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NWK954D Datasheet(PDF) 3 Page - Mitel Networks Corporation |
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NWK954D Datasheet(HTML) 3 Page - Mitel Networks Corporation |
3 / 17 page NWK954 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 IRD4 LACTOUT_N DIGVDD1 DIGGND1 RESET_N LACTIN_N1 LACTIN_N2 LACTIN_N3 LACTIN_N4 LACTIN_N5 TDC TDIO TA4 TA3 TA2 SUBVDD1 P0_RXGND3 P0_RXVDD3 P0_RXVDD2 P0_RXGND2 P0_RXGND1 P0_RXVDD1 P0_RXIN P0_RXIP P0_TXVDD3 P0_TXGND3 P0_TXREF P0_TXGND2 P0_TXVDD2 P0_TXON P0_TXOP P0_GND1 BPCLK BPCOL_N DIGGND5 DIGVDD5 BPACTIN_N4 BPACTIN_N5 BPACTIN_N6 BPACTIN_N7 PSEN0 PSEN1 TXCLKIN DIGGND6 DIGVDD6 VREFGND VREFVDD SUBVDD2 P3_RXGND3 P3_RXVDD3 P3_RXVDD2 P3_RXGND2 P3_RXGND1 P3–RXVDD1 P3_RXIN P3_RXIP P3_TXVDD3 P3_TXGND3 P3_TXREF P3_TXGND2 P3_TXVDD2 P3_TXON P3_TXOP P3_TXGND1 NWK954 Fig. 3 Pin connections – top view FUNCTIONAL DESCRIPTION Overvlew The NWK954 is a mixed-signal CMOS device which integrates all of the functions required for an unmanaged 4- port 100BASE TX repeater as defined in the IEEE 802.3 Standard. The device incorporates all of the necessary 100BASE-TX PHY functions to allow direct interfacing to a quad 1:1 magnetics module with a modest number of external passive components. The built-in expansion port allows cascading of up to 6 NWK954s to build a 24-port repeater with no additional components and also allows stacking of up to eight 24-port repeaters with the addition of simple backplane driver/receiver components. The operating status of the device is indicated on 14 outputs designed to directly drive LEDs. This high level of integration combined with low power consumption and low pin count offers an efficient and low cost solution for Fast Ethernet unmanaged repeater design. Compliance with Standards The NWK954 is designed for compliance with the IEEE 802.3 Standard, Clause 24 (100BASE-X PCS and PMA), Clause 25 (100BASE-TX PMD) and Clause 27 (Repeater for 100Mb/s Baseband Networks). Clause 25 references the FDDI twisted pair PMD Standard, henceforth referred to as TP-PMD. Compatibility With Other Devices The NWK954 is designed to connect directly to 5 other NWK954 devices using the expansion bus. The Expansion Port is identical to that used on the NWK950 Repeater Controller. The Expansion Port may be connected to a backplane through external driver/receivers. The backplane specification is identical to that used by the NWK950, so repeaters using the NWK950 may be stacked with repeaters using the NWK954. GP128 |
Similar Part No. - NWK954D |
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Similar Description - NWK954D |
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