{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY9BF121KQN-G-AVE2","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY9BF121KQN-G-AVE2","canonicalUrl":"https://icboms.com/infineon/CY9BF121KQN-G-AVE2","factsUrl":"https://icboms.com/api/mcp/products/CY9BF121KQN-G-AVE2","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies FM3 MB9B120M series ARM Cortex-M3 microcontroller, CY9BF121KQN-G-AVE2, 32-bit single-core, 72MHz, 96KB Flash, 16K x 8 RAM, 48-QFN exposed pad, -40 to +105°C.","salesMarkdown":"## ARM Cortex-M3 core at 72 MHz with 96 KB flash The CY9BF121KQN-G-AVE2 is a 32-bit single-core ARM Cortex-M3 MCU from Infineon's FM3 MB9B120M series, clocked at 72 MHz. The 96 KB on-chip flash and 16K x 8 SRAM leave headroom for a moderate application stack plus a real-time operating system footprint — the 16 KB RAM is the tighter budget for data-heavy control loops. ## Industrial temperature margin and package Surface-mount assembly on the 0.50 mm pitch QFN demands a solder-paste stencil that matches the exposed-pad aperture; the manufacturer's land pattern recommends a 5.2 x 5.2 mm pad with 0.25 mm via pitch for thermal relief. ## Peripheral set for mixed-signal control Fourteen 12-bit ADC channels and two 10-bit DAC channels let the MCU sample multiple analog sensors and output a control voltage without an external converter — useful for a three-phase current-sense front-end or a valve-positioning loop. The DMA controller moves ADC results to RAM without CPU intervention, keeping the 72 MHz core free for the control algorithm. Serial interfaces include CSIO, I²C, LINbus, and UART/USART — enough for a CAN gateway (via an external transceiver on the UART), an I²C temperature sensor, and a LIN bus for a local actuator network. The PWM timer with dead-time insertion drives a half-bridge FET pair directly. The FM3 MB9B120M series is a current-production line, so the part is sourced through authorized distribution channels with full manufacturer warranty and lot traceability. ROHS3 compliant per. The 48-QFN package is Pb-free and compatible with standard lead-free reflow profiles (peak 260°C).","metaTitle":"Infineon CY9BF121KQN-G-AVE2 MCU, ARM Cortex-M3, 72MHz","metaDescription":"Infineon CY9BF121KQN-G-AVE2 ARM Cortex-M3 MCU, 72MHz, 96KB Flash, 16Kx8 RAM, -40 to +105°C, 48-QFN. Active lifecycle, ROHS3. Request a quote.","metaKeywords":null},"attributes":{"series":"FM3 MB9B120M","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"72MHz","Series":"FM3 MB9B120M","Package":"Tray","RAM Size":"16K x 8","Core Size":"32-Bit Single-Core","Peripherals":"DMA, LVD, POR, PWM, WDT","Connectivity":"CSIO, I²C, LINbus, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"35","Core Processor":"ARM® Cortex®-M3","Package / Case":"48-VFQFN Exposed Pad","Data Converters":"A/D 14x12b; D/A 2x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"96KB (96K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 105°C (TA)","Supplier Device Package":"48-QFN (7x7)","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.34","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.34000","currency":"USD"},{"qty":10,"price":"$5.69700","currency":"USD"},{"qty":25,"price":"$5.38600","currency":"USD"},{"qty":80,"price":"$4.66775","currency":"USD"},{"qty":260,"price":"$4.42835","currency":"USD"},{"qty":520,"price":"$3.97354","currency":"USD"},{"qty":1040,"price":"$3.35118","currency":"USD"},{"qty":2600,"price":"$3.18362","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0e1618d80f735886b1613b0dba50c751.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy CY9BF121KQN-G-AVE2 and check pricing?","answer":"Sourced to order against your BOM line through independent distribution. The part is active, so authorized-channel stock is the primary source; surplus inventory is quoted when available."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY9BF121KQN-G-AVE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY9BF121KQN-G-AVE2 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}}