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PHY is a generic electronics term refering to a special electronic integrated circuit or functional block of a circuit that provides physical access to a digital connection cable. Two digital voltmeters The field of electronics is the study and use of systems that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. ... Jump to: navigation, search Optical Microscope image of an integrated circuit showing defects in the aluminium layer deposition. ...


PHY is also a common abbreviation for physical layer of OSI model. The physical layer is level one in the seven level OSI model of computer networking. ... Jump to: navigation, search The Open Systems Interconnection Reference Model (OSI Model or OSI Reference Model for short) is a layered abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnect initiative. ...


Example uses

  • A PHY chip (called PHYceiver) is commonly found on Ethernet devices. Its purpose is the physical access of the link. Usually used together with an MII-chip.
  • A PHY part is integrated in most Universal Serial Bus (USB) controllers in hosts or embedded systems and provide the electrical part of the interface.
  • The Infrared Data Associations IrDA specification includes a IrPHY specification for the physical layer of the data transport.

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