What the 10 Mbps data rate and 5000 Vrms isolation mean for your design
The 6N137TSR2VM is a single-channel optocoupler from onsemi that delivers 10 Mbps data rate with 5000 Vrms isolation — the combination that makes it a standard choice for breaking ground loops in industrial fieldbus interfaces, motor drive feedback paths, and PLC digital I/O modules where you need to pass 10 MHz clock or serial data across a galvanic barrier without coupling noise back into the controller side.
Common-mode transient immunity — the spec that keeps the bus alive
Rated at 10 kV/µs minimum common-mode transient immunity, the 6N137TSR2VM rejects fast voltage spikes that couple across the isolation barrier when a motor drive switches IGBTs or a relay coil de-energises — without this margin, the optocoupler's output would glitch and the downstream controller would see a false edge. The 30 ns typical rise time and 10 ns typical fall time, paired with a 75 ns max propagation delay in both directions, keep the 10 Mbps data eye open across temperature and supply variation — the 75 ns delay sets the maximum cable length and bus cycle time in a Profibus or DeviceNet segment more than the data rate alone.
Package and board-fit — 8-SMD Gull Wing
Housed in an 8-SMD Gull Wing package (8-SMD, Gull Wing per the spec), the 6N137TSR2VM mounts on the standard SOIC-8 footprint with a 1.27 mm pitch — the same land pattern as a generic SO-8, so no special layout rules beyond the usual 5000 Vrms creepage clearance between primary and secondary sides.