CY8C21434-24LQXIT

Overview

The CY8C21434-24LQXIT is an 8-bit microcontroller from the Infineon PSoC 1 family, utilizing the M8C core. It features 8KB of Flash memory and 512 bytes of RAM. The device operates within a voltage range of 2.4V to 5.25V and supports clock frequencies up to 24 MHz. It includes one 10-bit Delta-Sigma ADC with a sampling rate of 5.9 ksps. The component provides 24 CapSense-enabled I/O pins and is housed in a 24-pin QFN package.

Feature Summary

• Integrates CapSense technology for capacitive touch sensing applications
• Includes a programmable Delta-Sigma analog-to-digital converter module
• Features a high-performance 8-bit M8C processor core

Applications

• Capacitive touch interface controllers
• Low-power embedded control systems
• Battery-operated consumer electronics

Procurement Notes

Verify the specific suffix LQXIT against official datasheets to confirm package type and tape-and-reel packaging configuration. Confirm end-of-life status or obsolescence notifications prior to procurement, as availability may be restricted. Ensure design-in compatibility with existing PCB footprints and thermal requirements for the specified package.

Selection Notes

Select this component when a dedicated solution for capacitive sensing combined with basic digital processing is required. The integrated CapSense hardware reduces external component count compared to general-purpose MCUs. Consider the 24MHz speed and 8KB memory limits for application complexity. Verify that the 2.4V minimum supply voltage aligns with system power rails.

Part Context

This part belongs to the PSoC 1 series, which combines a standard CPU with configurable analog and digital peripherals. The CY8C21434 variant specifically targets cost-sensitive applications requiring touch sensing capabilities without complex external interfaces. It represents an earlier generation of mixed-signal programmable systems on chip from Infineon.

Replacement Considerations

Check for direct pin-compatible replacements within the same PSoC 1 family. Verify if newer generations like PSoC 3 or PSoC 4 offer functional equivalents with updated toolchains. Cross-reference electrical specifications to ensure voltage and temperature ranges match.