NWK954 Datasheet, PDF (1/17 Pages) Mitel Networks Corporation – QUAD FAST ETHERNET REPEATER

Supersedes January 1998 version, DS4842 - 1.1
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
NWK954
QUAD FAST ETHERNET REPEATER
PRELIMINARY INFORMATION
DS4842-2.1 April 1998
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
BACKPLANE CONTROLS
BACKPLANE BUFFERS
OSCILLATOR
CLOCK DRIVERS
LOCAL EXPANSION BUS
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QUAD RJ45
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Fig. 1 System block diagram
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