{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4125FNI-S433T","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4125FNI-S433T","canonicalUrl":"https://icboms.com/infineon/CY8C4125FNI-S433T","factsUrl":"https://icboms.com/api/mcp/products/CY8C4125FNI-S433T","rawCanonicalId":null},"summary":{"shortDescription":"Infineon PSoC® 4 CY8C4100S series, CY8C4125, 32-bit ARM Cortex-M0+ MCU, 24 MHz, 32 KB Flash, 31 I/O, 1.71 V supply, -40°C to 85°C, 35-WLCSP.","salesMarkdown":"## PSoC 4 CY8C4125FNI-S433T: 32-bit ARM Cortex-M0+ with integrated CapSense and mixed-signal Includes on-chip CapSense block for capacitive touch sensing, plus a mixed-signal front end with 16-channel 10-bit slope and 16-channel 12-bit SAR ADCs and two IDACs. Typical applications span touch-button or slider interfaces on appliances, industrial control panels, medical user-input devices, and IoT edge nodes that need to read multiple analog sensors and communicate over I2C, SPI, UART, or LIN bus. The 24 MHz Cortex-M0+ core is not a number-cruncher; it is a control-loop and state-machine engine. At this clock speed, the flash can run with zero wait states, keeping interrupt latency predictable for real-time sensor polling. The 1.71 V minimum supply voltage lets it operate directly from a single lithium cell or a 1.8 V rail, which simplifies the power tree in battery-powered designs — no separate 3.3 V regulator needed. The 32 KB Flash and 31 I/O in a 35-bump WLCSP mean this part is sized for a specific tier: enough memory for a modest firmware stack with CapSense tuning tables and communication buffers, but not intended for large application code or extensive data logging. The WLCSP package requires careful board-level assembly planning — it is a direct-chip-attach footprint, not a hand-solderable QFP. ## Mixed-signal on a single chip: 16-channel ADC and dual IDAC The part carries both a 16-channel 10-bit slope ADC and a 16-channel 12-bit SAR ADC. The slope converter is useful for low-frequency measurements like temperature or battery voltage where noise rejection matters; the SAR ADC handles faster signals up to the 12-bit resolution. Two IDACs on the output side can drive sensor excitation currents or generate analog reference levels, eliminating external DACs in many sensor-front-end designs.","metaTitle":"Infineon CY8C4125FNI-S433T PSoC 4 MCU, ARM Cortex-M0+","metaDescription":"Infineon CY8C4125FNI-S433T is a 32-bit ARM Cortex-M0+ MCU from the PSoC 4 CY8C4100S series, 24 MHz, 32 KB Flash, 31 I/O, -40°C to 85°C, 35-WLCSP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"series":"PSOC® 4 CY8C4100S","has_mpn":"CY8C4125","cpu_core":"ARM® Cortex®-M0+","frame_size":"32-Bit Single-Core","fuse_speed":"24 MHz","connectivity":"I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART","package_type":"Tape & Reel (TR)","Number Of I/O":"31","mounting_type":"Surface Mount","product_status":"Active","Data Converters":"A/D 16x10b Slope, 16x12b SAR; D/A 2xIDAC","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","peripheral_types":"Brown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT","supply_voltage_v":"1.71","Program Memory Type":"FLASH","Operating Temperature High":"-40°C to 85°C (TA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.67","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1ace7f65017fc7aa7d4f2258d7a89bb2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY8C4125FNI-S433T/alternatives.json"},"ai":{"faq":[{"question":"Can CY8C4125FNI-S433T be used as a replacement for CY8C4124 series?","answer":"The CY8C4125FNI-S433T is a higher-density variant within the same PSoC 4 CY8C4100S family. It offers 32 KB Flash versus the 16 KB of the CY8C4124 series, and shares the same ARM Cortex-M0+ core, CapSense peripheral, and 35-WLCSP package. Firmware migration requires a memory map adjustment, but the peripheral set and pinout are consistent across the density options."},{"question":"What package is CY8C4125FNI-S433T available in?","answer":"It is supplied in a 35-bump WLCSP (Wafer-Level Chip-Scale Package) on Tape & Reel. This is a direct-chip-attach footprint for surface-mount assembly, not a hand-solderable package."},{"question":"Is CY8C4125FNI-S433T compatible with PSoC Creator?","answer":"Yes, the PSoC 4 CY8C4100S series is supported in PSoC Creator, Infineon's integrated design environment for configuring the CapSense, ADC, IDAC, and digital peripherals, and generating the firmware framework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4125FNI-S433T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4125FNI-S433T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}