Why the 5000Vrms isolation and 25kV/µs CMTI matter in a motor-drive link
The FOD260LSV is a single-channel optoisolator from onsemi that delivers 5000Vrms isolation with a minimum common-mode transient immunity of 25kV/µs. In a variable-frequency drive or industrial inverter, that CMTI rating is what keeps the data link from glitching when the IGBT or SiC stage switches — ground-potential differences across the isolation barrier can exceed 1 kV/µs easily, and a part with lower immunity will corrupt the logic state. The open-collector Schottky-clamped output lets the receiver side pull down to a separate supply rail (3V to 5.5V,) without fighting the LED forward drop. The 10Mbps data rate is enough for most encoder feedback, PLC digital I/O, and isolated RS-485 links — but not for high-speed fieldbus like EtherCAT where you'd need 50Mbps+ parts.
Parametric deep-dive: timing, drive, and temperature
Propagation delay is 90ns max tpLH and 75ns max tpHL — the asymmetry means the output pulse width can shrink by up to 15ns per edge, so budget that skew when cascading multiple optoisolators in a daisy-chain or synchronising two channels. Rise/fall times of 22ns and 3ns keep the output edge clean enough for a 10Mbps NRZ signal. The LED forward voltage is 1.4V typ with a maximum forward current of 50mA. The output can sink 50mA per channel — enough to drive a small relay coil or a 5V logic input directly, but not a 24V PLC input without a pull-up resistor sized for the supply rail. Industrial temperature range from -40°C to 85°C covers most factory-floor enclosures, but not the 105°C ambient you'd see inside a solar inverter or under-hood automotive module. If your BOM demands extended temperature, look at the FOD260L series variants with wider range.
Sourcing and lifecycle: active production, no end-of-life clock
The 8-SMD Gull Wing package is a standard footprint shared with the HCPL2601 and other 8-pin DIP optoisolators, which simplifies second-sourcing if needed. Sourced per RFQ — no stock-holding claim or firm price published here.