The LM4818MX/NOPB: The part carries RoHS3 compliance, so it meets the EU RoHS exemption-free standard for lead-free assembly.
Output power and load — what 350 mW into 16 Ω means
Rated 350 mW continuous into a 16 Ω load from a single channel — this is the maximum output power at the specified load impedance, not a per-channel sum. The mono output drives one speaker or earpiece. The output swing is supply-rail limited; at 3.3 V the available power into 16 Ω is lower than the 350 mW headline figure, which is specified at the upper end of the supply range.
Package and board-fit — 8-SOIC footprint
The supplier device package is 8-SOIC — no thermal pad, so the die's heat flows through the leadframe and the PCB copper. The CT option suits prototype or low-volume builds.
Depop and shutdown — what the features do
The Depop feature suppresses the audible pop on power-up and power-down by ramping the output bias — no external muting transistor needed. The Shutdown pin pulls the amplifier into a low-current state (typically <1 µA) for battery-powered designs where the audio path is gated by a microcontroller GPIO.