{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY15B108QN-40SXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY15B108QN-40SXI","canonicalUrl":"https://icboms.com/infineon/CY15B108QN-40SXI","factsUrl":"https://icboms.com/api/mcp/products/CY15B108QN-40SXI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Excelon™-Auto series CY15B108QN-40SXI, 8Mbit SPI FRAM, 40MHz clock, 1.8V-3.6V supply, -40°C to 85°C, 8-SOIC package, AEC-Q100 qualified.","salesMarkdown":"## Package and mounting The Infineon CY15B108QN-40SXI is an 8 Mbit ferroelectric RAM (FRAM) organized as 1M x 8 bits, accessed over a standard SPI bus at up to 40 MHz. It sits in the Excelon™-Auto family, which means it carries AEC-Q100 qualification for automotive use. Unlike EEPROM or Flash, FRAM writes at bus speed with no erase cycle and draws no extra time for a page program — the 40 MHz SPI clock is the write speed. The 1.8V to 3.6V supply range lets it run on a single 1.8V or 3.3V rail without a regulator. ## Why the AEC-Q100 grade matters for your BOM The AEC-Q100 qualification (part of the Excelon™-Auto series) is the main reason to pick this part over a standard FRAM like the FM25V20A-DG. It means the part has passed the automotive stress tests: extended temperature cycling, high-temperature operating life, and ESD robustness. If your design targets a vehicle ECU, ADAS module, or any safety-related system that requires AEC-Q100 parts on the AVL, this part fits without a waiver. The 8 Mbit density is the largest in the Excelon™-Auto SPI FRAM lineup, so it is the choice for data logging, calibration storage, or event recorder buffers where you need non-volatile writes at bus speed. ## Package and supply — field-fit notes The supply range from 1.8V to 3.6V means it can sit on a 1.8V MCU rail or a 3.3V system rail without level shifters on the SPI lines, as long as the host's I/O voltage is compatible. At 40 MHz, the SPI bus timing is tight but within the range of most Cortex-M SPI peripherals; check the setup/hold times against your MCU's datasheet if you are running at the full clock rate.","metaTitle":"Infineon CY15B108QN-40SXI 8Mbit SPI FRAM, AEC-Q100, 40MHz","metaDescription":"Infineon CY15B108QN-40SXI 8Mbit SPI FRAM, AEC-Q100 qualified, 40MHz clock, 1.8V-3.6V, -40°C to 85°C, 8-SOIC.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100, Excelon™-Auto, F-RAM™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"Automotive, AEC-Q100, Excelon™-Auto, F-RAM™","Package":"Tube","Technology":"FRAM (Ferroelectric RAM)","Memory Size":"8Mbit","Memory Type":"Non-Volatile","Memory Format":"FRAM","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.209\\\", 5.30mm Width)","Clock Frequency":"40 MHz","lifecycle_stage":"eol_hot","Memory Interface":"SPI","Voltage - Supply":"1.8V ~ 3.6V","Memory Organization":"1M x 8","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$37.09","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$37.09000","currency":"USD"},{"qty":10,"price":"$34.39600","currency":"USD"},{"qty":25,"price":"$33.16760","currency":"USD"},{"qty":50,"price":"$32.34140","currency":"USD"},{"qty":100,"price":"$28.33840","currency":"USD"},{"qty":250,"price":"$27.55480","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7d9197eb74aad51c144a728925d8aef7.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the power supply range for CY15B108QN-40SXI?","answer":"The supply voltage range is 1.8V to 3.6V. It operates from a single rail, so you can power it from a 1.8V or 3.3V supply without an extra regulator."},{"question":"Does CY15B108QN-40SXI have any equivalent or replacement parts?","answer":"Within the same Excelon™-Auto family, the CY15B104Q-SXI is a 4 Mbit variant with the same SPI interface, 40 MHz clock, and 8-SOIC package. It is a drop-in replacement if you need half the density. For a non-automotive alternative, the FM25V20A-DG is a 2 Mbit FRAM in the same footprint but lacks AEC-Q100 qualification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY15B108QN-40SXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY15B108QN-40SXI 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}}