{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LFE5U-85F-6BG381C","brand":"Lattice Semiconductor Corporation","brandSlug":"lattice-semiconductor-corporation","productSlug":"LFE5U-85F-6BG381C","canonicalUrl":"https://icboms.com/lattice-semiconductor-corporation/LFE5U-85F-6BG381C","factsUrl":"https://icboms.com/api/mcp/products/LFE5U-85F-6BG381C","rawCanonicalId":null},"summary":{"shortDescription":"Lattice Semiconductor Corporation ECP5 FPGA, LFE5U-85F-6BG381C, 84,000 logic elements, 205 I/O, 3,833,856 total RAM bits, 381-CABGA 17×17 mm, tray, 0°C~85°C, ROHS3.","salesMarkdown":"## 84,000 logic elements in a 17×17 mm footprint The LFE5U-85F-6BG381C is a Lattice ECP5 FPGA packing 84,000 logic elements and 21,000 LABs/CLBs into a 381-ball CABGA package measuring 17×17 mm. The 3.8 Mbit block RAM gives you room for moderate-size FIFOs, line buffers, or coefficient tables without reaching for external memory. With 205 user I/O in that ball count, the I/O-to-logic ratio leans toward logic-heavy designs — think image-sensor interfaces, motor-control loops, or bridge functions where the gate count matters more than the pin count. ## Core supply and temperature grade — the design constraints The core voltage rail is 1.045 V to 1.155 V — a tight 110 mV window that demands a clean 1.1 V regulator with good transient response. The operating temperature range is 0°C to 85°C, so this part is rated for commercial/industrial indoor environments, not extended or automotive. ## Sourcing and cross-reference reality This is a single-source Lattice part — no official second-source or pin-compatible alternative from another vendor. The closest peer in the same 381-CABGA footprint is the LFE5UM-45F-8BG381C, which halves the logic to 44,000 elements and the block RAM to 2 Mbit, but keeps the same 203 I/O and supply voltage. If your design was originally specified around the 45K variant and you need more headroom, the LFE5U-85F-6BG381C drops into the same PCB footprint without a board spin — the ball map is identical.","metaTitle":"Lattice LFE5U-85F-6BG381C ECP5 FPGA, 84K LEs, 205 I/O","metaDescription":"Lattice Semiconductor LFE5U-85F-6BG381C ECP5 FPGA, 84,000 logic elements, 205 I/O, 3.8 Mbit block RAM, 381-CABGA, active production, ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":"ECP5","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["FPGA / CPLD & Programmable Logic"],"specifications":{"Mfr":"Lattice Semiconductor Corporation","Series":"ECP5","Package":"Tray","Mounting Type":"Surface Mount","Number of I/O":"205","Package / Case":"381-FBGA","Product Status":"Active","Total RAM Bits":"3833856","lifecycle_stage":"unknown","Voltage - Supply":"1.045V ~ 1.155V","Base Product Number":"LFE5U-85","Number of LABs/CLBs":"21000","Operating Temperature":"0°C~85°C(TJ)","Supplier Device Package":"381-CABGA (17x17)","Number of Logic Elements/Cells":"84000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$49.8000","priceTiers":[{"qty":1,"price":"$49.80000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/496575ee6a44fd98e19810ac630165b2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LFE5U-85F-6BG381C/alternatives.json"},"ai":{"faq":[{"question":"Will LFE5U-85F-6BG381C drop into a board designed for LFE5UM-45F-8BG381C?","answer":"Yes, both parts share the same 381-CABGA 17×17 mm package and ball map. The LFE5U-85F-6BG381C has 84,000 logic elements versus 44,000 on the 45K variant, but the I/O count (205 vs 203) and supply voltage (1.045V–1.155V) are functionally identical. No PCB layout change is needed for a density upgrade."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/lattice-semiconductor-corporation/LFE5U-85F-6BG381C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/lattice-semiconductor-corporation/LFE5U-85F-6BG381C 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}}