nwk954 Mitel, nwk954 Datasheet
nwk954
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nwk954 Summary of contents
Page 1
... 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 eight 24-port repeaters can be stacked ...
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... Hub 6 Hub 5 Hub 4 Hub 3 Hub 2 Hub 1 Hub 0 BACKPLANE CONTROLS LOCAL EXPANSION BUS NWK954 NWK954 QUAD QUAD MAGNETICS MAGNETICS QUAD RJ45 2 BACKPLANE BUFFERS NWK954 NWK954 QUAD QUAD MAGNETICS MAGNETICS Fig. 2 192-port stacked repeater OSCILLATOR CLOCK DRIVERS NWK954 NWK954 QUAD QUAD MAGNETICS MAGNETICS ...
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... 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 NWK954s to build a 24-port repeater with no additional components and also allows stacking eight 24-port repeaters with the addition of simple backplane driver/receiver components ...
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... LINE MONITOR 4 TRANSCEIVER TRANSCEIVER REPEATER CONTROLLER TRANSCEIVER TRANSCEIVER POWER-ON RESET 125MHz SYNTHESIZER SIPO AND CLOCK DECODER RECOVERY Port [3:0] transceiver details Fig. 4 NWK954 block diagram P0_TXOP P0_TXON P0_TXREF PORT 0 P0_RXIP P0_RXIN P1_TXOP P1_TXON P1_TXREF PORT 1 P1_RXIP P1_RXIN P2_TXOP P2_TXON P2_TXREF PORT 2 P2_RXIP ...
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... When a collision occurs between 2 twisted pair ports on an NWK954, the event is communicated to other cascaded NWK954s by asserting the collision signal (BPCOL_N). This instructs all cascaded NWK954s to transmit the jam signal for the duration of the collision event. BPCOL_N is also asserted when a collision occurs between 2 twisted pair ports on different NWK954s. ...
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... NWK954 BACKPLANE 5 DATA BACKPLANE CLOCK 7 BACKPLANE ACTIVITY BACKPLANE COLLISION 6 7 BPACTIN_ N [7:1] 5 LACTIN_N [5:1] LACTOUT_N BPCOLIN_N BPCOL_N BPCLK 5 IRD [4:0] 7 BPACTIN_ N [7:1] 5 LACTIN_N [5:1] LACTOUT_N BPCOLIN_N BPCOL_N BPCLK 5 IRD [4:0] 7 BPACTIN_ N [7:1] 5 LACTIN_N [5:1] LACTOUT_N BPCOLIN_N BPCOL_N BPCLK 5 IRD [4:0] 7 BPACTIN_ N [7:1] 5 LACTIN_N [5:1] LACTOUT_N BPCOLIN_N BPCOL_N BPCLK ...
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... The bidirectional buffer is controlled by 2 control signals (BPDOE_N and BPDIE_N) which can be taken from any one of the NWK954 devices in the hub. BPDOE_N and BPDIE_N default to being active low but can be independently changed to active high by the addition of an external pull-down resistor, as shown in Fig ...
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... TP-PMD Standard. The four Scramblers in the NWK954 are seeded with different values based on the TA[4:2] input. When multiple NWK954s are cascaded to make a hub, each NWK954 should have a unique value on TA[4:2] to ensure that all of the Scramblers in the hub are seeded with different values. ...
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... Standard digital Backplane activity output. Indicates receive activity on output any of the NWK954s on the local expansion bus. Drives the backplane through an external driver. Only one of the local NWK954s is required to drive this signal, the others should be left unconnected. Output changes asynchronously. Table 5 NWK954 Description Description Continues… ...
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... IRD[4:0] and BPCLK signals input with pull-up onto the backplane. Output changes on the rising edge of TXCLKIN. Only one of the local NWK954s is required to drive this signal, the others should be left unconnected. Polarity defaults to active low but may be switched to active high by adding an external 10k pull-down ...
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... Digital inputs, Scrambler seed. Each ot the four PHY modules in the no pull-ups NWK954 is provided with a unique scrambler seed derived from TA[4:2]. To ensure that all ot the local PHYs have unique scrambler seeds, each NWK954 connected to the local expansion bus should have its TA[4:2] input set to a unique value by connecting to DIGVDD or DIGGND ...
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... NWK954 Power Signal Pin no. DIGGND[5: 1] 94, 100, 111, 126, 4 DIGVDD[5: 1] 93, 99, 110, 125, 3 DIGGND6 85 DIGVDD6 84 SUBVDD[2:1] 81, 16 VREFGND 83 VREFVDD 82 P0_TXGND[3:1] 26, 28, 32 P0_TXVDD[3:2] 25, 29 P0_RXGND[3:1] 17, 20, 21 P0_RXVDD[3:1] 18, 19,22 P1_TXGND[3:1] 39, 37, 33 P1_TXVDD[3:2] 40, 36 P1_RXGND[3:1] 48, 45, 44 P1_RXVDD[3:1] 47, 46,43 P2_TXGND[3:1] 58, 60, 64 P2_TXVDD[3:2] 57, 61 P2_RXGND[3:1] 49, 52, 53 P2_RXVDD[3:1] 50, 51, 54 ...
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... 0· TBD ns F – NWK954 Conditions Conditions Including package Including package I = — 6mA 6mA OL 0·4V to 2·4V into 20pF load 2·4V to 0·4V into 20pF load Including package = — 24mA I OH ...
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... NWK954 AC ELECTRICAL CHARACTERISTICS Recommended Operating Conditions apply except where otherwise stated TXCLK and RESET_N Characteristic TXCLKIN Frequency Duty cycle RESET_N Pulse width TXOP/TXON The differential output voltage shall be in the range 950mV to 1050mV. The differential overshoot shall not exceed 5%. Overshoot transients must decay to within 1% of the steady state voltage within 8ns of the start of the differential signal transition ...
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... P1_TXON R3 34 P1_TXOP P0_TXOP R3 30 P0_TXON P0_RXIP P0_RXIN R2 R1 Fig. 8 External components NWK954 RXON3 RXOP3 RXOC3 TXIP3 TXIN3 TXIC3 TXIC2 TXIN2 TXIP2 1:1 RXOC2 MAGNETICS RXOP2 RXON2 VALOR ST6184 RXON1 RXOP1 BEL 5558-5999-74 RXOC1 TXIP1 TXIN1 TXIC1 TXIC0 ...
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... Mitel. This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specifi ...