What this part is and where it fits
The Texas Instruments LM48861TM is a Class AB stereo headphone amplifier from the Boomer® series, delivering 24mW per channel into a 16 Ω load. It operates from a 1.2 V to 2.8 V supply rail, making it a direct fit for single-cell Li-ion or dual-cell alkaline battery-powered audio paths — portable speakers, gaming headsets, handheld medical monitors, or any design where the audio output stage must run off the same rail as the codec or baseband processor. The output stage is Class AB, which means it avoids the crossover distortion of Class B while keeping quiescent current lower than a pure Class A design; for a headphone driver the trade-off is acceptable efficiency for clean low-level signal reproduction.
Package and temperature — what they mean for the build
Housed in a 12-bump WFBGA / DSBGA package (supplier device package 12-DSBGA), this part is built for dense, low-profile PCBs. The -40°C to 85°C operating range covers industrial and outdoor-temperature environments.
Sourcing and lifecycle — active, no LTB clock ticking
The LM48861TM carries an Active product status and is ROHS3 compliant. There is no last-time-buy notice or NRND flag on this part. Sourced through independent distribution, availability and pricing are confirmed at quote time.