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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