Description
The HD-6409/883 Manchester Encoder-Decoder (MED) is a high speed, low power device manufactured using self aligned silicon gate technology. The device is intended for use in serial data communication, and can be operated in either of two modes. In the converter mode, the MED con verts Nonreturn-to-Zero code (NRZ) into Manchester code and decodes Manchester code into Nonreturn-to-Zero code. For serial data communication, Manchester code does not have some of the deficiencies inherent in Nonreturn-to-Zero code. For instance, use of the MED on a serial line eliminates DC components, provides clock recovery, and gives a relatively high degree of noise immunity. Because the MED converts the most commonly used code (NRZ) to Manches ter code, the advantages of using Manchester code are eas ily realized in a serial data link.

FEATUREs
• This Circuit is Processed in Accordance to MIL-STD-883 and is Fully Conformant Under the Provisions of Paragraph 1.2.1.
• Converter or Repeater Mode
• Independent Manchester Encoder and Decoder Operation
• Static to One Megabit/Sec Data Rate Guaranteed
• Low Bit Error Rate
• Digital PLL Clock Recovery
• On Chip Oscillator
• Low Operating Power: 50mW Typical at +5V
• Available in 20 Lead Dual-In-Line and 20 Pad LCC Package