Active production — design-in ready
The PS2514-1Y-A: This NEPOC-series optoisolator delivers 5000Vrms isolation between input and output, enough to meet reinforced insulation requirements in 230VAC mains-referenced circuits.
CTR window and drive margin
Current transfer ratio is guaranteed between 50% and 200% at If=5mA — the wide min-to-max spread means the downstream logic must tolerate a 4:1 variation in output current. A 10kΩ pullup to 5V at 50% CTR yields about 0.25mA collector current, which is 5mV across the pullup — marginal for a TTL input unless the pullup is lowered to 1kΩ. The 350mV max Vce saturation at 20mA output keeps the voltage drop low enough that the output can drive a 5V CMOS input without a level shifter, provided the pullup resistor is sized for the minimum CTR corner.
Speed and switching limits
Typical rise and fall times are 15µs each, which sets a practical switching ceiling around 33kHz — above that the output waveform becomes too distorted for reliable edge detection. This is a DC-coupled or low-frequency isolation part, not a high-speed digital isolator.
The 4-DIP footprint is shared across dozens of optoisolator families, so a layout change to a pin-compatible part requires no board spin.
Output voltage and current capability
The output transistor is rated for 40V maximum and 20mA continuous per channel — sufficient for 24V industrial logic buses and low-power relay drivers. The 30mA max forward current on the LED side means the input resistor for 5V logic should be at least 130Ω to stay within the absolute maximum.