1.85 by 1.85mm
(.073 by .073") Pitch
GbX® Module-to-Backplane
Connector System
The GbX Backplane Interconnect System Delivers Speeds Beyond 6.0Gbps and
High Density With Up To 69 Mated Differential Channels Per Inch
The GbX connector system provides the speed, density, and low applied cost required by leading-edge
backplane applications. It is especially suited for designs that require future speed upgrades by
daughtercard replacement into an existing backplane. With a native differential signaling speed of
6.0Gbps, the system is well suited for existing and future generations of XAUI (10 Gigabit Attachment Unit
Interface) and InfiniBand* based systems, in addition to those based on ATCA** (Advanced Telecom
Computing Architecture) and OIF (Optical Internetworking Forum) chip protocols.
In 4- and 5-Pair Columns
75220, 75360 Daughtercard
Assemblies
Internetworking and telecommunication equipment engineers will benefit by the GbX connector’s ability to
provide not only a high-density, low applied-cost solution in the near term, but also by its electrical
performance in upgradeable systems. Speeds of 10.0Gbps and beyond have been demonstrated with
appropriate SERDES (Serializer / Deserializer) devices and board-material selection. This allows system
architects freedom-of-design for faster future systems without the worry of backwards compatibility, along
with the economy of a common backplane for two generations of equipment.
75235, 75237 Backplane
Signal Headers
75341, 75510 Backplane
Power
In addition, the GbX L-Series system provides a complimentary high-density open pin field for cost-
effective design of slower speed circuits along the same stiffener as the standard, high-speed GbX wafers.
Features and Benefits
■ Up to 69 real differential pairs per linear inch
(27 real differential pairs per 10mm) provide
higher density than VHDM-HSD®
■ Bifurcated contact beams in daughtercard
receptacle allow greater reliability with two
points of contact to header pin
■ Optimized differential pair contacts allow
easier board trace routing
■ Data rate options up to 10.0Gbps to support
future daughtercard speed upgrades
■ Modular daughtercard components with GbX
L-Series available as custom, cost-effective
receptacle assemblies
SPECIFICATIONS
Reference Information
Packaging:
Electrical
Physical
Signal/Shield Contact Current Rating: 1.0A
Housing: Liquid Crystal Polymer, UL 94V-0
Daughtercard Assemblies – Tube
Headers -- Tray
UL File No.: Pending
CSA File No.: Pending
Designed In: mm
Contact to Plated-Through-Hole Resistance: 1.0 milliohm Contact: Copper Alloy
max.
Plating:
Power Blade Contact Resistance: 3.0 milliohms max.
Dielectric Withstanding Voltage: 750V RMS
Insulation Resistance: 10,000 Megohms min.
Contact Area – 0.76um (30µ”) Gold (Au) min.
Solder Tail Area – Tin (Sn)
Underplating – Nickel (Ni)
PCB Thickness: 1.60mm (.062”) typical
Operating Temperature: -55 to 105 degrees C
Mechanical
Contact Insertion Force: 44.48N (10.00 lb) typical per
contact
Contact Retention Force: 8.90N (2.00 lb) min. per
contact
Mating Force: 0.59N (0.13 lb) max. per contact
Unmating Force: 0.29N (0.07 lb) min. per contact
Durability: 250 cycles max.
Notes:
GbX and VHDM-HSD are registered trademarks of Teradyne, Inc.
*InfiniBand is a registered trademark of the InfiniBand Trade Association
**ATCA is a trademark of the PCI Industrial Manufacturers Group