intended application. Cross-reference the datasheet revision *Q for any silicon errata or updates relevant to this part number.

Application Specific Microcontrollers Selection Notes

Select this model when requiring up to 31 CapSense inputs in a 48-pin QFN package. Ensure the design accommodates the 1.71 V to 5.5 V operating voltage range. Consider the 8 KB Flash and 1 KB SRAM limits for firmware size. Verify that the GPIO current sourcing capabilities (5 mA on Ports 0/1) meet load requirements.

Application Specific Microcontrollers Part Context

This component belongs to the CY8C20xx7/S series of 1.8 V CapSense controllers. It shares architectural similarities with other members like the CY8C20337 and CY8C20437 but offers higher input counts due to its 48-pin QFN package. The series is designed to replace traditional MCU-based systems with a single programmable chip.

Application Specific Microcontrollers Replacement Considerations

Check for direct pin-compatible alternatives within the CY8C20xx7/S family, such as CY8C20337 or CY8C20437, depending on required I/O count. Verify if newer generations or different package options are available from Infineon. Ensure any substitute maintains the same M8C core and CapSense functionality.