The FOD817CSD: With a current transfer ratio (CTR) spanning 200% to 400% at 5 mA forward current, this part provides consistent gain margin across the operating temperature range of -55°C to 110°C.
Parametric fit for isolated signal paths
Typical rise and fall times of 4 µs and 3 µs respectively mean the FOD817CSD switches cleanly at moderate data rates — suitable for status feedback, relay drivers, and isolated serial links where propagation delay below 10 µs is acceptable. The 50 mA continuous output current per channel is ample for driving a downstream gate or a small relay coil directly, without a buffer transistor.