The H11AA1, H11AA2, H11AA3, H11AA4 devices consist of two gallium–arsenide infrared emitting diodes connected in inverse parallel, optically coupled to a monolithic silicon phototransistor detector.

• Built–In Protection for Reverse Polarity

• Guaranteed CTR Minimum Values as High as 100

• Guaranteed Minimum/Maximum Symmetry Limits

• To order devices that are tested and marked per

VDE 0884 requirements, the suffix ”V” must be

included at end of part number. VDE 0884 is a test option.

Applications

• Detecting or Monitoring ac Signals

• AC Line/Digital Logic Isolation

• Programmable Controllers

• Interfacing and coupling systems

of different potentials and impedances

• AC/DC — Input Modules