The pinout map of a ball grid array component, detailing which signal, power, or ground net is assigned to each physical coordinate on the package underside. A well-designed ballout places high-speed signals near the edges or groups them logically to make escaping the traces easier for the PCB designer.
Heard on the job
The manufacturer updated the ballout in the new datasheet, so we've to rip up and reroute the entire memory interface.
Related terms
Ball grid array
A surface-mount package type that uses a grid of solder balls beneath the component for electrical connections.
Fanout
Short connections that bring each pin of a dense part out to a via so it can be routed on other layers.
Breakout
Drilled hole wandering past the edge of its pad, or the routing that escapes signals from a dense part.