NEC PS2705-1 AC Input Transistor Output Optocoupler Isolator

Inside the optocoupler, there is two LEDs connected in inverse parallel (back-to-back). This configuration allows it to respond to both the positive and negative halves of an AC waveform. For DC triggering, it will respond to a sufficiently levelled DC regardless of the polarity,

FEATURES:
- AC Input Response
- High current transfer ratio (CTR = 100 % TYP.
- High isolation voltage (BV = 3 750 Vr.m.s.)
-Small and thin (SOP-4) package
- High-speed switching (tr, tf = 5 µs TYP.)
- UL Approved