{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4125AZI-S433T","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4125AZI-S433T","canonicalUrl":"https://icboms.com/infineon/CY8C4125AZI-S433T","factsUrl":"https://icboms.com/api/mcp/products/CY8C4125AZI-S433T","rawCanonicalId":null},"summary":{"shortDescription":"Infineon PSoC® 4 CY8C4100S series, CY8C4125AZI-S433T, ARM Cortex-M0+ 32-bit MCU, 24 MHz, 32 KB Flash, 4K x 8 RAM, 36 I/O, CapSense, I²C/SPI/UART, 1.71V–5.5V, -40°C to 85°C, 48-TQFP.","salesMarkdown":"## ARM Cortex-M0+ at 24 MHz — entry-level 32-bit compute with programmable analog The Infineon CY8C4125AZI-S433T is a PSoC 4 MCU built around a 32-bit ARM Cortex-M0+ core clocked at 24 MHz. The part is part of the CY8C4100S series, Infineon's entry-level PSoC 4 family that trades some CPU throughput and memory density for a lower BOM cost compared to the 48 MHz CY8C42xx siblings. What sets this device apart from a plain Cortex-M0+ MCU is the integrated programmable analog and digital fabric. On the analog side you get a 10-bit slope ADC (16 channels), a 12-bit SAR ADC (16 channels), and two current-mode IDACs. The digital subsystem includes a CapSense block for touch sensing, plus PWM timers and a watchdog timer. The supply range spans 1.71 V to 5.5 V on a single rail, so the part can run directly from a 3.6 V Li-ion cell or a 5 V industrial supply without an external LDO. ## CapSense and analog integration — what it saves on the BOM The CapSense peripheral is a hardware touch-sensing engine that handles self-capacitance and mutual-capacitance scanning without CPU intervention during the measurement cycle. For a capacitive touch interface — buttons, sliders, proximity — this eliminates a dedicated touch controller IC and the associated serial-communication overhead. The 16-channel 12-bit SAR ADC and the two IDACs can serve as a front-end for resistive sensors, thermistors, or simple current-loop outputs, again reducing external analog components. The slope ADC (10-bit, 16 channels) is a lower-accuracy, lower-power option suitable for battery-voltage monitoring or coarse sensor thresholds. The 12-bit SAR ADC covers the higher-resolution needs. Both share the same pin-mux, so the firmware selects the appropriate converter per channel. ## 48-TQFP package — layout and thermal notes The 48-TQFP (7×7 mm) has a 0.5 mm pitch, which is a standard fine-pitch QFP that routes easily on a two-layer board with 6/6 mil trace/space rules. There is no exposed thermal pad — the package dissipates through the leadframe and the 48 leads. For continuous operation near the 85°C upper limit with all I/O switching, ensure adequate copper area on the inner-layer ground plane under the package. Mounting is surface-mount only. MSL level is not listed in this record, but PSoC 4 devices typically carry MSL 3; verify the moisture sensitivity on the bag label before reflow. It is ROHS3 compliant.","metaTitle":"CY8C4125AZI-S433T PSoC 4 ARM Cortex-M0+ MCU, 24 MHz","metaDescription":"Infineon CY8C4125AZI-S433T PSoC 4 MCU: 32-bit ARM Cortex-M0+ at 24 MHz, 32 KB Flash, 4 KB SRAM, CapSense, 36 I/O, -40 to 85°C, 48-TQFP.","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":"36","Core Processor":"ARM® Cortex®-M0+","Package / Case":"48-LQFP","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":"48-TQFP (7x7)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.07","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.07000","currency":"USD"},{"qty":10,"price":"$3.65400","currency":"USD"},{"qty":25,"price":"$3.45440","currency":"USD"},{"qty":100,"price":"$2.99360","currency":"USD"},{"qty":250,"price":"$2.84012","currency":"USD"},{"qty":500,"price":"$2.54844","currency":"USD"},{"qty":1500,"price":"$2.14928","currency":"USD"},{"qty":3000,"price":"$2.04182","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1ace7f65017fc7aa7d4f2258d7a89bb2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY8C4125AZI-S433T available via RFQ confirmation?","answer":"Submit an RFQ for a real-time stock check and price quote — no automated stock count is displayed on this page."},{"question":"Is CY8C4125AZI-S433T obsolete or still active?","answer":"Infineon continues to manufacture the PSoC 4 CY8C4100S series, so this device is safe for new designs and production orders."},{"question":"Does CY8C4125AZI-S433T support CapSense?","answer":"Yes, the CapSense block is a standard peripheral on this PSoC 4 device. It supports self- and mutual-capacitance touch sensing for buttons, sliders, and proximity without an external touch controller."},{"question":"What is the difference between CY8C4125AZI-S433T and CY8C4145AZI-S433?","answer":"The CY8C4145AZI-S433 is a higher-density variant in the same CY8C4100S series. The key difference is program memory: the CY8C4125 carries 32 KB Flash, while the CY8C4145 carries 64 KB Flash. Both share the same 24 MHz Cortex-M0+ core, 4 KB SRAM, 48-TQFP package, and peripheral set including CapSense."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4125AZI-S433T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4125AZI-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}}