Keeloq RF Decoder Chip with Asynchronous Serial Interface in DIP-18 Package - 

RF600D is a decoder IC with 18pin PDIP package. It has been designed to achieve the maximum possible range from any radio/infrared transmitter receiver set. This decoder is very easy to use and can be inserted directly into a circuit. In the stand alone operation, The RF600D has the capability to learn up to 7 unique RF600E transmitters and with the addition of an EEPROM memory device this is increased to 48 RF600E encoders. The RF600D may operate with an external 96C76 EEPROM device as additional memory to store identity information of transmitter/encoders. Data stored within the EEPROM is encrypted to maintain security. The RF600D is connected directly to the data output of a radio receiver module and upon detection of a valid data packet ,It will decode the Keeloq encrypted data stream. When an address match occurs the RF600D asserts its 4 digital outputs. An additional output which shows the status of the encoder battery is also asserted.