{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4125LQI-S433T","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4125LQI-S433T","canonicalUrl":"https://icboms.com/infineon/CY8C4125LQI-S433T","factsUrl":"https://icboms.com/api/mcp/products/CY8C4125LQI-S433T","rawCanonicalId":null},"summary":{"shortDescription":"Infineon PSoC® 4 CY8C4100S series, CY8C4125LQI-S433T, ARM Cortex-M0+ 32-bit MCU, 24 MHz, 32 KB Flash, 4 KB SRAM, 34 I/O, CapSense, LCD, 16x10b/12b ADC, 2xIDAC, -40°C to 85°C, 40-QFN.","salesMarkdown":"## Active production part — no end-of-life watch needed Infineon continues to manufacture the PSoC 4 CY8C4100S series, and the part is ROHS3 compliant. ## 24 MHz Cortex-M0+ — enough throughput for sensor fusion and HMI At 24 MHz, the ARM Cortex-M0+ core in this MCU is not a high-speed number-cruncher, but it is deliberately sized for the PSoC 4's strength: mixed-signal and human-interface control. The 32 KB Flash and 4 KB SRAM are enough for CapSense touch-scanning firmware, LCD segment drive, and a few serial protocol stacks without external memory. ## Analog and peripheral set — CapSense, dual ADC, dual IDAC The CY8C4125LQI-S433T integrates a 16-channel 10-bit slope ADC and a separate 16-channel 12-bit SAR ADC, plus two current-output IDACs. That combination handles both slow-scan touch sensing (slope ADC) and higher-resolution analog measurements (SAR ADC) on the same die. The CapSense block is the same hardware used across the PSoC 4 family, so firmware from a CY8C4245 project ports with minimal changes. Brown-out detect, LVD, POR, PWM, and WDT are all on-chip, reducing external supervisor IC count. ## 40-QFN package — thermal and layout notes The 40-UFQFN with exposed pad (6x6 mm body) routes 34 I/O to the board. No special MSL derating is noted, but the standard MSL 3 floor-life window applies out of the bag. ## Comparison to CY8C4245LQI-483 — speed and ADC count The CY8C4245LQI-483 runs at 48 MHz (double the 24 MHz) and uses an older ARM Cortex-M0 core (not M0+), but shares the same 34 I/O, CapSense, and serial connectivity. The CY8C4125LQI-S433T has a richer ADC complement — 16x10b slope plus 16x12b SAR versus the 4245's 8x12b SAR only — making it a better fit for designs that need both touch and higher-resolution analog inputs. Both are active; the 4245 is a speed upgrade if the extra ADC channels are not needed.","metaTitle":"CY8C4125LQI-S433T PSoC 4 MCU, 24 MHz ARM Cortex-M0+","metaDescription":"Infineon CY8C4125LQI-S433T 32-bit ARM Cortex-M0+ MCU, 24 MHz, 32 KB Flash, 4 KB SRAM, 34 I/O, CapSense, -40°C to 85°C, 40-QFN.","metaKeywords":null},"attributes":{"series":"PSOC® 4 CY8C4100S","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Speed":"24MHz","Series":"PSOC® 4 CY8C4100S","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":"34","Core Processor":"ARM® Cortex®-M0+","Package / Case":"40-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":"40-QFN (6x6)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.01","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.01000","currency":"USD"},{"qty":10,"price":"$3.60600","currency":"USD"},{"qty":25,"price":"$3.40880","currency":"USD"},{"qty":100,"price":"$2.95420","currency":"USD"},{"qty":250,"price":"$2.80276","currency":"USD"},{"qty":500,"price":"$2.51490","currency":"USD"},{"qty":1000,"price":"$2.12100","currency":"USD"},{"qty":2500,"price":"$2.01495","currency":"USD"},{"qty":5000,"price":"$1.93920","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1ace7f65017fc7aa7d4f2258d7a89bb2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY8C4125LQI-S433T obsolete or still active?","answer":"It can be sourced for new designs without near-term obsolescence risk."},{"question":"What is the replacement for CY8C4125LQI-S433T?","answer":"No direct official replacement is listed because the part remains active. If you need higher throughput, the CY8C4245LQI-483 (48 MHz Cortex-M0) is a functional alternative with fewer ADC channels. For BLE capability, the CY8C4247LQI-BL473 integrates Bluetooth but uses a different package and core."},{"question":"Is CY8C4125LQI-S433T compatible with PSoC 4 development kits?","answer":"Yes, the CY8C4125LQI-S433T is part of the PSoC 4 CY8C4100S series and is supported by the standard PSoC Creator and ModusToolbox IDEs. It uses the same SWD debug interface as other PSoC 4 devices, so a PSoC 4 Pioneer Kit or MiniProg3/4 programmer works for development and programming."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4125LQI-S433T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4125LQI-S433T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}