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DM9301F Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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DM9301F Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 22 page  DM9301 100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter Final 1 Version: DM9301-DS-F02 May 8, 2000 General Description 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, it 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. Patent-Pending Circuits • Smart adaptive receiver equalizer • Digital algorithm for high frequency clock/data recovery circuit • High speed wave-shaping circuit Block Diagram TX Code- group Alignment Monitor Descrambler Serial to Parallel NRZI to NRZ RX CRM MLT-3 to NRZI Adaptive EQ CGM 125M TPRXCLK 25M TPRXCLK 25M OSC/XTAL TPRXI+/- Parallel to Serial FX Code- group Alignment Monitor Serial to Parallel RX CRM Scrambler Parallel to Serial NRZ to NRZI NRZI to MLT-3 MLT-3 Driver TPTXO+/- Rise/Fall Time CTL 25M FXRXCLK 125M FXRXCLK PECL TXMT PECL RCVR PECLRXI +/- PECLTXO +/- FXSD RCVR Link Status Monitor & LED Driver PECLSD NRZ to NRZI NRZI to NRZ |
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