CY8C21345-24SXI

Overview

The CY8C21345-24SXI is a PSoC Programmable System-on-Chip featuring an M8C processor operating up to 24 MHz. It includes 8 KB Flash, 512 bytes SRAM, and four digital PSoC blocks alongside six analog Type E blocks. The device supports configurable GPIOs, I2C interfaces, and CapSense resources within a 28-pin SOIC package.

Feature Summary

• Configurable analog and digital logic blocks enable custom peripheral creation
• Integrated M8C CPU core with Harvard architecture for embedded control
• Supports CapSense technology with dedicated scanning timers and IDACs
• Flexible clocking system with internal oscillators and PLL options

Applications

• Capacitive touch sensing interfaces
• Low-power industrial monitoring systems
• Custom communication protocol implementations
• Analog signal conditioning and acquisition

Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature range. Confirm that the silicon revision aligns with your design requirements, particularly regarding any documented errata affecting oscillator accuracy or analog performance at extreme temperatures.

Selection Notes

Select this component when application needs require flexible analog-digital integration rather than fixed-function peripherals. The limited digital block count suits designs needing moderate logic complexity. Ensure the 28-pin footprint fits the mechanical constraints of the target enclosure.

Part Context

This part belongs to the Cypress PSoC 1 family, specifically the CY8C21x45 series designed for cost-sensitive applications requiring mixed-signal capabilities. It shares architectural similarities with the CY8C22x45 but offers reduced digital resource density while maintaining full analog configurability.

Replacement Considerations

Direct pin-compatible substitutes include other members of the CY8C21x45 family such as the CY8C21334, though memory sizes differ. Cross-family replacements like the CY8C22x45 offer more digital blocks but require schematic review due to pinout variations.