{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ27421YZFR-G1D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ27421YZFR-G1D","canonicalUrl":"https://icboms.com/texas-instruments/BQ27421YZFR-G1D","factsUrl":"https://icboms.com/api/mcp/products/BQ27421YZFR-G1D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ27421YZFR-G1D, Impedance Track series, single-cell Li-ion battery fuel gauge, I²C interface, 9-DSBGA package, -40°C to 85°C operating range.","salesMarkdown":"## What this fuel gauge does for a single-cell Li-ion pack The BQ27421YZFR-G1D is a single-cell Li-ion battery fuel gauge from TI's Impedance Track series, communicating over an I²C interface. It monitors charge and discharge in portable equipment where knowing the remaining capacity matters more than a simple voltage-based estimate. If your BOM calls for an automotive-grade gauge, this isn't it — but for a consumer or industrial portable, the range is sufficient. No stock-holding claim — we quote to order.","metaTitle":"BQ27421YZFR-G1D Battery Fuel Gauge IC – TI Impedance Track","metaDescription":"Texas Instruments BQ27421YZFR-G1D single-cell Li-ion battery fuel gauge with Impedance Track, I²C interface, 9-DSBGA package, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"Impedance Track™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"Impedance Track™","Package":"Tape & Reel (TR)","Function":"Battery Monitor","Interface":"I²C","Mounting Type":"Surface Mount","Package / Case":"9-UFBGA, DSBGA","Product Status":"Active","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"-","Battery Chemistry":"Lithium Ion","Base Product Number":"BQ27421","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"9-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2330","priceTiers":[{"qty":3000,"price":"$1.23300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/21a7be246ef4b65e44fc22133d69db26.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ27421YZFR-G1D/alternatives.json"},"ai":{"faq":[{"question":"Does the BQ27421YZFR-G1D support I²C?","answer":"Yes, the I²C interface is the only communication bus — the host MCU reads capacity, voltage, and current data over it. No SMBus or HDQ alternative on this variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ27421YZFR-G1D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ27421YZFR-G1D 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}}