Confirming STRB_ISO active-low behavior and 6N137 interface

Muu

Looking at Figure 3 on the OAK-D Pro PoE datasheet (captioned "Isolated FSYNC output" assuming that's a typo for STROBE): I read the iso side as an LTV-356T driving a DDTC114YCA open-collector, so my plan is to pull STRB_ISO up to my 5V logic rail (~1–2.2k), reference to GND_ISO on pin 7, and treat the signal as active-low during exposure, feeding into a 6N137. Three things I'd like to confirm: (1) is active-low-during-exposure correct? (2) is there a spec'd max sink current / recommended pull-up, or is "stay well under the DDTC114YCA's rating" the answer? (3) given the LTV-356T's µs-class edges, is there a recommended pull-up value for fastest fall/rise at short exposuress

Oskar-Luxonis

Hey Muu - sorry for later relpy. We’ll need to confirm the active polarity from the software side, since the isolation/output stage inverts the signal. So I would not state active-low-during-exposure as guaranteed without checking the configured STROBE behavior.
For the isolated output, a practical target sink current is around 20 mA ideally. A pull-up in the 470 ohm to 1 kOhm range is a good starting point for a 5 V rail, then it can be adjusted based on the exposure timing, cable/load capacitance, and required edge speed.

Best,
Oskar