NWK954CG

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 EXPANSIO...