10 Mbps open-collector optoisolator, now obsolete
The onsemi 6N137SV is a single-channel optoisolator with an open-collector output, rated for 10 Mbps data rate and 2500 Vrms isolation. Its 75 ns max propagation delay (tpLH/tpHL) suits it for high-speed digital isolation in industrial fieldbus interfaces and PLC digital input modules, where the open-collector stage drives a pull-up resistor to the logic rail.
Lifecycle reality — obsolete, sourced on RFQ
onsemi lists the 6N137SV as obsolete.
Key ratings and what they mean for the BOM
The 10 Mbps data rate and 75 ns propagation delay mean this part keeps up with high-speed serial buses like CAN and RS-485 without adding a full bit-time of skew. The 2500 Vrms isolation (tested per UL 1577) provides basic galvanic separation between a 5 V logic side and a separate field-side supply — enough for functional isolation in non-medical industrial controls. Common mode transient immunity (CMTI) is specified at 10 kV/µs minimum — a typical figure for this class of optoisolator. In a motor-drive application where the inverter switches at several kV/µs, this CMTI prevents the output from falsely toggling during the transient edge. The open-collector output sinks 50 mA max per channel. The output transistor pulls the collector low when the LED is on; an external pull-up resistor to the load supply sets the logic-high level. This output type allows the optoisolator to interface with different logic families (5 V, 3.3 V) by choosing the appropriate pull-up voltage.
The Gull Wing leads provide visual solder-joint inspection access.