Mitel NWK954 - Manual
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Table of Contents:
- Page 3 – Fig. 3 Pin connections – top view; FUNCTIONAL DESCRIPTION; The NWK954 is a mixed-signal CMOS device which; Compliance with Standards; The NWK954 is designed for compliance with the IEEE 802.3; Compatibility With Other Devices; The NWK954 is designed to connect directly to 5 other
- Page 4 – Fig. 4 NWK954 block diagram
- Page 5 – CLOCK
- Page 6 – Fig. 6 External backplane drivers/receivers
- Page 7 – LED Drivers; Port status
- Page 8 – Function
- Page 10 – Signal; BPCLK; Type
- Page 11 – Table 6; Clocks and Controls; TXCLKIN
- Page 14 – AC ELECTRICAL CHARACTERISTICS
- Page 15 – Fig. 8 External components; MAGNETICS
- Page 16 – PACKAGE DETAILS
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.
QUAD RJ45
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MAGNETICS
NWK954
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MAGNETICS
NWK954
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MAGNETICS
NWK954
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MAGNETICS
NWK954
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MAGNETICS
NWK954
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MAGNETICS
NWK954
CLOCK DRIVERS
OSCILLATOR
BACKPLANE BUFFERS
BACKPLANE CONTROLS
LOCAL EXPANSION BUS
Fig. 1 System block diagram
FEATURES
■
Compliant with IEEE 802.3 100BASE-TX Repeater
Unit Specification
■
Incorporates four IEEE 802.3 Compliant 100BASE-TX
Ports
■
Local Expansion Port for Cascading to 24 Ports
■
Stackable Backplane for Expansion up to 192 Ports
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Link/Activity LED and Receive Error LED for each Port
■
Collision LED
■
Five LED Network Utilization Display
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Base Line Wander Correction
■
Power Saving on Unused Ports
■
Driven from a Single 25MHz Clock
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Single 5V supply
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Low Power CMOS Technology
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128-pin PQFP package
ORDERING INFORMATION
NWK954D/CG/GH1N
NWK954
QUAD FAST ETHERNET REPEATER
PRELIMINARY INFORMATION
Supersedes January 1998 version, DS4842 - 1.1
DS4842-2.1 April 1998
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Summary
NWK954 3 1234567891011121314151617181920212223242526272829303132 9695949392919089888786858483828180797877767574737271706968676665 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 IRD3 IRD2 DIGGND2 DIGVDD2 P0_RXLED_N P0_ERLED_N P1_RXLED_N P1_ERLED_N P2_R...
NWK954 4 PORT 0 TRANSCEIVER P0_TXOP P0_TXON P0_TXREF P0_RXIP P0_RXIN PORT 1 TRANSCEIVER P1_TXOP P1_TXON P1_TXREF P1_RXIP P1_RXIN PORT 2 TRANSCEIVER P2_TXOP P2_TXON P2_TXREF P2_RXIP P2_RXIN PORT 3 TRANSCEIVER P3_TXOP P3_TXON P3_TXREF P3_RXIP P3_RXIN RESET_N PSEN [1:0] TXCLKIN T A [4:2] VOLTAGE REFERE...
NWK954 5 Basic Repeater Function The Repeater Controller monitors activity on the 4 twisted pair ports and on the Expansion Port. When a packet is receivedon one of the twisted pair ports it is forwarded to the other 3twisted pair ports and to the Expansion Port. When a packet isreceived on the Expa...
