The MOC256 is an AC input phototransistor optocoupler. The device consists of two infrared emitters connected in anti–parallel and coupled to a silicon NPN phototransistor detector. They are designed for applications requiring the detection or monitoring of AC signals. These devices are constructed with a standard SOIC–8 footprint.
   
• Guaranteed Current Transfer Ratio CTR of 20% at IF=10 mA
• UL Recognized. File Number E54915
• Industry Standard SOIC–8 Surface Mountable Package
• Standard Lead Spacing of 0.050 inches
• Available in Tape and Reel Option (Conforms to EIA Standard RS481A)
• Bidirectional AC Input (Protection Against Reversed DC Bias)
• Guaranteed CTR Symmetry of 2:1 Maximum
• High Input–Output Isolation of 3000 Vac (rms) Guaranteed