{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4025FNI-S402T","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4025FNI-S402T","canonicalUrl":"https://icboms.com/infineon/CY8C4025FNI-S402T","factsUrl":"https://icboms.com/api/mcp/products/CY8C4025FNI-S402T","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies PSOC® 4 CY8C4000S series ARM® Cortex®-M0+ 32-Bit MCU, CY8C4025FNI-S402T, 24MHz, 32KB FLASH, 4K x 8 RAM, 21 I/O, 25-WLCSP package, -40°C to 85°C.","salesMarkdown":"## 24 MHz Cortex-M0+ with on-chip CapSense The CY8C4025FNI-S402T: This core delivers enough throughput for sensor polling, UI control, and communication protocol handling in a single chip. On-chip peripherals include CapSense touch sensing, LCD drive, PWM, and a brown-out detect/reset — the CapSense block alone can replace a separate touch controller in human-interface applications like capacitive buttons or sliders. The 32 KB flash and 4 KB RAM (4K x 8) set the firmware budget: the flash holds the application code and constant data, while the RAM handles stack, heap, and small buffers. For designs needing more than a few kilobytes of runtime data, plan for external memory or a higher-tier PSOC 4 variant. ## WLCSP package and board integration The 25-WLCSP package (2.02 x 1.93 mm) is a wafer-level chip-scale package with solder balls directly on the die — no molded body. This shrinks the footprint to the bare die size, which helps in space-constrained designs like wearables or sensor modules, but the 0.4 mm ball pitch demands careful PCB layout with via-in-pad or microvia fan-out. The wide range means a single regulator can feed the MCU without a secondary LDO, simplifying the power tree. ## Connectivity and I/O budget The I²C and SPI interfaces allow daisy-chaining sensors or EEPROMs, while the UART handles debug or fieldbus bridging. The single 10-bit ADC limits analog input channels — if the application needs more than one analog sensor, an external analog mux or a PSOC 4 part with more ADC channels (like the CY8C4245LQI-483 with 8x12-bit) is the migration path. ROHS3 compliant, meeting the latest EU restriction-of-hazardous-substances directive. No additional compliance documentation (REACH, UL, IEC) is listed in the available records.","metaTitle":"Infineon CY8C4025FNI-S402T PSOC 4 MCU, 24MHz, 32KB Flash","metaDescription":"CY8C4025FNI-S402T from Infineon PSOC® 4 series. ARM Cortex-M0+ at 24MHz, 32KB flash, 4KB RAM, 21 I/O, 25-WLCSP. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"PSOC® 4 CY8C4000S","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"24MHz","Series":"PSOC® 4 CY8C4000S","Package":"Tape & Reel (TR); Cut Tape (CT)","RAM Size":"4K x 8","Core Size":"32-Bit Single-Core","Peripherals":"Brown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"21","Core Processor":"ARM® Cortex®-M0+","Package / Case":"25-XFBGA, WLCSP","Data Converters":"A/D 1x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"32KB (32K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"25-WLCSP (2.02x1.93)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.71","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.71000","currency":"USD"},{"qty":10,"price":"$2.43600","currency":"USD"},{"qty":25,"price":"$2.29760","currency":"USD"},{"qty":100,"price":"$1.95770","currency":"USD"},{"qty":250,"price":"$1.83820","currency":"USD"},{"qty":500,"price":"$1.60842","currency":"USD"},{"qty":1000,"price":"$1.33270","currency":"USD"},{"qty":2000,"price":"$1.24079","currency":"USD"},{"qty":6000,"price":"$1.19483","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a3c4c8787d664729a6e0a4fe3d8b4319.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY8C4025FNI-S402T a drop-in replacement for CY8C4245LQI-483?","answer":"No — the CY8C4245LQI-483 uses a 48-pin QFN package (7x7 mm) with 34 I/O, while the CY8C4025FNI-S402T is a 25-ball WLCSP (2.02x1.93 mm) with 21 I/O. The pinout, footprint, and ball map are different; a board spin is required. The CY8C4245 also runs at 48 MHz and has 8x12-bit ADC versus the 1x10-bit ADC here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4025FNI-S402T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4025FNI-S402T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}