The CH1782A Ultra Small Modem Module is a pin compatible and functional replacement for the CH1782. The CH1782A replaces the CH1782 due to the obsolescence of the modem chip set in the CH1782 by the manufacturer. The CH1782A is recommended as a replacement for the CH1782, but not for new designs. The CH1782A is a small, full function 2400bps modem component that is FCC Part 68 approved. It offers a fast and easy way to integrate a modem into an OEM product while utilizing a minimum amount of PCB space and having only an 0.50" height.