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LAN8187 Datasheet(PDF) 8 Page - SMSC Corporation |
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LAN8187 Datasheet(HTML) 8 Page - SMSC Corporation |
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8 / 78 page  ±15kV ESD Protected MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX & flexPWR® Technology Datasheet Revision 1.7 (03-04-11) 8 SMSC LAN8187/LAN8187i DATASHEET Chapter 1 General Description The SMSC LAN8187/LAN8187i is a low-power, industrial temperature (LAN8187i), variable I/O voltage, analog interface IC with HP Auto-MDIX for high-performance embedded Ethernet applications. The LAN8187/LAN8187i can be configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.8V linear regulator. An option is available to disable the linear regulator to optimize system designs that have a 1.8V power plane available. 1.1 Architectural Overview The LAN8187/LAN8187i consists of an encoder/decoder, scrambler/descrambler, wave-shaping transmitter, output driver, twisted-pair receiver with adaptive equalizer and baseline wander (BLW) correction, and clock and data recovery functions. The LAN8187/LAN8187i can be configured to support either the Media Independent Interface (MII) or the Reduced Media Independent Interface (RMII). The LAN8187/LAN8187i is compliant with IEEE 802.3-2005 standards (MII Pins tolerant to 3.6V) and supports both IEEE 802.3-2005 -compliant and vendor-specific register functions. It contains a full- duplex 10-BASE-T/100BASE-TX transceiver and supports 10-Mbps (10BASE-T) operation on Category 3 and Category 5 unshielded twisted-pair cable, and 100-Mbps (100BASE-TX) operation on Category 5 unshielded twisted-pair cable. Figure 1.1 LAN8187/LAN8187i System Block Diagram Hubs and switches with multiple integrated MACs and external PHYs can have a large pin count due to the high number of pins needed for each MII interface. An increasing pin count causes increasing cost. The RMII interface is intended for use on Switch based ASICs or other embedded solutions requiring minimal pincount for ethernet connectivity. RMII requires only 6 pins for each MAC to PHY interface plus one common reference clock. The MII requires 16 pins for each MAC to PHY interface. The SMSC LAN8187/LAN8187i is capable of running in RMII mode. Please contact your SMSC sales representative for the latest RMII specification. The LAN8187/LAN8187i referenced throughout this document applies to both the commercial temperature and industrial temperature components. The LAN8187i refers to only the industrial temperature component. 10/100 Media Access Controller (MAC) or SOC SMSC LAN8187/ LAN8187i Magnetics Ethernet System Bus LEDS/GPIO 25 MHz (MII) or 50MHz (RMIII) Crystal or External Clock MII /RMII |
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Similar Description - LAN8187 |
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