SPI-specific isolation with 150 Mbps throughput
The SI86SS41BE-IS2 is a 4-channel SPI-compatible digital isolator from Skyworks Solutions, built on capacitive coupling technology. Its 3/1 input-to-output channel split maps directly to the SPI bus: three forward channels for MOSI, MISO, and SCLK, plus one reverse channel for the chip-select signal. Rated at 150 Mbps data rate with 14 ns typical propagation delay, this part keeps the SPI clock timing closure manageable even on long bus traces.
6000 Vrms reinforced isolation for industrial noise
The 6000 Vrms isolation voltage places this device in the reinforced isolation class per IEC 60747-17, suitable for motor-drive interfaces, solar inverters, and medical equipment where galvanic separation between the controller and high-voltage domain is mandatory. The 16-SOIC wide-body package (0.295-inch body width) provides the physical creepage distance to sustain that rating across the operating life. Common-mode transient immunity of 100 kV/µs minimum means the isolator rejects fast voltage transients — the kind generated by IGBT switching edges in a VFD — without corrupting the SPI data. At that CMTI figure, a 600 V/ns dV/dt event at the isolation barrier produces less than 6 mV of coupled noise at the receiver input. The unidirectional channel architecture means the direction is fixed at design time — no bidirectional data pin to configure.
Active lifecycle and compliance documentation
Skyworks lists the SI86SS41BE-IS2 as Active product status with ROHS3 compliance. The tube packaging (standard 16-SOIC wide-body) is the factory-shipped format; no reel or tape-and-reel variant is listed for this order code. If automated pick-and-place requires a reel, confirm the tube-to-reel transfer process with the assembly house before committing the BOM.