GENERAL DESCRIPTION
The 100Base-Tx Physical Data Transceiver (PDTR) includes the Physical Data Transmitter (PDT) and the Physical Data Receiver (PDR). The PDT converts encoded symbols into a serial NRZI data stream. The on-chip PLL generates a bit rate clock from the TCLKIN or crystal reference. The PDR uses a built-in clock recovery PLL to extract clock information from the received data stream. The recovered clock is used for serial-to-parallel data conversion.

FEATURES
• Full-Duplex Operation
• Generates 125-Mhz Transmit Clock and 25-Mhz SYMCLK
• Converts 5-Bit Parallel Transmit Data to 1-Bit Serial Data
• Converts Transmit NRZ Data to NRZI Data
• Loopback and Transmitter-Off Modes
• Recovers 125-MHz Clock from Incoming serial NRZI Data Stream
• Reclocks Incoming Serial NRZI Data Stream Using Recovered Clock
• Converts Received Serial Bit Stream to 5-Bit Paralled Form
• Converts NRZI data to NRZ
• Generates 25-MHz Receive Clock
• Package type
    -52 PLCC
    -52 PQFP