Products in this family are used to package or encipher information into a format suitable for transmission or storage, and/or to perform the inverse operation at the other end of a communications path, typically through the use of some form of modulation process. Examples include devices that generate an analog video signal from digital data (or vice-versa), devices that encode the status of buttons for transmission to implement remote control functions, and devices that facilitate connection of a standard UART to a standard infrared transceiver.