The PS8501L3-E3-AX: The Renesas NEPOC PS8501L3--AX is a single-channel DC-input optocoupler with a phototransistor output that includes a base connection. The base pin allows the designer to tailor the switching threshold or add a resistor to improve turn-off time beyond the typical 350ns — a useful degree of freedom not available on Darlington or simple phototransistor optos.
Typical turn-on of 220ns and turn-off of 350ns place this part in the fast-switching class for a phototransistor optocoupler. If you are replacing a slower opto in an existing design, check that the minimum CTR of 15% at 16mA forward current still meets your logic-level threshold at the output load — the CTR is specified at 16mA If, so plan the LED drive resistor accordingly. The output transistor is rated for 35V Vce and 8mA continuous output current.
Housed in an 8-SMD Gull Wing package, the PS8501L3--AX is a surface-mount part. ROHS3 compliant per the listing, so no exemption issues for EU or similar regulated markets.
Renesas lists this part as Active.
