DM9301

  The DM9301 is a physical-layer, single-chip, low-power media converter for 100BASE-TX/FX full duplex repeater applications. On the TX media side, DM9301 provides a direct interface to Unshielded Twisted Pair Cable 5 (UTP5) for 100BASE-TX Fast Ethernet.On the FX media side, it provides a direct interface to a Pseudo Emitter Coupled Logic level interface(PECL).

  The DM9301 uses a low power and high performance CMOS process. It contains the entire physical layer functions of 100BASE-TX as defined by IEEE802.3u, including the Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA), Twisted Pair Physical Medium Dependent Sublayer (TP-PMD) and a PECL compliant interface for a fiber optic module, compliant with ANSI X3.166.The DM9301 provides two independent clock recovery circuits to minimize bit delay through the converter (no FIFO are used to buffer data between the FX and TX interfaces).  Furthermore, due to the excellent rise/fall time control by a built-in wave-shaping filter, the DM9301 needs no external filter to transport signals to the media on the 100Base-TX interface.