Pinout

Not to be confused with PinOut.
A pinout diagram of a very common 555 timer integrated circuit showing its eight pins (numbered 1-8) and their corresponding functions ("ground", "trigger", "output", etc.)

In electronics, a pinout (sometimes written "pin-out") is a cross-reference between the contacts, or pins, of an electrical connector or electronic component, and their functions. "Pinout" now supersedes the term "basing diagram" which was the standard terminology used by the manufacturers of vacuum tubes and the RMA. The RMA started its standardization in 1934, collecting and correlating tube data for registration at what was to become the EIA. The EIA (Electronic Industries Alliance) now has many sectors reporting to it and sets what is known as EIA standards where all registered pinouts and registered jacks can be found.