74191-0003

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 FEATURES AND SPECIFICATIONS Features and Benefits s s s s s HiSpecGS™ Electrical 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 s 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 High Speed Edgecard Connector in Ground Signal Format for High Performance Applications Reference Information Product Specification: PS-74191 UL File No.: 97129UL CSA File No.: LR 19980-483 Mechanical Mating Force: 1.32kg (2.90 lbs.) max. per group of 30 pins Durability: 50 Cycles 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 N ote: Contact Inside Sales for other circuit sizes Order No. 74191-0007 74191-0003 74191-0005 74191-0004 74191-0002 PC Tail Length 2.29 (.090) 2.92 (.115) 2.29 (.090) 2.92 (.115) 2.92 (.115) PCB Hold Down 2 Forklocks 2 Forklocks 3 Forklocks 3 Forklocks 4 Forklocks Americas Headquarters Lisle, Illinois 60532 U.S.A. Tel:1-800-78MOLEX Fax:630-969-1352 Far East North Headquarters Yamato, Kanagawa, Japan Tel:81-462-65-2324 Fax:81-462-65-2366 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 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