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