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www.us-tech.com Tracking Down Counterfeit ICs Continued from previous page
ground and the operator only sees a simple “Good Device”, “Blank Device” or “Fail Device” message, with the option to produce a detailed report to send to the supplier. Sentry contains a set of ZIF
sockets that accept adapters for DIP, SOIC, BGA, SSOP, as well as discrete components. The system uses a com- parative technique to rapidly analyze and learn new components, and then test the unknown parts. A known good component is locked into the ZIF socket while a test pattern is applied across all its pins. The component’s response to this test pattern, or PinPrint™, is automatically meas- ured and stored as a benchmark.
Parameter Settings The instrument uses a combina-
Will the genuine IC please stand up? Outside markings can be made to look identical on real and counterfeit ICs.
tion of electronic parameter settings (voltage, frequency, source resistance and waveform) to generate the “sig- nature” for each pin of the IC being checked. It then compares the unique electrical characteristics of known components against suspect compo- nents. Testing between every possi- ble pin combination is included, max- imizing the chances of capturing internal fault conditions. Sentry can quickly detect missing or incorrect die, lack of bond wires, inaccurate pin-outs and pin impedance varia- tions. Simple pass or fail results are returned after testing, offering a high level of confidence in the
authenticity of components. As parts become increasingly complex, 100 percent testing becomes burden- some, but testing one or two pieces for, say, 200 pieces is manageable. Experience has shown that varia- tions arising from a suspect ship- ment will reveal themselves well before such a test is complete. Nevertheless, if 100 percent non- destructive testing is required, using a Sentry Counterfeit IC Detector is the appropriate solution.
December, 2012
The outside package marking does not match the real manu- facturer of the die inside in this fake IC.
The system provides a very spe-
cial solution: the quick and easy detection of counterfeit ICs and com- ponents. It is able to identify parts that have a different internal struc- ture, or no structure at all, and even components originating from a differ- ent manufacturer. It is an easy-to-use instrument, capable of checking all types of components, ranging from simple two pin devices to more com- plex packages such as QFP and BGA. Controlled via USB using the
2D X-Ray Image X-Plane™ Slice X-Plane™ Slice
provided PC software, the device library can be built up by adding spe- cific known good devices. Each device can have documents associated with it, such as photos of device markings, data sheets, and other documents to further help in confirming the integrity of a device. Sentry contains all the hardware required to analyze the electrical characteristics of ICs with up to 256 pins. 256-pin+ devices can also be tested by rotating the device (BGA, QFP) to allow all pins to be learned and compared. The instrument is supplied with four 48- pin dual in line (DIL) zero insertion force (ZIF) sockets; these can be used directly for older DIP components but can also be used to accommodate a variety of additional socket adapters available for different pack- age types. The socket adapter can contain multiple IC sockets if required, to allow testing several ICs at the same time or comparing one IC with another. An expansion con- nector allows custom socket adapters with up to 256 pins to be attached. Designed in Europe by ABI
• • • • •
Electronics Ltd., an important manu- facturer of PCB testing equipment, Sentry has been created for compo- nent distributors and manufacturer Receiving Departments for sample testing.
Other application areas include
electronics components suppliers using improving their quality assur- ance programs. Detailed reports can be saved to provide quality control traceability. The unit guards produc- tion facilities from the infiltration of counterfeit devices, by identifying bad parts before they have a chance to be mounted on PCBs — saving time, money and frustration. Contact: Saelig Co. Inc., 71
Perinton Parkway Fairport NY 14450 % 888-772-3544 or 585-385-1750 fax: 585-385-1768 E-mail:
info@saelig.com Web:
http://www.saelig.com r
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