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ML4644 Datasheet(PDF) 1 Page - Micro Linear Corporation |
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ML4644 Datasheet(HTML) 1 Page - Micro Linear Corporation |
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1 / 11 page  GENERAL DESCRIPTION The ML4644 AUI Multiplexer contains all the necessary drivers/receivers and control logic to implement a 4 port MAU when used in conjuction with a transceiver chip which has a standard 802.3 AUI interface. Several ML4644s can be cascaded together to implement an 8 or 12 port MAU or standalone device. Logic within the ML4644 detects collisions resulting from multiple DTEs transmitting simultaneously. In addition, collision signals received from a transceiver attached at the MAU port are propagated to all of the DTE ports. Jabbering DTEs are prevented from loading down the network by an internal jabber timer which disables babbling ports. April 1997 ML4644* 4 Port AUI Multiplexer FEATURES s IEEE 802.3 compliant AUI interfaces assure compatibility with any AUI ready devices. s On-chip Jabber logic, Collision Detection, and SQE test with enable/disable option. s Selectable SQE Test s Selectable loopback s Ten network status LED outputs. * This Part Is End Of Life As Of August 1, 2000 BLOCK DIAGRAM LED DRIVERS MAU AUI INTERFACE TxIN1N TxIN1P RxOUT1N RxOUT1P CDOUT1N CDOUT1P MAU AUI INTERFACE TxIN2N TxIN2P RxOUT2N RxOUT2P CDOUT2N CDOUT2P MAU AUI INTERFACE TxIN3N TxIN3P RxOUT3N RxOUT3P CDOUT3N CDOUT3P TxIN4N TxIN4P RxOUT4N RxOUT4P CDOUT4N CDOUT4P MUX DTE AUI INTERFACE TxOUTP TxOUTN RxINP RxINN CDINP CDINN GND VCC VCC X2 X1 X3 OSCILLATOR 66 67 55 56 21 20 54 53 10 7 24 23 2 1 12 11 34 33 5 4 46 47 37 36 59 58 32 44 52 41 39 19 45 48 49 50 51 3 22 31 64 61 RRESET BIASING 17 25 26 15 14 29 30 63 60 MAU AUI INTERFACE SQEN4 SQEN3 SQEN2 SQEN1 1 |
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