Class AB headphone driver with digital audio interface
On-chip features include mute, shutdown, standby, thermal protection, and volume control, all accessible through the digital interface. The industrial temperature grade (-40°C to 85°C) covers outdoor telecom, portable test gear, and automotive cabin audio applications.
50 mW into 32 Ω — what that means for the BOM
The 50 mW per channel into 32 Ω is the headline output rating. The digital input (I²S/SPI) means the upstream processor or FPGA sends audio data directly, saving the cost and board area of an external DAC.
Active lifecycle — no obsolescence contingency needed
The LM4921ITL/NOPB is listed as Active with ROHS3 compliance. There is no NRND or last-time-buy notice on this part, so procurement can qualify it into a production BOM without planning for a near-term replacement.
Sourcing and availability
This part is sourced through independent distribution and quoted to order against an RFQ. Because the lifecycle is Active and there is no EOL risk, the lead time is generally stable — submit an RFQ for the quantity and target delivery window.