1Mbps isolation barrier for noisy industrial buses
The PS9313L-V-AX is a 1-channel digital optocoupler from Renesas, built for isolating a 1Mbps data line with an open collector output. The 5000Vrms isolation rating means it can sit on a safety barrier between a 24V fieldbus and a 3.3V controller without risking a ground loop or a transient punch-through. With a common-mode transient immunity of 15kV/µs minimum, this part handles the noise spikes from a motor drive or a switching power supply without false-toggling the output. That CMTI spec is what keeps the data valid when the ground plane jumps.
Package and board-fit: 6-SOIC stretch body
The package is a 6-SOIC with a 6.80mm body width — wider than the standard SOIC-8, so the pad layout is specific. The supplier device package is listed as 6-SDIP, but the physical footprint is the 6-SOIC stretch body; the pin pitch is the standard 1.27mm, but the body width means the landing pattern on the PCB is wider than a typical SOIC-8.