CY8C20337-24LQXI

Application Specific Microcontrollers Overview

The CY8C20337-24LQXI is a PSoC 1 microcontroller from the CY8C20xx7/S family, designed for capacitive sensing applications. It integrates an M8C CPU core operating at up to 24 MHz with 8 KB of Flash memory and 1 KB of SRAM. The device features a dedicated CapSense block supporting up to 16 sensing inputs in the 24-pin QFN package. Key electrical specifications include a supply voltage range of 1.71 V to 5.5 V, standby current of 1.1 µA (typical), and deep sleep current of 0.1 µA (typical). It operates within a temperature range of –40°C to +85°C.

Application Specific Microcontrollers Feature Summary

• CapSense Controller: Implements CSD PLUS™ algorithm with SmartSense Auto-tuning for robust noise immunity and automatic parameter maintenance.
• Memory Architecture: Includes 8 KB Flash and 1 KB SRAM with read-while-write capability and support for EEPROM emulation.
• Low Power Modes: Offers standby mode at 1.1 µA typical and deep sleep mode at 0.1 µA typical.
• I/O Capabilities: Provides up to 20 GPIOs with high sink current (25 mA per pin) and configurable driven shield outputs.

Application Specific Microcontrollers Applications

• Capacitive touch buttons and sliders
• Proximity sensing interfaces
• Consumer electronics with overlay thickness requirements
• Battery-powered devices requiring low power consumption

Application Specific Microcontrollers Procurement Notes

Verify the component status as active or obsolete through official Cypress/Infineon channels before procurement. Confirm the specific ordering suffix matches the required package and temperature grade. Ensure compliance with RoHS directives if applicable to the target market. Check for any silicon errata relevant to the specific revision code associated with the part number.

Application Specific Microcontrollers Selection Notes

Select this model when 16 CapSense inputs are sufficient within a compact 24-pin footprint. Choose this variant over larger packages if board space is constrained but more than 10 sensing inputs are needed. Verify that the 8 KB Flash capacity meets application firmware requirements. Consider the 24 MHz maximum clock speed for processing overhead relative to sensor scanning rates.

Application Specific Microcontrollers Part Context

This part belongs to the CY8C20xx7/S series, which shares architectural similarities with other members like CY8C20347 and CY8C20437. Differences primarily lie in package options and available sensing input counts. The CY8C20337 specifically targets designs needing 16 sensing pins in a QFN form factor, distinguishing it from 16-pin or 32-pin variants in the same family.

Application Specific Microcontrollers Replacement Considerations

Direct substitutes within the same family include CY8C20347-24LQXI, which offers identical pinout and functionality but may differ in memory size or feature set. Cross-family replacements require careful evaluation of pin compatibility and software migration efforts due to architectural differences between PSoC generations.

Application Specific Microcontrollers FAQ

What is the maximum number of CapSense inputs supported by the CY8C20337-24LQXI?

The CY8C20337-24LQXI supports up to 16 CapSense sensing inputs when packaged in the 24-pin QFN format.

Does the device support auto-tuning for CapSense sensors?

Yes, it includes SmartSense Auto-tuning technology that automatically sets and maintains optimal sensor performance parameters during runtime without manual tuning.

What is the typical current consumption in deep sleep mode?

The typical current consumption in deep sleep mode is 0.1 µA.