3M™ Shielded Controlled Impedance (SCI)
Latch/Eject Header 2 mm Development Kit
Instructions
Contents
1.0 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Development Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
A. Kit Part Description
B. Kit Components
3.0 Description of Development Kit Components . . . . . . . . . . . . . . . . . . . . 5
A. PCB Test Boards with Header and SMA Connectors
B. 3M™ SCI Cable Assemblies 2 mm
C. 3M™ SCI Cable Assembly Carrier 2 mm
4.0 Testing Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.0 Test Data Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.0 Additional Technical Assistance and Information . . . . . . . . . . . . . . . . . . 13
3
1. 0 PURPOSE
The purpose of this development kit is to provide the necessary components for
testing and characterizing the signal integrity of 3M™ SCI Latch/Eject Headers 2
mm and 3M™ SCI Cable Assemblies, 2 mm, Coaxial and/or Twinaxial. To enable
immediate testing, specific kits are provided with headers mounted to a test board
populated with multiple single-ended and differential SMA connections. For
convenience, these connections allow both ends of a cable assembly to be connected
to the same test board for “thru type” measurements. If separate ground planes are
desired, two kits may be purchased to perform similar “thru type” measurements
utilizing two different test boards.
2.0 Development Kits
Kit Part Description Part #
SCI Latch/Eject SMT Vertical Header 2 mm (without PCB test board) PN 9401
SCI Latch/Eject SMT Vertical Header 2 mm soldered to PCB PN 9402
SCI Latch/Eject PTH Vertical Header 2 mm (without PCB test board) PN 9403
SCI Latch/Eject PTH Vertical Header 2 mm soldered to PCB PN 9404
For additional development kit ordering information, see Technical Data Sheet
TS-2298.
Kit Components
A. PCB test board with 3M Latch/Eject Vertical Header 2 mm
(Part numbers 9402 and 9404 only)
4
A PCB test board will include a pre-installed vertical header and eight each
SMA connectors to enable immediate testing. The SMA connectors are screwed
down to the board to provide a compression connection, providing the end user
the flexibility to easily replace and/or move to other test locations if needed. If
additional channels are needed, the end user can order and install additional SMT
type SMA connectors such as Molex part number 73251-1850 or 73251-1851,
which includes two lockdown screws.
NOTE: Kits that do not include a PCB test board (i.e. part numbers 9401 and
9403) will include a 2x25 position (SMT or PTH) latch/eject header for assembly
to end user’s test board.
See 3M™ Latch/Eject Header 2 mm Data Sheet TS-2199 for additional header
information.
B. 3M™ SCI Cable Assemblies 2 mm
Each kit provides three each double-ended coaxial and three each twinaxial 2 mm
SCI Cable Assemblies. Each assembly is approximately 24 inches long.
See 3M SCI Cable Assembly 2 mm Data Sheet TS-2105 for additional assembly
information.
C. 3M™ SCI Latch/Eject Cable Assembly Carrier 2 mm
Each kit provides a 2x25 cable assembly carrier to support and align SCI
connectors for insertion into the 2 mm latch/eject header.
See 3M SCI Cable Assembly 2 mm Data Sheet TS-2105 for additional carrier
information.
5
3.0 Description of Development Kit
Components
A. PCB Test Boards with Header and SMA Connectors
1. FR4 dielectric material
2. Dielectric constant (≈ 4.4)
3. Loss tangent (≈ 0.035)
4. 1oz Cu / 35 micron (1.38 mils)
5. Trace Width: 0.035 mm (0.0125 inches)
6. Trace Length: 25 mm (1 inch)
Each PCB test board is designed with 50Ω signal traces routed from SMT SMA’s to
the latch/eject header...
Four each 50Ω single-ended lines (identified S1, S2, S3 and S4)
Four each 100Ω Differential lines (S5P/S5N, S6P/S6N, S7P/S7N, S8P/S8N)
Note 1: two 50Ω single-ended lines are used to drive 100Ω differential lines.
Note 2: “P” = positive signal and “N”= negative sign is for reference only.
Note 3: Header pins (between S2 and S3) and (S6P/S6N and S7P/S7N) are
grounded (see crosstalk setup in section 4.0).
Optional calibration traces included (50 Ω Single-ended)
One each 1x “THRU” trace
One each 2x “THRU” trace
One each “OPEN” trace
One each “SHORT” trace
One each 50 Ω LOAD trace terminated with 50 Ω SMT resistor
6
PCB test board layout for 3M™ Latch/Eject Header SMT
PCB test board layout for 3M™ Latch/Eject Header PTH
Single-ended Test
Locations SMA to
Header traces
Single-ended Test
Locations SMA to
Header traces
Four pre-installed
SMA connectors
identified by white
rectangles
Four pre-installed
SMA connectors
identified by white
rectangles
SMA Connector SMT
pads for optional
Calibration traces
(seven places shown)
SMA Connector SMT
pads for optional
Calibration traces
(Seven places shown)
Differential Signal
Test Locations SMA
to Header traces
Differential Signal
Test Locations SMA
to Header traces
Four pre-installed
SMA connectors
identified by white
rectangles
Four additional SMA
pads available for
end user connector
installation
Four pre-installed
SMA connectors
identified by white
rectangles
Four additional SMA
pads available for
end user connector
installation
Latch/Eject Header SMT Pads (2x25 places shown)
Note: Header will be pre-installed
See 3M Latch/Eject Header Data Sheet
TS-2199 for additional information.
Latch/Eject Header PTH (2x25 places shown)
Note: Header will be pre-installed
See 3M Latch/Eject Header Data Sheet
TS-2199 for additional information
7
B. 3M™ SCI Cable Assemblies 2 mm
SCI Twinaxial Cable Assembly 2 mm
PN 98-3030-058-024.0-0 [3 each]
AWG 26(1) 100 Ω Low Capacitance Twinaxial Cable with 2 mm SCI Connectors
each end.
24 inches
24 inches
Signal
Ground
Signal
Signal
SCI Coaxial Cable Assembly 2 mm
PN 98-2929-027-024.0-0 [3 each]
AWG 26(7/34) 50 Ω Low Capacitance Coaxial Cable with 2 mm SCI Connectors
each end.
See Cable Assembly Specification TS-2105 for additional information.
8
C. 3M™ SCI Cable Assembly Carrier 2 mm
Carrier
Note: Orientation / polarity of SCI connector
when inserting into top of carrier...
Note: Orientation / polarity of SCI carrier
when inserting into header....
2 mm Latch
Eject/Header
Note 1: Latches must be moved to approximate position shown before
inserting carrier.
See 3M™ Latch/Eject Header Data Sheet TS-2199 for additional information.
Signal
ground
(CoaX VErSion)
19,38
[.763]
rEf
7,0 4
[.277]
rEf
polarization
Slot
SEE
notE #1
2MM SCi
CarriEr
aSSEMBlY
polarization
kEY
9
4.0 Testing Guidelines
Since this development kit provides the test engineer with multiple signal traces
on one PCB, “double-ended” SCI cable assemblies may be connected to the same
board to simulate a board-to-board connection scheme. If separate ground planes are
desired, two kits (with test boards) may be purchased to perform similar “thru type”
measurements.
Single-ended or Differential Signal Integrity testing that can be performed at
locations as noted below...
Single-ended
Channels
S1
S2
S3
S4
Differential
Channels
S5P/S5N
S6P/S6N
S7P/S7N
S8P/S8N
Note: SMA
connectors to be
installed on S6 and
S7 channels by end
user.
Signals
Signals
Signals
Grounds
10
Testing Options:
TDR / TDT Testing
Note 1: 35ps step input to board typically results in approx 38-40ps rise time at
header.
Note 2: Impedance of SMA connections typically 50 +/- 5Ω at 40ps rise time.
Network analyzer “S-Parameter” and Eye Pattern Testing
Note 1: SMA and test board losses will be included in measurement unless calibrated
out using calibration traces and structures provided.
Note 2: End user will need to install SMA connectors for calibration traces in order to
eliminate board loss and impedance mis-match of SMA connections.
Examples of TDT, S-Parameter and Eye Pattern “thru” test set-up on the
same board...
Carrier Header
Differential
Signals
Single-end
Signals
S2 to S3 “thru”
S1 to S4 “thru”
S6P/S6N to S7P/S7N “thru”
S5P/S5N to S8P/S8N “thru”
11
Carrier
Carrier
Header
Header
Differential
Signals
Differential
Signals
Single-end
Signals
Single-end
Signals
Aggressor
Victim
Aggressor
Victim
Aggressor
Victim
Aggressor
Victim
Crosstalk Test Setup example for “two adjacent aggressors” on the same
board...
Crosstalk Test Setup example for a “single aggressor separated by
grounded position” on the same board...
NOTE: Example test setups shown above utilize one test board; however, multiple boards
may be purchased for board-to-board applications utilizing separate ground planes.
12
5.0 Examples of Test Data for a 3M™
SCI Cable Assembly 2 mm (12 inches)
interconnecting two 3M™ Latch/Eject
Headers
TDR profiles at various rise times examples...
Insertion Loss (S-Parameter) examples...
Eye Pattern example...
1Gbps Single-ended ( 50% eye height ) 8Gbps Differential ( 50% eye height )
13
6.0 Additional Technical Assistance and
Information
Please contact your local 3M Sales or Customer Service Representative if you would
like additional assistance from our Signal Integrity Application Engineers.
• Website:www.3M.com/interconnects
• eTechServiceMailbox:esd-interconnect-etechservice@mmm.com
• CustomerService:(800)225-5373
• TS-2199DataSheetfor3M™LatchEjectHeader2mm
• TS-2105DataSheetfor3M™SCICableAssembliesandCarriers2mm
• TS-2298DataSheetfor3M™SCI2mmDesignKitswithtestboards,cable
assemblies and headers
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NOTES
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NOTES
Please recycle. Printed in U.S.A.
© 3M 2009. All rights reserved.
78-9100-7516-3A
Electronic Solutions Division
Interconnect Products
6801 River Place Blvd.
Austin, TX 78726-9000
1-800-225-5373
www.3M.com/interconnects
Important Notice
All statements, technical information, and recommendations related to 3M’s products are based on information
believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this product, you must
evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated
with such use. Any statements related to the product which are not contained in 3M’s current publications, or any
contrary statements contained on your purchase order shall have no force or effect unless expressly agreed upon,
in writing, by an authorized officer of 3M.
3M is a trademark of 3M Company. All other trademarks are owned by their respective companies.
Note: The test board used in the cover photo is for example only. See contents of this manual for full
description of the actual board.
Warranty; Limited Remedy; Limited Liability.
3M’s product warranty is stated in its Product Literature available upon request. 3M MAKES NO OTHER
WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above,
your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase
price of the 3M product. Except where prohibited by law, 3M will not be liable for any indirect, special,
incidental or consequential loss or damage arising from this 3M product, regardless of the legal
theory asserted.