{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4125LQI-S432","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4125LQI-S432","canonicalUrl":"https://icboms.com/infineon/CY8C4125LQI-S432","factsUrl":"https://icboms.com/api/mcp/products/CY8C4125LQI-S432","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies PSoC® 4 CY8C4100S series ARM Cortex-M0+ MCU, 24 MHz, 32 KB Flash, 4 KB SRAM, 27 I/O, 32-UFQFN exposed pad, -40 to 85 °C.","salesMarkdown":"## Active lifecycle with a compliance caveat The CY8C4125LQI-S432: RoHS non-compliant per the manufacturer listing; this matters for EU RoHS enforcement and for contracts that mandate the exemption-free directive. The part ships with the factory's standard five-year warranty through authorized distribution. ## Cortex-M0+ core with integrated analog and touch 32-bit ARM Cortex-M0+ core clocked at 24 MHz — the 2-stage pipeline and single-cycle multiply deliver 0.95 DMIPS/MHz, adequate for sensor fusion, HMI polling, and real-time control loops in industrial and consumer embedded systems. 32 KB on-chip flash and 4 KB SRAM — the flash stores a modest firmware stack including a RTOS kernel and CapSense library; the SRAM leaves room for a 1 KB touch-scan buffer plus a few hundred bytes of stack and variable space. Analog front-end includes a 16-channel 10-bit slope ADC and a separate 16-channel 12-bit SAR ADC, plus two IDAC outputs. The slope ADC is well suited for low-frequency capacitive sensing scans; the SAR ADC handles higher-speed sensor readings at up to 1 Msps. CapSense peripheral is the headline block — the CY8C4100S series is built around Cypress's fifth-generation capacitive touch sensing, supporting self-capacitance and mutual-capacitance electrodes. LCD segment drive is also integrated for direct glass displays without an external controller. ## Supply flexibility and serial connectivity The wide range also covers battery-discharge down to 1.71 V. Serial interfaces include I²C (master/slave), SPI, UART/USART, LINbus 2.1, IrDA, Microwire, and SmartCard — the SCB (Serial Communication Block) can be reconfigured in firmware to any of these protocols, reducing BOM by eliminating external protocol converters. 27 general-purpose I/O lines in the 32-QFN package — the exposed pad provides a low-inductance ground return for the analog peripherals and aids thermal dissipation when the MCU drives external loads. ## Industrial temperature grade and package footprint 32-UFQFN exposed pad package, 5x5 mm body — the 0.5 mm pitch QFN footprint is standard for compact sensor nodes, wearable HMI panels, and space-constrained IoT edge devices.","metaTitle":"Infineon CY8C4125LQI-S432 PSoC 4 MCU, 24 MHz, 32 KB Flash","metaDescription":"Active-production ARM Cortex-M0+ MCU, 24 MHz, 32 KB Flash, 4 KB SRAM, CapSense, 16-ch ADC, 1.71-5.5 V, -40 to 85 °C. RoHS non-compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":"PSOC® 4 CY8C4100S","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"24MHz","Series":"PSOC® 4 CY8C4100S","Package":"Tray","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":"27","Core Processor":"ARM® Cortex®-M0+","Package / Case":"32-UFQFN Exposed Pad","Data Converters":"A/D 16x10b Slope, 16x12b SAR; D/A 2xIDAC","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":"32-QFN (5x5)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.91","stockQuantity":0,"priceTiers":[{"qty":246,"price":"$2.03260","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1ace7f65017fc7aa7d4f2258d7a89bb2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to CY8C4125LQI-S432 in the PSoC 4 family?","answer":"The CY8C4125LQI-S432 is part of the PSoC 4 CY8C4100S series. Pin-compatible siblings in the same 32-QFN package include devices with larger flash (up to 64 KB) and more SRAM (up to 8 KB) from the CY8C414x sub-family — the peripheral set and pinout are identical, so a BOM swap without PCB layout change is possible."},{"question":"What compliance documentation does Infineon provide for CY8C4125LQI-S432?","answer":"The part is RoHS non-compliant per Infineon's lifecycle listing. No REACH, UL, or IEC certification is explicitly stated in the manufacturer record. Standard Infineon documentation includes a datasheet with electrical characteristics, application notes for the PSoC 4 family, and a PCN (Product Change Notification) subscription for any manufacturing changes. For military or aerospace programs requiring QML or MIL-PRF screening, the part is not rated — it is a commercial/industrial-grade MCU."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4125LQI-S432","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4125LQI-S432 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}}