Keeloq RF Encoder Chip with Manchester Modulation in DIP-8 Package - 

RF600E is a encoder I/Cs with 8pin PDIP package. They have been designed to achieve the maximum possible range from any radio/infrared transmitter receiver set. The RF600E is a simple device to use. It requires only the addition of input switches and RF circuitry for use as the transmitter in the end application. Transmission is automatic without user intervention. Optimum range of data transmission is dependent on many factors including RF Power output, receiver sensitivity, antenna efficiency, local environmental conditions and any local Interference data type which is being transmitted. The RF600E chipset use a fully balanced Manchester encoded data protocol designed for optimum use of the radio transmission path.