{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C4045LQI-S411","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C4045LQI-S411","canonicalUrl":"https://icboms.com/infineon/CY8C4045LQI-S411","factsUrl":"https://icboms.com/api/mcp/products/CY8C4045LQI-S411","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies PSOC® 4 CY8C4000S series, ARM® Cortex®-M0+ 32-Bit Single-Core MCU, 48MHz, 32KB Flash, 4K x 8 RAM, 19 I/O, 24-UFQFN Exposed Pad package, -40°C ~ 85°C.","salesMarkdown":"## Core architecture and memory envelope The CY8C4045LQI-S411 is a 32-bit single-core MCU built around the ARM Cortex-M0+ processor running at 48 MHz — the M0+ pipeline delivers 0.95 DMIPS/MHz, so the throughput ceiling is roughly 45 DMIPS before flash wait-states factor in. On-chip program memory is 32 KB of Flash (32K x 8), paired with 4K x 8 of SRAM. The 4 KB RAM footprint suits lightweight sensor-node or CapSense front-end applications where the stack and a few buffers fit; anything requiring a large frame buffer or RTOS heap will push against this ceiling. ## Supply flexibility and peripheral set Connectivity covers I²C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, and UART/USART — enough serial interfaces for a mixed-protocol sensor hub or human-machine interface panel. ## Package, footprint, and temperature grade Housed in a 24-UFQFN with exposed pad, the supplier device package is 24-QFN (4x4 mm). The 19 general-purpose I/O count is the total available on this 24-pin package — each I/O can be mapped to the CapSense, serial, or timer functions via the programmable routing matrix, but the 19-pin ceiling means a design needing more than 19 external signals must move to a larger package variant in the CY8C4000S family. No official second-source cross-reference exists from Infineon, but the part is a single-sourced PSOC 4 device.","metaTitle":"Infineon CY8C4045LQI-S411 MCU, ARM Cortex-M0+, 48MHz","metaDescription":"Infineon PSOC 4 CY8C4000S MCU, 32-bit ARM Cortex-M0+ core at 48MHz, 32KB Flash, 4K x 8 RAM, 19 I/O, 1.71V-5.5V supply, -40°C to 85°C, 24-QFN (4x4).","metaKeywords":null},"attributes":{"series":"PSOC® 4 CY8C4000S","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"48MHz","Series":"PSOC® 4 CY8C4000S","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":"19","Core Processor":"ARM® Cortex®-M0+","Package / Case":"24-UFQFN Exposed Pad","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":"24-QFN (4x4)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.16","stockQuantity":19,"priceTiers":[{"qty":1,"price":"$3.16000","currency":"USD"},{"qty":10,"price":"$2.83600","currency":"USD"},{"qty":25,"price":"$2.68160","currency":"USD"},{"qty":80,"price":"$2.32400","currency":"USD"},{"qty":230,"price":"$2.20483","currency":"USD"},{"qty":490,"price":"$1.97839","currency":"USD"},{"qty":980,"price":"$1.66852","currency":"USD"},{"qty":2450,"price":"$1.58509","currency":"USD"},{"qty":4900,"price":"$1.52550","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a3c4c8787d664729a6e0a4fe3d8b4319.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional peer to CY8C4045LQI-S411 — will CY8C4245LQI-483 drop in without rewiring?","answer":"The CY8C4245LQI-483 shares the same ARM Cortex-M0 core at 48 MHz and the same PSOC 4 peripheral set (CapSense, serial interfaces, PWM), but it comes in a 68-QFN package with 34 I/O and an 8-channel 12-bit SAR ADC. The 24-QFN (4x4 mm) footprint of the CY8C4045LQI-S411 is physically smaller and has fewer pins — the 68-pin CY8C4245LQI-483 will not fit the same PCB land pattern. A board respin is required to migrate; the two parts are not pin-compatible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C4045LQI-S411","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C4045LQI-S411 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}}