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Texas Instruments BQ27421YZFR-G1D — Power Management (PMIC / Gate Driver)

BQ27421YZFR-G1D Battery Fuel Gauge IC – TI Impedance Track

MPNBQ27421YZFR-G1D
Active

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.

$1.2330Ref. price · indicative, final on quote
Texas Instruments BQ27421YZFR-G1D datasheet (PDF)
Packaging9-UFBGA, DSBGA
RoHSROHS3 Compliant
SeriesImpedance Track™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ27421YZFR-G1D specifications
ParameterValue
SeriesImpedance Track™
MountingSurface Mount
InterfaceI²C
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
FunctionBattery Monitor
Case9-UFBGA, DSBGA
Number of cells1
Battery chemistryLithium Ion

Product details

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.

Frequently asked questions

Does the BQ27421YZFR-G1D support I²C?

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.