{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ27421YZFR-G1A","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ27421YZFR-G1A","canonicalUrl":"https://icboms.com/texas-instruments/BQ27421YZFR-G1A","factsUrl":"https://icboms.com/api/mcp/products/BQ27421YZFR-G1A","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Impedance Track™ series, BQ27421YZFR-G1A, single-cell Li-Ion battery monitor with I²C interface, 9-DSBGA package, -40°C to 85°C operating range.","salesMarkdown":"## Single-cell fuel gauge with Impedance Track™ The BQ27421YZFR-G1A is a battery monitor from the Impedance Track™ series, designed for single-cell Lithium Ion packs. Its I²C interface reports state-of-charge without the learning cycle typical of voltage-based gauges — the algorithm compensates for discharge rate, temperature, and cell aging from the first full charge. ## Package and footprint constraints Housed in a 9-bump DSBGA — a wafer-level chip-scale package that requires a clean PCB land pattern and a solder-mask-defined pad for reliable assembly. Surface-mount only; no through-hole variant. ROHS3 compliant.","metaTitle":"BQ27421YZFR-G1A Fuel Gauge – TI Impedance Track™","metaDescription":"Texas Instruments BQ27421YZFR-G1A battery monitor, Impedance Track™ series, I²C interface, 1-cell Li-Ion, -40°C to 85°C, 9-DSBGA. Active production.","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); Cut Tape (CT)","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":"BQ27421YZFR-G1","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"9-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.5700","priceTiers":[{"qty":1,"price":"$2.57000","currency":"USD"},{"qty":10,"price":"$2.30900","currency":"USD"},{"qty":25,"price":"$2.17840","currency":"USD"},{"qty":100,"price":"$1.85590","currency":"USD"},{"qty":250,"price":"$1.74264","currency":"USD"},{"qty":500,"price":"$1.52480","currency":"USD"},{"qty":1000,"price":"$1.26341","currency":"USD"},{"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-G1A/alternatives.json"},"ai":{"faq":[{"question":"Can BQ27421YZFR-G1A be used for a 2-cell lithium battery?","answer":"No. This part is specified for 1-cell (single-series) Lithium Ion packs only. For 2-to-4-cell designs, consider the BQ2084DBT-V143, which uses an SMBus interface and supports 2 to 4 cells."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ27421YZFR-G1A","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-G1A 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}}