{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY14B101Q3-SFXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY14B101Q3-SFXI","canonicalUrl":"https://icboms.com/infineon/CY14B101Q3-SFXI","factsUrl":"https://icboms.com/api/mcp/products/CY14B101Q3-SFXI","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY14B101Q3-SFXI, NVSRAM, 1 Mbit, SPI, 40 MHz, 128K x 8, 2.7 V, SOIC-16, -40°C to 85°C.","salesMarkdown":"The Cypress CY14B101Q3-SFXI is a 1 Mbit non-volatile SRAM (NVSRAM) organized as 128K x 8 bits, accessed through an SPI interface running at 40 MHz. It combines the fast read/write cycle of a standard SRAM with non-volatile storage, so data is retained after power loss without a battery. Typical applications include configuration storage, parameter logging, and data buffering in industrial controllers, metering, and telecom equipment where the combination of fast write speed and non-volatility eliminates the need for EEPROM or battery-backed SRAM. ## SPI at 40 MHz — throughput and bus margin The 40 MHz SPI clock rate gives a raw serial throughput of 40 Mbit/s. For a 128 KB read or write, that translates to roughly 26 ms transfer time before the internal non-volatile store cycle. The SPI interface uses the standard four-wire protocol (SCK, SI, SO, CS), so it connects directly to any MCU or SoC with an SPI master. No special timing tweaks are needed at 40 MHz with a 3.3 V supply, but keep the trace length under 10 cm and add a series resistor near the source to damp reflections if the bus also drives a second SPI slave. ## NVSRAM vs FRAM — a genuine cross-shop decision The closest functional peer is the FM25VN10-G, a 1 Mbit serial FRAM from Cypress (now Infineon). Both parts are 1 Mbit non-volatile memories with an SPI interface at 40 MHz and the same 128K x 8 organization. The key difference is the storage technology: NVSRAM uses a SONOS transistor cell, while FRAM uses a ferroelectric capacitor. In practice, the NVSRAM offers essentially unlimited write endurance (the datasheet typically specifies 1e12 cycles), while FRAM endurance is also very high (1e14 cycles). The NVSRAM has a slightly higher supply voltage floor at 2.7 V versus 2.0 V for the FRAM. ## SOIC-16 package — board footprint and assembly The part comes in a 16-pin SOIC package, surface-mount only. The SOIC-16 footprint is standard and widely supported in assembly houses. No exposed pad or thermal slug — the package dissipates through the leads, so no special via stitching is needed.","metaTitle":"Cypress CY14B101Q3-SFXI NVSRAM, 1 Mbit SPI 40 MHz SOIC-16","metaDescription":"Cypress CY14B101Q3-SFXI 1 Mbit NVSRAM, SPI interface at 40 MHz, 128K x 8 organization, 2.7 V supply, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"has_mpn":"CY14B101","frame_size":"1Mbit","memory_type":"Non-Volatile","frequency_hz":"40000000.0","package_type":"Tube","Memory Format":"NVSRAM","mounting_type":"Surface Mount","interface_type":"SPI","product_status":"Active","lifecycle_stage":"eol_hot","supply_voltage_v":"2.7","Memory Organization":"128K x 8","Operating Temperature High":"-40°C to 85°C (TA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.06","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/43f37b37ee5864201ff8490887659006.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY14B101Q3-SFXI/alternatives.json"},"ai":{"faq":[{"question":"Can CY14B101Q3-SFXI replace CY14B101Q3-SF?","answer":"The CY14B101Q3-SFXI is the industrial-temperature variant of the CY14B101Q3-SF (commercial temperature). The two parts share the same package, pinout, and SPI interface, so the CY14B101Q3-SFXI is a direct replacement for the CY14B101Q3-SF in any design that requires the wider temperature range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY14B101Q3-SFXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY14B101Q3-SFXI when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}