3M Electronic Solutions Division 3M™Twin Axial Cable - … · Coating Ce Ceramics Ep Electronic...

3M Electronic Solutions Division

© 3M 2011. All Rights Reserved.

3M™Twin Axial Cable

May 10, 2011

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3M Company Overview• 2010 Sales: $26.6 billion• Net income: $4.1 billion• 65% of sales outside the United States

• Headquartered in St. Paul, MN • Over 80,000 employees • 55,000+ products• Operations in more than 60 countries• 589 U.S. patents issued in 2010


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3M’s Technologies Extend Into Multiple Markets

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Enterprise & Netcom Market Trends

• Performance demands in tightly packed enclosures continue to increase

Performance Requirements Density Constraints Cost Controls

• Explosive growth in technologies has created an endless drive for increased bandwidth

• Suppliers are stressed to provide reliable, space-efficient & cost efficient solutions to meet emerging opportunities

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3M Innovation

• 3M has a legacy of innovation - invented ribbon cable/IDC technology 50 years ago

• 3M is an industry leader in films, adhesives, bonding and fine pitch processing

• 3M has brought these technologies together to develop the 3M™ Twin Axial Cable, SL8800 Series

• This is only our first generation of high-speed ribbon twin axial cable


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Twin Axial Cable Landscape

Multiple layer wrap overlongitudinal shield wrapCable must still be bundled

Emergent Longitudinal CablePremium Performance

EXISTING & EMERGING SOLUTIONSTraditional Wrap CableStandard Performance

Multiple layer wrapCable must still be bundled

3M™ Twin Axial Cable, SL8800 Series

Premium Performance

3M SOLUTION

Simultaneous 4-pair constructionFewer layers, thinner constructionCable in final form, no bundling requiredLongitudinal shield no resonance


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Current Offerings

• 3M™ Twin Axial Cable, SL8800 Series (sold in reels)

• 3M™ High Routability Internal Mini Serial Attached SCSI (miniSAS) Assemblies, 8F36 Series


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Current Offerings

• 100 ohm differential impedance• 30 AWG 4-pair ribbon• Ag or Sn plated signal wires• With or without sideband wires


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A Unique Combination of Benefits

• Electrical Performance– Resonance-free to 20 GHz– Excellent EMI performance

• Assembly process benefits– Simultaneous foil-stripping of 4-pair– Consistent wire position

• Thin, foldable– Tight radius folds while maintaining signaling integrity


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Thin and Foldable

Conventional Twin Axial Cable vs. 3M Twin Axial Cable

Two strands of 3M SL8800 Series next to over-braid bundle

Each version is 30 AWG, 8 pairs

Ribbons less than 0.9 mm thick each

– Two layers of 3M SL8800 Series cable are less than ¼ the thickness of a typical over-braided cable

– 3M SL8800 Series cable can be folded with minimal performance impact, opening up new routing options


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More Sample and Test Images

180 degree crease3 creases

• Samples had previously been subjected to 85ºC/1000 hrs heat aging • Creases done with fingers, without any mandrel to limit inside radius of fold• S-parameters & TDR measured before and after folding


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© 3M 2011. All Rights Reserved. CONFIDENTIAL

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Frequency (MHz)

SDD

21 (d

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A23 InitialA1314 InitialA56 InitialA1617 InitialSDD21 limit line

Differential Insertion Loss (SDD21) before and after Folding

Data from 3M test request IR8253

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SDD

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A23 InitialA1314 InitialA56 InitialA1617 InitialA23 180 deg Creased X3A1314 180 deg Creased X3A56 180 deg Creased X3A1617 180 deg Creased X3SDD21 limit line


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Differential Insertion Loss (SDD21) from repeated folds in same location

• 180 degree bend about a 1 mm radius pin gauge• 10 bend sample was folded and unfolded 10 times (same bend location)• SDD21 shown, but we examined all 5 SAS2.1 S-parameter requirements, and there was similar minimal impact on each

Data from 3M test request IR8175

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Frequency (MHz)

SDD

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Cable 1 A23 InitialCable 1 A56 InitialCable 1 A1314 InitialCable 1 A1617 InitialCable 2 A23 InitialCable 2 A56 InitialCable 2 A1314 InitialCable 2 A1617 InitialSDD21 limit line

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Frequen cy (M Hz)

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Cable 1 A23 In itialCable 1 A56 In itialCable 1 A1314 InitialCable 1 A1617 InitialCable 2 A23 In itialCable 2 A56 In itialCable 2 A1314 InitialCable 2 A1617 InitialCable 1 A23 10 bendsCable 1 A56 10 bendsCable 1 A1314 10 bendsCable 1 A1617 10 bendsCable 2 A23 10 bendsCable 2 A56 10 bendsCable 2 A1314 10 bendsCable 2 A1617 10 bendsSDD21 limit line


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Inse

rtio

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ss (d

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SL8800 Cable with Longitudinal Shield

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Conventional Cable with Spiral Wrapped Shield

SL8800 Cable with Longitudinal Shield

Improved High-Speed Electrical Performance

9 Gbps 1 meter

Conventional twin axial cable


15% greater eye opening

Conventional twin axial cable has an undesirable resonance

which 3M Twin Axial Cable does not


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3M™ Twinax + SPEED Connector Design…

0.750 max height

Length 2.1” with latches open

80 total contacts

Paddle card design

3M™ SPEED connector


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3M™ Twinax + SPEED Connector Prototype…Right Angle

Vertical

Paddle Card design


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3M™ Twinax + SPEED connector DUT…

Two SPEED boardmount connectors and two paddle card connectors interconnected by 0.5 meter 30(1) SPC twin-ax cable with semi-rigid launches


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10 Gbps / 35 ps rise time > 80% opening factor


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25 Gbps / 10 ps rise time > 57% opening factor


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Reduced EMICommon Mode Power Transfer

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Frequency (MHz)

CM

PT (d

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Traditional spiral-wrapped Twinax

SFF-8410 recommended limit

Common Mode Power Transfer

-70.00

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Frequency (MHz)

CM

PT (d

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Traditional spiral-wrapped Twinax

3M SL8800 Twinax

SFF-8410 recommended limit


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Termination Steps and Benefits

Cut

Strip shield layers

Laser ablate prim. insulation

Apply to paddle card and solder

• No wire management fixtures required

• Simultaneous stripping of four pairs

• Simultaneous registration of the 4 pairs to the PCB

• Consistent wire presentation conducive to automating termination process


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What’s Next for 3M™ Twin Axial Cable?• Various configurations and customizations of the Internal 3M

Twin Axial Cable are in development, some are available today• Narrow pair spacing• Different pair counts, additional sidebands• Other wire gauges• Fan-outs• Others – contact 3M to discuss

• External Jacketed Cable is in development and will achieve a unique combination of performance benefits Launching soon in 2011• 4-pair: 28 and 30 AWG QSFP+, miniSAS External• 2-pair: 32 and 30 AWG SFP+


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Learn More about 3M™ Twin Axial Cable• Get more information at 3Mtwinax.com:

• Tech Datasheets, Drawings, Product Specs• Product Video • Order Samples• Product News

• Contact your local 3M Sales Rep• Contact a Technical or Business Team Member – email

[email protected] OR Click on “Contact Us” at 3Mtwinax.com


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Thank you


www.3Mtwinax.com

3M Electronic Solutions Division 3M™Twin Axial Cable - … · Coating Ce Ceramics Ep Electronic...

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