{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"AT93C46EN-SH-B","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"AT93C46EN-SH-B","canonicalUrl":"https://icboms.com/microchip/AT93C46EN-SH-B","factsUrl":"https://icboms.com/api/mcp/products/AT93C46EN-SH-B","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology AT93C46EN-SH-B EEPROM, 1Kbit (64 x 16), 3-Wire Serial, 2 MHz, 1.8V-5.5V, -40°C to +85°C, 8-SOIC (0.154\", 3.90mm Width), Tube.","salesMarkdown":"## 1Kbit EEPROM with 3-wire Microwire interface The Microchip Technology AT93C46EN-SH-B is a 1Kbit serial EEPROM organized as 64 words of 16 bits each, accessed through a 3-wire serial interface (Microwire protocol). The 2 MHz maximum clock frequency delivers a read throughput of roughly 250 kbit/s, adequate for storing configuration parameters, calibration constants, or serial numbers in embedded systems. Housed in an 8-SOIC narrow-body package (3.90 mm width, 0.154\" pitch), the footprint is a JEDEC standard shared by hundreds of EEPROM and logic parts — a single PCB land pattern covers multiple second-source options. The write cycle time of 5 ms per word or page means a full 64-word rewrite takes roughly 320 ms; budget this into the firmware update or calibration routine to avoid timing violations on the bus. ## Active lifecycle and compliance status ROHS3 compliant per the listing, meeting the EU RoHS directive's current substance restrictions without an exemption claim. Supplied in tube packaging (standard 8-SOIC tube), which is the common format for hand-loading or small-batch assembly; reel and tape options exist for the same die in the AT93C46EN-SH-T variant if automated pick-and-place volume demands it.","metaTitle":"Microchip AT93C46EN-SH-B 1Kbit EEPROM, 3-Wire, 8-SOIC","metaDescription":"Microchip AT93C46EN-SH-B 1Kbit EEPROM, 3-Wire serial interface, 2 MHz clock, 1.8V-5.5V supply, -40°C to +85°C, 8-SOIC. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Technology":"EEPROM","Memory Size":"1Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Clock Frequency":"2 MHz","lifecycle_stage":"eol_hot","Memory Interface":"3-Wire Serial","Voltage - Supply":"1.8V ~ 5.5V","Memory Organization":"64 x 16","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Write Cycle Time - Word, Page":"5ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.28","stockQuantity":18,"priceTiers":[{"qty":1,"price":"$0.28000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ad4dd7b57501c7acd5e4f278f45adccf.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will AT93C46EN-SH-B drop into a board designed for AT24C08D-SSHM-B without rewiring?","answer":"No — the AT93C46EN-SH-B uses a 3-wire Microwire interface, while the AT24C08D-SSHM-B uses I²C. The pin assignments, bus protocol, and control logic are different. A board designed for the I²C AT24C08D cannot accept the Microwire AT93C46EN without a layout change and firmware rewrite."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/AT93C46EN-SH-B","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/AT93C46EN-SH-B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}