{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AT28BV64B-20JU","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"AT28BV64B-20JU","canonicalUrl":"https://icboms.com/microchip/AT28BV64B-20JU","factsUrl":"https://icboms.com/api/mcp/products/AT28BV64B-20JU","rawCanonicalId":null},"summary":{"shortDescription":"Microchip AT28BV64B-20JU, 64Kbit parallel EEPROM, 8K x 8 organization, 200 ns access time, 2.7V–3.6V supply, 32-PLCC (J-Lead), -40°C to 85°C operating temperature.","salesMarkdown":"## 64Kbit parallel EEPROM with 200 ns access — still a live part The Microchip AT28BV64B-20JU is a 64Kbit (8K x 8) parallel EEPROM in a 32-PLCC (J-Lead) package, built for non-volatile storage in 3.3V systems. Its 200 ns access time keeps it compatible with legacy 8-bit MCU buses and CPLD glue logic without wait-state penalties. The part is listed as Active, so it remains a legitimate new-design choice for sockets that need a byte-wide, in-system-reprogrammable memory. ## Supply rail and temperature — 2.7V–3.6V, industrial range Runs from 2.7V to 3.6V, which is the 3.3V logic rail with margin for brownout. If your legacy design used the 5V AT28C64B, this part will not drop in without a regulator change — the supply is strictly 3.3V max. ## Write cycle and programming in the field Word and page writes complete in 10 ms. That is slow enough that firmware-update routines need to poll the ready/busy pin or insert a delay loop, but fast enough for configuration storage and calibration tables. The parallel interface means any 8-bit MCU or FPGA with a byte-wide bus can program it without an I²C or SPI bit-bang — handy for field upgrades if the socket is accessible. ## Package and handling — 32-PLCC, socket-friendly The 32-PLCC (J-Lead) footprint (13.97x11.43 mm body) is a surface-mount package that also fits production sockets — a real advantage for field-service swaps or firmware development where you want to pull and reprogram without desoldering. The J-Lead form gives good visual solder-joint inspection. The part is ROHS3 compliant.","metaTitle":"AT28BV64B-20JU 64Kbit Parallel EEPROM, 200 ns Access","metaDescription":"Microchip AT28BV64B-20JU 64Kbit (8K x 8) parallel EEPROM, 200 ns access time, 2.7V–3.6V supply, 32-PLCC, -40°C to 85°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Package":"Tube","Technology":"EEPROM","Access Time":"200 ns","Memory Size":"64Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Surface Mount","Package / Case":"32-LCC (J-Lead)","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"2.7V ~ 3.6V","Memory Organization":"8K x 8","Operating Temperature":"-40°C ~ 85°C (TC)","Supplier Device Package":"32-PLCC (13.97x11.43)","Write Cycle Time - Word, Page":"10ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.45","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.45000","currency":"USD"},{"qty":25,"price":"$5.23000","currency":"USD"},{"qty":100,"price":"$5.05000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c06d64c732fc16c4a7e3dbb5d228ba50.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is AT28BV64B-20JU a direct replacement for AT28C64B?","answer":"No — the AT28BV64B-20JU operates at 2.7V–3.6V, while the AT28C64B is a 5V part. They share the same 64Kbit parallel EEPROM function and 32-PLCC footprint, but the supply voltage difference means a direct swap requires a regulator change. Check your board's Vcc rail before substituting."},{"question":"Is AT28BV64B-20JU 5V tolerant?","answer":"The evidence does not list 5V tolerance. With a maximum supply of 3.6V, driving the inputs above that risks latch-up or oxide damage. Assume it is not 5V tolerant unless the datasheet explicitly states otherwise."},{"question":"What is the programming time for AT28BV64B-20JU?","answer":"The write cycle time for a word or page is 10 ms. That is the time from the end of the write sequence until the part is ready for the next operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/AT28BV64B-20JU","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/AT28BV64B-20JU 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}}