Package and mounting — what to expect on the bench
The 8-SOIC-EP package has an exposed pad on the bottom. That pad needs a thermal land on the PCB and a via stitch to the ground plane to pull heat out of the die. On a standard 8-SOIC footprint without the pad connected, the part will run hotter and may hit thermal shutdown at high common-mode voltage or high shunt current. The exposed pad also serves as the return path for the input bias current — 175 µA typical — so keep the PCB layout clean under the part. The part is surface-mount only; no socket option for field swaps without a hot-air station.
Lifecycle and compliance
The MAX9918ASA+T is marked Active in production and is ROHS3 compliant. No end-of-life notice or last-time-buy window has been issued. For new designs or BOM freeze, this part is a safe choice — no imminent LTB risk. The ROHS3 compliance covers the full set of restricted substances, so it passes European and most global environmental requirements without an exemption.
Sourcing and availability
This part is sourced through independent distribution and quoted to order against an RFQ. It is offered in Tape & Reel (TR) and Cut Tape (CT) options — the CT option lets you buy single units or small quantities without committing to a full reel. For production volumes, the TR option is the standard.