Direct Attach 4X and 12X High-Speed
Serial I/O Cable Assemblies


Meritec is now offering a new line of cable assemblies to support InfiniBand™ (IB) architecture specifications and other industry standard interfaces for high-speed data transfer applications to include 10G Fibre Channel, Serial ATA (SATA), and Serial Attached SCSI (SAS), 10G Ethernet-CX4, and PCI Express.

Meritec’s new offering is designed to support channel-based switched fabric I/O technology and industry standards for continuous flow serial or parallel link computing. The assembly provides for the continuous uninterrupted flow of serial or parallel data.

Direct Attach - Meritec’s new cable assembly technology is based on direct attach methodology where the signal wires in the cable are attached directly to the connector’s contacts eliminating the need for an interstitial printed circuit board. This avoids the undesirable effects the PCB can have on the signal integrity at higher data rates. 

Meritec’s Direct Attach 4X cable assembly meets IB™ standards by allowing for high-speed data rate transfers of >2.5Gbps per lane at lengths up to 8.0 meters with 24 AWG, not equalized and meets Ethernet-CX4 standards up to 17 meters. Direct attach methodology offers cross-talk performance of <1.0%* which has been difficult to achieve in 4X designs utilizing internal printed circuit boards for wire termination. Greater bandwidth and exceptional overall electrical performance are also favorable byproducts of the design.

Meritec’s Direct Attach 12X cable assembly meets IB™ standards by allowing for high-speed data rate transfers of >2.5Gbps per lane at lengths up to 8.0 meters with 24 AWG, not equalized and meets Ethernet-CX4 standards up to 17 meters. Direct attach methodology offers cross-talk performance of <1.0%* which has been difficult to achieve in 12X designs utilizing internal printed circuit boards for wire termination. Greater bandwidth and exceptional overall electrical performance are also favorable byproducts of the design. The use of three lengths of 4X cable provides greater flexibility than does one bundled 12X cable.

Passive Equalization - Meritec’s Direct Attach 4X and Direct Attach 12X are offered with passive equalization circuits built into the connectors back-shells to achieve higher data rate transfers (>2.5Gbps) and/or these longer IB cable assembly lengths:12.5 meters, 24 AWG; 9.5 meters, 26 AWG; 8.5 meters, 28 AWG. 

The connector interface utilized in the Direct Attach series of cable assemblies has been selected by the various standards organizations responsible for InfiniBand™, 10G Fibre Channel, SATA, Serial Attached SCSI (SAS), 10G Ethernet-CX4 and PCI Express.

* <1% nearest neighbor and <2% multiple aggressors 


Download 4X and 12X Line Drawings:


4X Straight
4X Straight Cable Assembly with Latch Actuator
4X Straight Cable Assembly with Thumbscrews

4X Angled
4X Angled Cable Assembly with Latch Actuator, Same "D" Ends
4X Angled Cable Assembly with Latch Actuator, Opposite "D" Ends
4X Angled Cable Assembly with Slotted Thumbscrews, Same "D" Ends
4X Angled Cable Assembly with Slotted Thumbscrews, Opposite "D" Ends

12X Straight
12X Straight Cable Assembly with Latch Actuator
12X Straight Cable Assembly with Thumbscrews

All 4X and 12X 
All 4X and 12X Cable Assemblies

Other 4X and 12X .pdf Downloads:
4X Bend Radius
12X Bend Radius
Direct Attach 4X and 12X
Test Report

News Release: 
<1% Cross Talk within 4X and 12X InfiniBand™ Cable Assemblies!


4X Straight 

 


4X Angled


12X Straight

Above shown with optional 
"Pull-to-Release" Latch Actuator 

 

 


4X Straight

 


4X Angled

 


12X Straight

Above shown with optional
Slotted Thumbscrews

 

FEATURES and BENEFITS:

  • 4X assemblies standard offering is with 24-26-28 AWG cable. Other cable offerings are available. 
  • 12X assemblies standard offering is with 24-26-28 AWG cable. Other cable offerings are available.
  • Direct Attach terminations provide optimized performance by removing unnecessary transitions in the signal path.
  • >2.5Gbps per channel-based lane.
  • Passive equalization circuits available built into the termination; per pair option.
  • Die-Cast back-shells for mechanical integrity and enhanced EMI shielding performance. 
  • Innovative "Pull-to-Release" latch mechanism that is friendly, reliable, and compact.
  • Thumbscrew version soon to be available.


Markets Served:

  • Communications 
    * 10G Ethernet-CX4....3.125G/Lane
    * 10G ATM, Sonet, STS, SDH....2.5G/lane 
  • Computer and Storage 
    * 10G Fibre Channel....3.187G/Lane
    * InfiniBand™....2.5, 5.0G/Lane
    * PCI Express....2.5, 5.0G/Lane
    * Serial ATA....3.0, 6.0G/Lane
    * Serial Attached SCSI....3.0, 6.0G/Lane
    * XAUI Applications....3.2, 6.4G/Lane
    * Serial or Parallel Rapid I/O....3.2, 6.4G/Lane
    * HyperTransport™....1.6, 3.2G/Lane
    * Proprietary I/O Interfaces, i.e. Rocket I/O....3.2G/Lane and Redwood I/O....3.2, 6.4G/Lane 

Applications
  • Chipset Design 
  • Computers 
  • Failover Jumpers
  • High-End Single User Links
  • Internet Equipment 
  • Routers 
  • Serial Aggregation Links
  • Serial Trunk Links
  • Servers 
  • Storage Equipment 
  • Switches
  • Switch Up Link
  • Systems Backbones 

SPECIFICATIONS:

Electrical:

Differential Impedance:

Near End Crosstalk:

Cable Assy Insertion Loss:

Connector Bandwidth:

Jitter:

Eye Pattern Opening:
- 100 10 W @ 100psec 

<2% @ 100psec (multiple aggressors) 

<5dB @ 1.25GHz (5 meters 26AWG) 

3dB @ 8GHz 

< 0.125 unit intervals (50psec) @2.5Gbps (5 meters 26AWG) 

350psec width min and 500 mV height min @ 2.5Gbps (5 meters 26AWG) 

Mechanical:

Insertion Force:

Withdrawal Force:

Retention Force:

Durability:

Min. Bend Radius:
30N (6.6 lbs.) max 

15N (3.3 lbs.) max 

75N (16.9 lbs.) min 

250 cycles 

2 inch @ 90 degree bend 

Environmental:

Temperature Range: 

Thermal Shock: 

Temperature Life: 
-10 to 60 C 

10 Cycles -55 to 85 C 

456 hours @ 90 C 

Materials:

Contact Mating Area:

Contact Bonding Area:

Connector Housing:

Backshell:

Strain Relief:

Latch Mechanism:

Cable:

Cu Alloy w/Au

Cu Alloy

High Temp Thermoplastic UL94V-0 

Zinc Die Cast

Thermoplastic Collar

Thermoplastic & Cu Alloy 

Fully Shielded 8 Differential Pairs, Twinax 


Approvals and Certifications:

UL and CSA approval pending  



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Last update July 12, 2005