8-channel low-side driver with SPI — parametric fit for relay and solenoid banks
The MAX4820ETP+T is an 8-channel low-side N-channel driver from Analog Devices, designed to drive relays, solenoids, and other inductive loads under SPI control. The 1:8 input-to-output ratio means a single SPI chip-select line controls all eight channels, reducing GPIO demand on the host controller.
Temperature grade and package — board-fit for industrial and automotive environments
The 2 Ohm Rds(on) at 25°C doubles roughly at 150°C junction — a 70 mA load dissipates about 10 mW at 25°C but 20 mW at temperature, still well within the package's thermal budget.