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Andy aka
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Why not connect the outputs to form a push-pull outputdriver (then there is no need for a load resistor). One opto input can be the inverse of the other and when you want to tri-state the output, disable the drive to both input LEDs.

enter image description here

You'll get a superior switching characteristic too because the rise time for the opto's output is typically 50ns whereas the fall time is typically 12ns.

Why not connect the outputs to form a push-pull output (then there is no need for a load resistor). One opto input can be the inverse of the other and when you want to tri-state the output, disable the drive to both input LEDs.

You'll get a superior switching characteristic too because the rise time for the opto's output is typically 50ns whereas the fall time is typically 12ns.

Why not connect the outputs to form a push-pull driver (then there is no need for a load resistor). One opto input can be the inverse of the other and when you want to tri-state the output, disable the drive to both input LEDs.

enter image description here

You'll get a superior switching characteristic too because the rise time for the opto's output is typically 50ns whereas the fall time is typically 12ns.

Source Link
Andy aka
  • 503.2k
  • 35
  • 401
  • 886

Why not connect the outputs to form a push-pull output (then there is no need for a load resistor). One opto input can be the inverse of the other and when you want to tri-state the output, disable the drive to both input LEDs.

You'll get a superior switching characteristic too because the rise time for the opto's output is typically 50ns whereas the fall time is typically 12ns.