|
Details, datasheet, quote on part number:NWK954D
| |
| Part: | NWK954D |
| Category: | Communication => Network => Ethernet/DS1/E1 (T1/E1) => Repeaters |
| Description: | Quad Fast Ethernet Repeater |
| Company: | Mitel Networks Corporation |
| Datasheet: | Download NWK954D datasheet File size : 181 kB |
| Request For quote: | Find where to buy NWK954D
|
| |
Datasheet text preview:
NWK954
QUAD FAST ETHERNET REPEATER
PRELIMINARY INFORMATION
Supersedes January 1998 version, DS4842 - 1.1 DS4842-2.1 April 1998
The NWK954 is a fully integrated, unmanaged, 4-port Fast Ethernet Repeater conforming to the IEEE 802.3 100BASE-TX Standard. The device integrates the 802.3 Repeater functions with four 100BASE-TX PHY modules, enabling direct connection to the isolation transformers with no additional PHY components. It has built-in LED drivers for display of port activity and network utilization. There is a local expansion port which allows up to six NWK954s to be cascaded to form a 24-port repeater with no additional components. With the addition of simple backplane driver/receivers, up to eight 24-port repeaters can be stacked. The NWK954 is supplied in a 128-pin PQFP and interfaces to the twisted pair media through 1:1 isolation transformers.
ORDERING INFORMATION
NWK954D/CG/GH1N
FEATURES s Compliant with IEEE 802.3 100BASE-TX Repeater Unit Specification s Incorporates four IEEE 802.3 Compliant 100BASE-TX Ports s Local Expansion Port for Cascading to 24 Ports s Stackable Backplane for Expansion up to 192 Ports s Link/Activity LED and Receive Error LED for each Port s Collision LED s Five LED Network Utilization Display s Base Line Wander Correction s Power Saving on Unused Ports s Driven from a Single 25MHz Clock s Single 5V supply s Low Power CMOS Technology s 128-pin PQFP package
OSCILLATOR
BACKPLANE CONTROLS
BACKPLANE BUFFERS
CLOCK DRIVERS
LOCAL EXPANSION BUS
NWK954
NWK954
NWK954
NWK954
NWK954
NWK954
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD RJ45
Fig. 1 System block diagram
NWK954
Hub 7
Hub 6
Hub 5
Hub 4
Hub 3
Hub 2
Hub 1
Hub 0
BACKPLANE CONTROLS
OSCILLATOR
BACKPLANE BUFFERS
CLOCK DRIVERS
LOCAL EXPANSION BUS
NWK954
NWK954
NWK954
NWK954
NWK954
NWK954
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD MAGNETICS
QUAD RJ45
Fig. 2 192-port stacked repeater
2
NWK954
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
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
128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97
IRD3 IRD2 DIG G ND2 DIG V DD2 P 0 _ RX LE D_ N P 0 _ E RLE D_ N P 1 _ RX LE D_ N P 1 _ E RLE D_ N P 2 _ RX LE D_ N P 2 _ E RLE D_ N P 3 _ RX LE D_ N P 3 _ E RLE D_ N ACTLE D_ N4 ACTLE D_ N3 ACTLE D_ N2 ACTLE D_ N1 ACTLE D_ N0 DIG G ND3 DIG V DD3 CO LLE D_ N BP DO E _ N BP DIE _ N BP CO LO E _ N BPACTOUT_N BP CO LIN_ N BPACTIN_N1 BPACTIN_N2 BPACTIN_N3 DIG G ND4 DIG V DD4 IRD1 IRD0
NWK954
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
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 P3RXVDD1 P3_RXIN P3_RXIP P3_TXVDD3 P3_TXGND3 P3_TXREF P3_TXGND2 P3_TXVDD2 P3_TXON P3_TXOP P3_TXGND1
P1_TXGND1 P1_TXOP P1_TXON P1_TXVDD2 P1_TXGND2 P1_TXREF P1_TXGND3 P1_TXVDD3 P1_RXIP P1_RXIN P1_RXVDD1 P1_RXGND1 P1_RXGND2 P1_RXVDD2 P1_RXVDD3 P1_RXGND3 P2_RXGND3 P2_RXVDD3 P2_RXVDD2 P2_RXGND2 P2_RXGND1 P2_RXVDD1 P2_RXIN P2_RXIP P2_TXVDD3 P2_TXGND3 P2_TXREF P2_TXGND2 P2_TXVDD2 P2_TXON P2_TXOP P2_TXGND1
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 51 62 63 64
GP128
Fig. 3 Pin connections top view
FUNCTIONAL DESCRIPTION Overvlew
T h e NWK954 is a mixed-signal CMOS device which integrates all of the functions required for an unmanaged 4port 100BASE TX repeater as defined in the IEEE 802.3 S ta ndard. 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.
3
|
|
