In reversible design fan-out and feedback are not allowed [9, 10].
This reversible gate can be used as fan-out generator  and we use it in the proposed design.
Because fan-out is not considered reversible, in this design we have a fan-out generation circuit for generating the necessary inputs.
After generating fan-out signals, the required partial products are generated by means of Peres gates as reversible AND operation.
* Also less feasible is reducing holes in the plane caused by fan-out
Fine-pitch BGAs are making PCB designers think twice about implementing traditional fan-out patterns.
However, the main problem is the BGA's narrow pitch of 0.4 mm, and the problem that routing is not allowed on the top layer, except for fan-outs. The goal here is to fan-out the BGA without adversely affecting board fabrication.
It's not possible to have the traditional dog-bone fan-out pattern due to the extremely small space between the pads.
The fan-out method devised here avoids using a high-end technique and doesn't jeopardize signal integrity.
assemblies currently are available with 8-fiber cables.
, or preventing slivers of unconnected metal, are two examples that spring to mind, where some tools can come up with a different solution each time.
Accessories include dust caps, fan-outs
and break-out boxes to L connectors.