{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C199C-12ZXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C199C-12ZXCT","canonicalUrl":"https://icboms.com/infineon/CY7C199C-12ZXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C199C-12ZXCT","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C199C-12ZXCT, 256Kbit asynchronous SRAM, 32K x 8 organization, 12 ns access time, 4.5V–5.5V supply, 28-TSOP I package, Tape & Reel, commercial temperature range.","salesMarkdown":"The CY7C199C-12ZXCT is a 256Kbit asynchronous SRAM organised as 32K x 8 bits, meaning it stores 32,768 words of 8 bits each — a common size for microcontroller data buffers, cache tag storage, or FPGA configuration shadow memory in legacy 5 V systems. Its 12 ns access time means the memory can complete a read or write cycle in 12 ns, which corresponds to a maximum bus speed of about 83 MHz — fast enough for many mid-range processors and DSPs from the late 1990s and early 2000s. The parallel interface uses separate address and data buses, so it connects directly to a processor's memory controller without serialisation overhead — simpler to route than a serial RAM but uses more board traces. ## Supply voltage and temperature grade — design constraints If your system runs on 3.3 V logic, you will need level translators or a separate 5 V rail for the memory. That rules out outdoor enclosures, engine bays, or unheated warehouses — the part is designed for office equipment, lab instruments, and indoor telecom racks. Infineon lists the CY7C199C-12ZXCT as Obsolete, which means the manufacturer has stopped production and no further wafer starts or assembly runs are planned. The package is 28-TSOP I in Tape & Reel — a surface-mount footprint that is still common, so rework and replacement are straightforward if you have existing boards.","metaTitle":"CY7C199C-12ZXCT SRAM – 256Kbit, 12 ns","metaDescription":"CY7C199C-12ZXCT is an Infineon 256Kbit asynchronous SRAM with 12 ns access time, 4.5V–5.5V supply, 28-TSOP I package. Obsolete – sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR)","Technology":"SRAM - Asynchronous","Access Time":"12 ns","Memory Size":"256Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"28-TSSOP (0.465\\\", 11.80mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"4.5V ~ 5.5V","Base Product Number":"CY7C199","Memory Organization":"32K x 8","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"28-TSOP I","Write Cycle Time - Word, Page":"12ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b500fa0ee687a89ce00255378ab4eee0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order CY7C199C-12ZXCT or check stock?","answer":"Submit an RFQ with your target quantity. Since the part is Obsolete, we source it through independent channels — availability and price are confirmed per inquiry. No live stock count is published here."},{"question":"Is there a direct replacement for CY7C199C-12ZXCT?","answer":"No official successor is listed by Infineon for this exact order code. For a pin-compatible alternative, look at other 32K x 8 asynchronous SRAMs in 28-TSOP I with 12 ns or faster access time and 4.5 V–5.5 V supply — for example, the Alliance Memory AS7C256A-12TIN or ISSI IS61C256AH-12TLI. Verify the pinout and timing against your board before committing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C199C-12ZXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C199C-12ZXCT 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}}