How does one go about selecting a connector that is sufficient for their design?
Items to be considered include connector performance, routing efficiency, and pin density. For more information, contact ourSignal Integrity Support。
我们如何解决这个问题,“这连接吗or work in my design"?
The following information about your application will help determine if a connector system can meet the signal integrity requirements: - System Topology: point-to-point, multi-drop, point-to-many-point, Star, etc - Termination Type: Parallel (one/both ends), Products, Active, RC, none - Clocking/Data Recovery: synchronous, asynchronous, source synchronous, CDR - Signaling Type: Single-Ended or Differential - Data Encoding: Binary, PAM-2, PAM-4, etc - Signal Technology: examples include LVTTL, SSTL-2, Rambus, LVDS, PECL, CMOS, GTL+ - Signal Data Rate: specified in Mbps or Gbps - Signal Edge Rate: specify 10/90 or 20/80 - System Impedance - specified in ohms along with tolerance (e.g., +/- 10%) - Crosstalk Requirements: specified at receiver (in % of voltage swing or dB) - Skew to make educated recommendations. For more information, contact ourSignal Integrity Support。
Does the stack height of the connector make a difference in its speed?
Always choose the shortest connector that can do the job. The shorter the connector, the shorter period of time for reflections and crosstalk to act, and the better the signal quality. For more information, contact ourSignal Integrity Support。
What is the optimal signal-to-ground ratio?
A signal-to-ground ratio of 1:1 is usually optimal, but for connectors with large pin arrays signal-to-ground rations of less than 1:1 may be required for reliable high speed single-ended operation. For more information, contact ourSignal Integrity Support。
For differential connectors running at 2.5 Gbps and above, ground shielding of the pairs can be very beneficial. For more information, contact ourSignal Integrity Support。
Does a connector’s impedance profile change relative to system impedance changes?
No. The impedance discontinuities inherent to the connector’s design are independent of the characteristic system impedance.
Can I use your high speed connectors to distribute power?
If the connector has ground blades (e.g., Q-products) that are used to distribute power through the connector, and the connector is used for high-speed signaling, then the following should be done: All signals passing through that section of the connector should be referenced to the same power plane being passed through the connector on both sides of the board, OR if referenced to ground, the power plane should be adjacent and close to the ground plane on both PCBs. This recommendation will ensure that the signal return path is unbroken across the connectors, increasing bandwidth and decreasing EMI.
If signal pins are used to distribute power through the connector, they should be placed considering the noise which can occur due to signal coupling. Signal pins passing power and ground are as susceptible to noise as any signal pin would be. Sensitive power signals should be well isolated with grounds on either side to reduce crosstalk. And for low noise power, such as a precision voltage reference, it may be necessary to isolate the power pin with multiple grounds on either side, and on the back side of the connector.
Check out theSamtec博客for the latest Signal Integrity Resources from the Samtec gEEk blogging team. We're working daily to populate the blog with the kind of great Samtec content you have come to know.
What type of analysis can I do with a Single-Line Model?
Single-Line models can be used to analyze - propagation delay, - attenuation, - reflections, - drive power, - timing. A SLM CAN NOT BE USED TO EVALUATE CROSSTALK! (FOR CROSSTALK - A MULTI-LINE MODEL MUST BE USED.)
What type of analysis can I do with a Multi-Line Model?
Multi-Line models can be used to analyze - propagation delay, - attenuation, - reflections, - drive power, - timing - electrostatic coupling - electromagnetic coupling - common mode noise - crosstalk.
What process does Samtec employ for making connector models?
Samtec.’s connector model’s are classified as one of the following: - Validated: Model created using Samtec’s defined modeling techniques. Simulation data from the model correlates with test data from the connector. - Developmental: Model created using Samtec’s defined modeling techniques, but has not yet been correlated against test data. These models may be "soft validated", where simulation data from the model is correlated with data obtained from a full wave 3D simulation. - Estimated: Model was created using engineering approximations (e.g., design similarities with another connector that has been modeled).
What CAE vendor formats does Samtec provide connector models for?
Samtec.supports the following simulation tools with connector models: Synopsis HSPICE, Cadence PSPICE, Mentor Graphics ICX (MMF format), Cadence SPECCTRAQuest SigXplorer (DML format), HyperLynx LineSim (SLM format), and HyperLynx 7.5 ELDO.
Will Samtec’s HSPICE and PSPICE models work with other SPICE-based simulation engines?
Yes, the structure of the SPICE connector model is such that it should run in simulators based on Berkeley SPICE 3F5.
Does Samtec offer IBIS models?
The IBIS Interconnect Modeling Specification (IBIS ICM 1.0) was approved on September 12, 2003 (http://www.eda.org/pub/ibis/connector/)。Samtec.is an active member of the IBIS Open Forum and plans on working towards providing true IBIS models now that the IBIS ICM specification has been approved. To date, Samtec has developed "SLM_general" ICM models. Availability of other ICM model types will be dependent on the simulation software vendors ability of importing IBIS ICM compatible models into their simulation packages.
What if I do not see a connector model available for the connector I am interested in?
联系our Signal Integrity Support and communicate your need for a model. We will work with you to help assess what is required and then add the request to our model production schedule.
The data in Samtec’s High Speed Characterization Test Reports reflects performance in 50 ohm single-ended and 100 ohm differential environments. How differently will the connector perform in other characteristic impedance environments (where the entities of the system - drive circuit, traces, and termination schemes - are designed to the same characteristic impedance)?
Impedance profile of the connector will not change, because the impedance discontinuities inherent to the connector’s design are independent of the characteristic system impedance.
Propagation delay through the connector will not change because the inductive and capacitive properties inherent to the connector’s design are independent of the characteristic system impedance.
Crosstalk (percentage of voltage swing) will not be affected. Crosstalk is a measure of the coupling between circuits, and is due to inductive and capacitive coupling within the connector. The coupling properties inherent to the connector’s design are independent of the characteristic system impedance.
Samtec.connectors meet FCC Class B EMI Requirements?
Federal requirements (FCC 47 CFR Part 15, EN55022, etc.) require EMI compliance testing of active electronic systems such as computers. While passive components can impact the overall system level EMI performance, it is not possible to directly test a connector, cable assembly, resistor, or bolt for EMI compliance.
Shielded connectors and cable assemblies help reduce emissions and improve immunity of electronic products?
Yes they can help, and in some cases dramatically. Signals that have periodic switching such as clock lines are a classic noise source. If energy from this type of source couples to a cable that exits a shielded enclosure, the cable can radiate the coupled noise much like a cell phone antenna radiates (although not as efficiently). Placing a shield over the cable (and terminating the shield properly) can reduce the radiated emissions dramatically. For a board to board connector inside an enclosure, the situation is similar except the radiated emission occurs inside the enclosure so the radiated emission may or may not be visible during an EMI test.
How much shielding does the Q2™ products have compared to Q Series™ products?
Testing showed an improvement of 10-20 dB over the frequency range of 1-4 GHz and 0-10 dB from 4-10 GHz. This was a comparison test where the radiated field of the shielded connector (Q2™) was compared to the radiated field of an unshielded connector (Q Series™). The key to a meaningful test is that all variables in the test setup and on the test board need to the same for both tests. Full wave simulation showed an improvement of approximately 10 dB over the 1-10 GHz frequency range as well.
What are the best practices to reduce EMI when using a board to board (BTB) connector?
There are a few assumptions that need to be stated up front before we get into answering this question:
It is important to understand the radiation mechanism or dominant EMI antennas in a BTB system. One analogy that works well is to consider the PCB ground planes as elements of a microstrip patch antenna. Any longitudinal voltage potential developed across the connector appears as a voltage source which serves to drive the PCB ground planes, not unlike a feed element driving a microstrip patch antenna. This is a useful low frequency (50 MHz to 100’s of MHz) approximation; at higher frequencies the radiating system is more complex but the best practices remain the same.
To minimize the longitudinal voltage potential across a connector, we need to minimize the self-partial inductance of the signal return path. Some brief terminology definitions are needed:
Loop inductance is the only inductance that is “real" or can be measured. Self-partial inductance is a useful mathematic construct; it can be calculated but not directly measured. “Self" means we are interested in the magnetic flux developed from only one conductor of the loop. “Partial" means we are looking at only a portion of the path, specifically the portion between the PCBs.
A short BTB stack height is better than a taller BTB stack height. Minimize the loop area in the connector by having ground pins integrated into the signal pin field (1:1). Use broad, flat conductors for signal return, dedicated planes are superior to pins for signal return Make the characteristic impedance of the signal and ground pattern as low as possible.
The same physics that applies to EMI reduction in BTB connectors also apply to PCBs. Disruptions in the signal return path such as splits in the ground plane drastically increases the self partial inductance of the return path which can lead to EMI problems.
最好的电子产品是consid EMI策略er multiple areas such as PCB design (stackup and circuit layout), connector selection, signal return management (grounding), power filtering (decoupling/PI design) and logic selection with an emphasis on spread spectrum clocking and edge shaping.
Does Samtec have testing procedures for their Power Integrity Products?
Creepage and Clearance requirements vary greatly depending on the actual application and as such must be dealt with on an individual basis. Please contact Samtec’sEngineering Support Group (ESG)for further information regarding Creepage and Clearance.
Does Samtec have a specific group to contact for questions related to power connectors and/or their testing?
Does Samtec have associates trained specifically to handle Interconnect Processing issues?
Samtec.’s Interconnect Processing Group (IPG) is an in-house staff of Engineers to field all of your interconnect processing concerns. IPG can assist you in improving the overall processing and manufacturability of your board as well as helping lower its total applied cost. You may contact IPG directly by email@example.com.。
Does Samtec have online Interconnect Processing Resources?
Visit the加工文学page for in-depth information on the following and more.
Does Samtec have information on Paste In Hole (PIH) Processing?
Paste In Hole technology employs the same techniques for through-hole soldering as those used for standard surface mount connectors and components. Samtec provides the recommended stencil aperture and plated through-hole sizes for most connector products capable of being processed using Paste In Hole technology on the connector footprint. To be a candidate for Paste In Hole soldering, a connector must have an insulator body material capable of withstanding lead and/or lead-free reflow temperatures, and vertical and horizontal clearance around leads large enough to allow adequate printed solder paste volume. For more information on Paste In Hole processing, see this eBook:Paste in Hole Reflow by Bob Willis, and other helpful information on our加工文学下面的页面‘Paste In Hole Processing’ menu.
Does Samtec have any recommendations for processing multiple fine pitch SMT connectors on a single board?
The majority of Samtec’s vertical board-to-board connectors are capable of being used in applications where multiple connectors are placed on a single board and mated simultaneously. When using multiple connectors per board, there is a higher potential for misalignment. To prevent this issue, closely follow Samtec’s recommended footprint and stencil designs, ensure a good solder print, machine place the components, and hold the drill diameter tolerances for the alignment pin holes to +/- .002" [0.05 mm]. Each connector product has a unique maximum recommended misalignment in the X and Y directions to ensure a good mate. For the maximum X and Y misalignment of a specific product, please contactIPG。
The processing recommendations for Samtec’s Q Strip® Products edge mount connectors can be found on our加工文学下面的页面'边缘安装连接器'menu.
Samtec., Inc. has verified that our connectors may be cleaned in accordance with the solvents and conditions designated in the EIA-364-11A standard.
Are the solder joints of Samtec’s .050" pitch SEARAY™ connectors capable of satisfying IPC-A-610 Class 3 criteria?
Where is the nearest authorized Samtec Distributor?
Samtec.is represented by technical sales organizations and stocking distributors all over the world.
Samples can be ordered on-line through the我的samtecFree Samples Page。They are processed within 24 hours of request and shipped.
Is there a way to customize a standard Samtec connector?
Absolutely. Samtec products have a high level of flexibility. Our flexible customization options allow you to modify a standard connector or design a product from the ground up. Visit ourCustom Products页面以获取更多细节。
Is testing information available for Samtec products?
Samtec.products undergo extensive qualification testing by independent laboratories to ensure the highest quality interconnect products. They are also subject to general specifications and standard test procedures.
You can find test reports for any Samtec product on the Technical Specifications page for that product. Simply type your product into the search and click the instant result for your product. You'll find your test reports in the Product Toolbox.
是。Our My Samtec system allows anyone, including those without a My Samtec account to make a purchase directly from Samtec.com. Simply use our website tools to add parts to your cart. Once you are finished, just follow the checkout process and your parts will be on their way.
Samtec.uses GE Information Services (GEIS) to conduct business transactions via standard EDI document transmission. We trade both ANSI ASC X12 and EDIFACT standards. Current documents traded in the ANSI ASC X12 standard are: 810, 824, 830, 846, 850, 855, 856, 860, 865, 870, and 997. The current EDIFACT documents traded are INVOIC, DELFOR, ORDERS, ORDRSP, ORDCHG, and CONTRL.
If you are interested in conducting EDI transactions with Samtec, please contact Daniel Williams with the documents you require via EDI and the monthly volume of these documents.
Yes, Samtec accepts Visa, Mastercard, and American Express
What is Samtec's cage code number?
What is Samtec’s Tax ID number?
Samtec.'s UL number is E111594-N.
Is testing information available for Samtec products?
Samtec.products undergo extensive qualification testing by independent laboratories to ensure the highest quality interconnect products. They are also subject to general specifications and standard test procedures. You may了解更多关于我们的测试程序。
Is Samtec QS9000 approved?
Yes, Samtec is QS9000 approved at its corporate headquarters in New Albany. Samtec UK in Scotland and Samtec AP in Singapore are both ISO9002 approved.
ELV - （欧盟指令2000/53 / EC）寿命终结器指令旨在减少ELV的环境不友好的浪费金额。
WEEE (EU Directive 2002/96/EC) The Directive on Waste Electrical and Electronic Equipment.
RoHS (EU Directive 2002/95/EC) The Reduction of Certain Hazardous Substances. Lead, Cadmium, Mercury, Hexavalent Chromium, Polybrominated Biphenyls (PBBs) and Polybrominated Diphenyl Ethers (PBDEs) are banned from most electronic products offered for sale in Europe effective July 1, 2006.
Penta/Octa (EU Directive 2003/11/EC) This directive bans the use of PentaBDEs and OctaBDEs. This directive is currently in effect in EU. The two banned substances are fire retardant additives (Pentabromo diphenyl ether and Octabromo diphenyl ether).
What is driving the move to RoHS compliant/lead free (Pb-free) products?
In an effort to reduce the amount of electronic waste spreading across European landfills, the European Union (EU) has banned most electronic products containing intentionally added lead and other hazardous chemicals.
Why ban lead?
Lead is only 1 of 6 banned substances. But because it has many different uses lead is the most prominent substance detailed in the RoHS directive for Electronic and electrical equipment manufacturers to be concerned about. Lead is a core component of the solder that goes into the manufacture of printed circuit boards (PCBs). PCBs are increasingly used in everyday household items, from toasters to DVD players and are increasingly finding their way into landfills across the world. The acidity of rainwater washes the solder lead from crushed PCBs. The lead can eventually end up in drinking water supplies. Lead can affect almost any organ and system in the body. The most sensitive is the central nervous system, particularly in children. Lead can also damage the kidneys and reproductive system, and cause anemia.
What lead-free plating is available on Samtec products?
The majority of our plating is lead free and/or RoHS compliant. CLX products or any contact that is pre-plated may not be compliant. Depending on the part number, plating call out and the processing temperatures you may need to choose a Matte Tin finish. Bright Acid Tin will discolor at the elevated processing temperatures of lead-free, reflow soldering and will need to be changed to Matte Tin (TM, LM, FM or SM plating designations). The plating options should be listed in the catalog and/or on the print.
这取决于数量。如果一个部分包含s intentionally added lead, or if the processing temperatures are increased and the current insulator can’t withstand those temperatures, the composition of the part must be altered to accommodate the elevated temperatures and eliminate the intentionally added lead (unless there is an approved Directive exemption as in the case with the brass alignment pins). This would require a part number change.
这取决于部件编号。在马的左手rgin of the catalog pages under specifications, you will find the processing information. Reflow processing will need a high temp body and matte tin finish. Samtec recommends through hole parts that have a high temp insulator be changed to matte tin as well.
What is the MSL (Moisture Sensitivity Level) classification of your lead-free products? Do your parts comply with J-STD-020C?
J-STD-020C refers to the moisture sensitivity of SMT electrical components. There is no relation or connection to the RoHS Directive. Generally speaking, the MSL is not a concern for Samtec parts. We classify all of our SMT parts as MSL Level 1. J-STD-020C is not applicable for through hole parts.
Will your lead-free parts / packaging be marked lead-free, do you comply with JEDS97?
As of October 2005, Samtec is providing a Directive compliancy label on the lowest level shipping container for the majority of products.
Are you intending to change your part-numbering system to reflect a change to lead-free?
这取决于部件编号。If the part contains intentionally added lead or if higher processing temperatures will be used, you will need to ensure the plating finish and the insulator can withstand the elevated temperatures. In those cases yes, a part number change will be required.
Do you have a definitive date when lead-free parts will be introduced?
Why are you recommending a change to Matte Tin plating?
A plating containing bright acid tin can discolor when exposed to the higher processing temperatures of lead-free, reflow soldering. Therefore it is recommended that the BAT be changed to change to Matte Tin. We are recommending that through hole parts with high temp insulators also be changed to a matte tin finish.
Are your products compatible with Pb assembly procedures (backwards compatible)?
Are your products compatible with Lead Free processing?
这取决于数量。The composition of the part determines the processing compatibility. You must determine if the part is free of intentionally added lead as well as ensuring that the insulator and plating finish can withstand the elevated processing temperatures.
Are you claiming exemptions for any parts?
是。Parts with brass components (such as brass Alignment pins) may contain intentionally added lead. The brass components (a copper alloy) contains a quantity of intentionally added lead within the 4.0 wt. % exemption of the RoHS Directive for copper alloys in electronic components.
The Matte Tin and Bright Tin platings applied by Samtec are essentially 100% pure Tin. The Matte Tin applied by Samtec contains approximately 0.015% co-deposited organics as opposed to Bright Tin with approximately 0.15% co-deposited organics.
Are Matte Tin and Bright Tin compliant with the European Union RoHS Directive?
The Matte Tin and Bright Tin platings applied by Samtec are compliant with the RoHS Directive (Directive 2002/95/EC).
Is Matte Tin compatible with leaded solder processes?
No high-Tin plating process can claim to be whisker-free. Copper/copper-alloy lead frames plated on a Nickel diffusion barrier are highly whisker resistant.
Does Samtec use a barrier plating or underplating with Matte Tin?
What is the thickness of the Matte Tin plating applied by Samtec?
The thickness of the Matte Tin plating is part specific. The majority of products will have a minimum 150 micro-inch to 350 micro-inch plating thickness.
Is there a price penalty for Matte Tin?
Will specifying Matte Tin impact my lead times?
The lead times for the majority of Samtec products will not be affected by specifying Matte Tin plating.
Can I continue to order product with Bright Tin plating?
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