Dual-channel push-pull optoisolator for 3.3V/5V logic interfaces
The FOD8012AR2 from onsemi is a two-channel optoisolator with push-pull totem-pole outputs, rated for 15 Mbps data rate and 3750 Vrms isolation. It accepts supply voltages of 3V to 3.6V on one side and 4.5V to 5.5V on the other, so it can bridge a 3.3V MCU to a 5V fieldbus transceiver without external level shifters. Each channel can sink or source 10 mA at the output, and the typical rise/fall time of 6.5 ns keeps the signal edge clean at 15 Mbps. The propagation delay max of 60 ns both ways gives predictable timing for synchronous serial links like SPI or RS-485.
Common-mode transient immunity and temperature range
The minimum common-mode transient immunity is 20 kV/µs, which means the part can reject fast voltage spikes between input and output grounds — essential in motor drives, inverters, or any environment with high dV/dt switching noise.
For reel quantities (typical for production runs) or smaller cut-tape samples, submit a request against your BOM line. The dual supply range and 15 Mbps data rate mean this part can serve as a drop-in for many older 10 Mbps optoisolators where speed margin is needed.