The Maxim Integrated MAX14934FAWE+ is a 4-channel, unidirectional digital isolator using capacitive coupling technology. It delivers 150Mbps data rate across a 5000Vrms isolation barrier, with propagation delay of 7.5ns max and pulse width distortion of 1ns max. The supply range spans 1.71V to 5.5V, letting it bridge voltage domains from 1.8V logic up to 5V systems.
The 150Mbps data rate is the headline throughput spec. At this speed the isolator handles full-rate SPI clock lines (up to 75 MHz DDR or 150 Mbps SDR) without bit errors. The 1.71V to 5.5V supply range means the part operates on a 5V rail directly — no external level shifter needed when interfacing 5V peripherals or legacy logic. The 2ns typical rise/fall time keeps signal integrity clean at these edge rates, but the fast edges also mean the PCB layout needs controlled impedance traces if the isolation channel runs longer than a few centimetres.
5000Vrms isolation is a reinforced-grade rating for mains-connected equipment. It satisfies the 250V working voltage requirement for industrial and medical PSUs with margin. The 25kV/µs common-mode transient immunity (CMTI) is the spec that matters in motor-drive and inverter applications: fast-switching SiC and GaN stages generate common-mode voltage spikes that can corrupt data across a weak isolation barrier. At 25kV/µs typical, the MAX14934FAWE+ holds the data path clean through those transients. The 7.5ns max propagation delay (7.4ns tpHL) gives 13.3% of a 150 Mbps bit period as timing margin — enough for most isolated SPI links, but check setup/hold if the bus runs at full rate with multiple isolators in series.
No end-of-life risk for new designs. ROHS3 compliant.