Six unidirectional channels at 150 Mbps — the isolation link for SPI and parallel buses
The SI8660ED-B-IS: Six channels, all running in the same direction (Side 1 to Side 2), with a 150 Mbps data rate. That bandwidth handles SPI at full speed, UART at any baud rate, and parallel control signals without timing margin trouble. The 13 ns max propagation delay (tpLH / tpHL) and 4.5 ns pulse-width distortion keep the data eye open across the isolation barrier.
35 kV/µs common-mode transient immunity — why it matters for motor drives and inverters
A minimum 35 kV/µs common-mode transient immunity (CMTI) means the isolator holds its output state when a fast voltage transient slams across the barrier. In a motor-drive or inverter circuit, the IGBT switching edges generate common-mode dv/dt well above 10 kV/µs — this part has headroom to avoid data corruption or latch-up.
Drop-in compatibility with the SI8660BD-B-IS
The SI8660BD-B-IS shares the same 16-SOIC wide-body package, 150 Mbps data rate, 6/0 channel configuration, 5000 Vrms isolation, and 35 kV/µs CMTI. The two parts are functionally identical — the suffix difference (ED vs BD) reflects a manufacturing or test-code variant, not a parametric change. A board laid out for one accepts the other without a layout spin.