What this 4-channel capacitive isolator does on your board
The MAX14931EAWE+ is a 4-channel general-purpose digital isolator from Maxim Integrated, built with capacitive coupling technology. It passes digital signals across a 2750 Vrms isolation barrier at up to 25 Mbps. The wide-body 16-SOIC package (0.295-inch body width) gives the creepage distance needed for the 2750 Vrms rating. Propagation delay is 27.5 ns typical on the low-to-high edge and 28.8 ns on the high-to-low, with pulse-width distortion held to 2.6 ns max — tight enough for most SPI and UART isolations at the rated data rate. Rise and fall times are 2 ns typical, so the output edges stay clean into a modest capacitive load.
25 kV/µs CMTI — why it matters for motor drives and inverters
Common-mode transient immunity is a minimum of 25 kV/µs (typical performance is higher). That figure tells you the isolator won't falsely toggle an output when a fast high-voltage edge slams across the isolation barrier.
Temperature range and package — board-fit notes
Rated for -40°C to 125°C operating temperature. The 16-SOIC wide-body footprint is common; the supplier device package is simply 16-SOIC. No isolated DC-DC converter is built in — you supply the isolated power rails externally.