{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C199C-20ZI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C199C-20ZI","canonicalUrl":"https://icboms.com/infineon/CY7C199C-20ZI","factsUrl":"https://icboms.com/api/mcp/products/CY7C199C-20ZI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C199C-20ZI asynchronous SRAM, 256Kbit (32K x 8), 20 ns access time, 4.5 V – 5.5 V, -40°C to 85°C, 28-TSOP I, bag packaging.","salesMarkdown":"## 256Kbit async SRAM for 5 V parallel bus — 20 ns access sets the read-cycle budget The CY7C199C-20ZI: The 20 ns access time is the address-to-data-valid delay — it sets the minimum read-cycle time on a 5 V parallel bus. A 20 ns access means the bus controller must hold the address stable for at least 20 ns before latching the data; any faster bus cycle misses the data window. ## Obsolete — no official successor on record Infineon lists the CY7C199C-20ZI as Obsolete. No official replacement part number has been published. The 28-TSOP I footprint and 5 V ±10% supply are the constraints for any functional replacement; a pin-compatible drop-in from another manufacturer would need to match the 32K x 8 organization, 20 ns or faster access, and the same package outline. ## Timing parameters that govern bus fit The 20 ns write cycle time (word, page) matches the read access time — the write pulse width (tWP) and address setup-to-write-end (tAW) are the critical parameters for bus-turnaround timing on a shared address/data bus. The asynchronous interface means no clock, no refresh overhead; the part is ready to read or write as soon as the address and chip-select are stable. ## Package and footprint — 28-TSOP I, 11.80 mm body width The 28-TSOP I (0.465-inch / 11.80 mm body width) uses a 1.27 mm pitch, standard for TSOP I SRAMs in this density. The surface-mount footprint is shared with other 28-pin TSOP I asynchronous SRAMs from the same era — a replacement candidate must match the 11.80 mm body width and 1.27 mm lead pitch to fit the existing PCB layout without a board spin.","metaTitle":"CY7C199C-20ZI 256Kbit 5V Async SRAM, 20 ns, Infineon","metaDescription":"CY7C199C-20ZI 256Kbit (32K x 8) asynchronous SRAM, 20 ns access time, 4.5-5.5 V, -40°C to 85°C, 28-TSOP I.","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":"Bag","Technology":"SRAM - Asynchronous","Access Time":"20 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":"-40°C ~ 85°C (TA)","Supplier Device Package":"28-TSOP I","Write Cycle Time - Word, Page":"20ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/aea969ef93c389c22f1244d5fae0f19f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C199C-20ZI obsolete?","answer":"Yes, Infineon lists the CY7C199C-20ZI as Obsolete. No official successor part number has been announced."},{"question":"What is the replacement for CY7C199C-20ZI?","answer":"No official replacement has been published by Infineon. Availability is confirmed against an RFQ through independent channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C199C-20ZI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C199C-20ZI when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T10:55:41.550Z","lastPublished":"2026-07-20T10:55:41.550Z","indexable":true}}