{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"54F189DLQB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"54F189DLQB","canonicalUrl":"https://icboms.com/texas-instruments/54F189DLQB","factsUrl":"https://icboms.com/api/mcp/products/54F189DLQB","rawCanonicalId":null},"summary":{"shortDescription":"54F189DLQB, 54F series, Standard SRAM, 16 x 4 organization, 32 ns access time, parallel interface, 4.5 V supply, Through Hole, Bulk, -55 to 125°C operating temperature.","salesMarkdown":"The 54F189DLQB is a 16 x 4 standard SRAM from the 54F series, a military-temperature logic family designed for high-reliability systems. It offers a 32 ns access time over the full -55 to 125°C range, making it suitable for avionics, missile guidance, satellite, and downhole applications where commercial-grade parts cannot survive. The parallel interface and 4.5 V supply align with legacy 5 V TTL bus architectures common in defence and aerospace platforms. The 32 ns access time sets the read-cycle window for the memory bus. In a system clocked at 20 MHz or slower, this part meets the timing budget without wait states. The write cycle time is 37.5 ns, which paces the write strobe width. For a military-temperature SRAM from the 54F series, this is notable — many legacy logic parts have moved to NRND or EOL.","metaTitle":"54F189DLQB 54F Series SRAM, 32 ns Access, -55 to 125°C","metaDescription":"54F189DLQB is a 16x4 standard SRAM with 32 ns access time, parallel interface, 4.5 V supply, and -55 to 125°C operating range. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"series":"54F","frame_size":"64bit","Access Time":"32 ns","memory_type":"Volatile","package_type":"Bulk","Memory Format":"RAM","mounting_type":"Through Hole","interface_type":"Parallel","product_status":"Active","lifecycle_stage":"eol_hot","supply_voltage_v":"4.5","Memory Organization":"16 x 4","Operating Temperature High":"-55°C to 125°C (TA)","Write Cycle Time - Word, Page":"37.5ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.49","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d4da037965418ac180918ffa4a83d425.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/54F189DLQB/alternatives.json"},"ai":{"faq":[{"question":"What is the access time and operating temperature of 54F189DLQB?","answer":"The 54F189DLQB has a 32 ns access time and is rated for operation from -55 to 125°C ambient."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/54F189DLQB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/54F189DLQB 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}}