The SI8645BB-B-IS1: It supports a data rate of 150Mbps with a typical propagation delay of 13 ns max in both directions, and pulse width distortion is held to 4.5 ns max — tight enough for high-speed SPI or UART links where skew between channels matters. The input-side configuration is 4/0 — all four channels face Side 1, so this variant is suited for isolating a bank of downstream signals from a single microcontroller domain.
Environmental ruggedness and transient immunity
Operating temperature spans -40°C to 125°C, covering industrial and some automotive under-hood environments — the 125°C ceiling means the part can sit near a hot power stage or in an engine bay without derating the isolation barrier. Common-mode transient immunity is rated at 35 kV/µs minimum, which is the key spec for motor-drive or inverter applications where fast-switching IGBTs couple large dV/dt onto the isolation barrier; a 35 kV/µs rating ensures the output does not glitch during a hard commutation event. Rise and fall times are 2.5 ns typical, which combined with the 13 ns propagation delay keeps the total channel latency under 18 ns — important for closed-loop control loops where every nanosecond of delay adds phase lag.
Package, mounting, and compliance
The part is supplied in tube packaging. Lifecycle status is Active, and the part is ROHS3 compliant. No isolated power is provided on-chip — the device requires separate supply rails on each side.