FEATURES AND BENEFITS The HiSpecGS connector features Molex’s patented Ground by Design™ contact system with two mating levels: longer power/ ground contacts and shorter high speed signal contacts. This innovative design offers low insertion force, a shorter signal electrical path, lower inductance and speeds over 400MHz. Molex’s HiSpecGS connector features a 0.76mm (.030”) pitch with 32 high speed signals and 34 power/ground contacts per linear inch, enabling its fast edge rate, low cross talk and high performance capabilities. The 330-circuit HiSpecGS connector is used in the Alpha Slot B 21264 processor for WTX platform work stations. Molex and Alpha Processor, Inc., the maker of the Alpha 21264 processor, worked together to develop this interconnect. The 108-circuit and 242-circuit HiSpecGS connectors will be used as the Memory Expansion Card Connector (MECC) for Rambus- based memory cards. The 108-circuit connector is for single channel Rambus applications; the 242-circuit connector is for dual channel Rambus applications. The Molex HiSpecGS connector series provides exceptional price performance value in a high-density package. HiSpecGS™ High Speed Edgecard Connector in Ground Signal Format for High Performance Applications HiSpecGS™ FEATURES AND SPECIFICATIONS Features and Benefits Electrical High Speed Edgecard Connector in Ground Signal Format for High Performance Applications ■ Ground by Design terminals for low insertion force and high Voltage: 30Vrms ■ ■ ■ ■ ■ speed electrical performance (~400MHz) Standard PCB tolerances can be used for less expensive board production Surface Mount Compatible Ground-signal-ground-signal format provides excellent signal integrity and impedance control 108 and 242 circuit connectors for 28Ω systems 330 circuit connectors for 50Ω systems Current: Per signal pin—0.5A Per power pin—1.75A Contact Resistance: 5mΩ max. Dielectric Withstanding Voltage: 400V AC Insulation Resistance: 1000 MΩ min. Loop Inductance: 108 and 242 Circuit — 2.5nH Capacitance: 108 and 242 Circuit — 2.6pF Mechanical Mating Force: 1.32kg (2.90 lbs.) max. per group of 30 pins Durability: 50 Cycles Reference Information Product Specification: PS-74191 UL File No.: 97129UL CSA File No.: LR 19980-483 Physical Housing: Glass-filled LCP, UL 94V-0 Contact: Copper Alloy Plating: Gold flash over Palladium Nickel, Nickel underplate Forklock: Phosphor Bronze ORDERING INFORMATION AND DIMENSIONS Circuits 108 108 242 242 330 Note: Contact Inside Sales for other circuit sizes Americas Headquarters Lisle, Illinois 60532 U.S.A. Tel:1-800-78MOLEX Fax:630-969-1352 Order No. 74191-0007 74191-0003 74191-0005 74191-0004 74191-0002 Far East North Headquarters Yamato, Kanagawa, Japan Tel:81-462-65-2324 Fax:81-462-65-2366 PC Tail Length 2.29 (.090) 2.92 (.115) 2.29 (.090) 2.92 (.115) 2.92 (.115) Far East South Headquarters Jurong, Singapore Tel:65-268-6868 Fax:65-265-6044 European Headquarters Munich, Germany Tel:49-89-413092-0 Fax:49-89-401527 PCB Hold Down 2 Forklocks 2 Forklocks 3 Forklocks 3 Forklocks 4 Forklocks Corporate Headquarters 2222 Wellington Ct. Lisle, IL 60532 U.S.A. Tel:630-969-4550 Fax:630-969-1352 V i si t o u r W e b si t e at h t t p:/ / www.mo l e x .co m Order No. USA-074 Printed in USA/5K/JI/JI/99.09 © 1999, Molex