The MAX4821EUP+T is an 8-channel low-side N-channel driver from Analog Devices, built to switch relays, solenoids, and small inductive loads. Each output sinks up to 70 mA, with a typical on-resistance of 2 Ω. The load supply runs from 2.3 V to 5.5 V. The part accepts both parallel and serial interface control, which means you can drive it from a GPIO port or daisy-chain it on a shift-register bus. That dual-interface flexibility simplifies BOM consolidation — one driver IC covers both legacy and SPI-driven controller architectures.
It is not AEC-Q100 qualified, so keep it out of under-hood or chassis-domain automotive designs. The 20-TSSOP with exposed pad (20-TSSOP-EP) helps pull heat into the PCB copper pour — important if you are running all eight channels near the 70 mA limit in a still-air enclosure.
There is no last-time-buy or NRND flag, so it is safe to qualify into new production.