Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!umd5!cgs
From: cgs@umd5.umd.edu (Chris Sylvain)
Newsgroups: sci.electronics
Subject: Re: help me build a "static simulator"?
Message-ID: <4556@umd5.umd.edu>
Date: 22 Feb 89 03:47:50 GMT
References: <229@tree.UUCP>
Reply-To: cgs@umd5.umd.edu (Chris Sylvain)
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Organization: University of Maryland, College Park
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There are currently (no pun intended, really!) a number of competing ESD
models and methods for testing the effects of human body discharge on
electronic components.

First, Check the following references:

MIL STD 883C, Test Methods and Procedures for Micro Electronics
DOD STD 1686, Electrostatic Discharge Control Program for Protection of
              Electrical and Electronic Parts, Assemblies and Equipment
DOD HDBK-263, Electrostatic Discharge Control Handbook for Protection of
              Electrical and Electronic Parts, Assemblies and Equipment
(note the DOD STD and the DOD HDBK are quite different documents, regardless
 of the similarity of their titles)

Rutherford, D.H. and Perkins, J.F., Effects of Electrical Overstress on
    Digital Bipolar Microcircuits and Analysis Techniques for Failure Site
    Location, Electrical Overstress/Electrostatic Discharge Symposium
    Proceedings, EOS-1, IIT Research Institute, Rome NY, pp. 64-77
Enders, J., Susceptability of IC's in ESD Step-Stress Tests, EOS-3, pp. 106-113
Shaw, R.N. and Enoch, R.D., A Programmable Equipment for Electrostatic
    Discharge Testing to Human Body Models, EOS-5, pp. 48-55
McAteer, O.J., Twist, R.E. and Walker, R.C., Latent ESD Failures, EOS-4,
    pp. 41-48

International Electrotechnical Commission (IEC) Pub. 801-2, Electrostatic
    Discharge for Industrial Process Control (formerly IEC 65 (Secr) 80)

NEMA, Residential Controls, Environmental Testing for Electronic Controls,
    Part DC33, Proposed June 24-25, 1982

EIA (Electronic Industries Association) Standards Project PN-1361,
    Environmental and Safety considerations for Voice Telephone Terminals,
    Draft 6, 1985

ECMA (European Computer Manufacturers Association), Electrostatic Discharge
    Susceptability, TR/23, Sept. 1984

SAE Standard Recommended Practice Information Report J-121, June 1978,
    pp. 20-99

Underwriters Laboratories Inc. Standard UL 1023, Household Burglar-Alarm Units,
    May 13, 1983, pg. 33

Second, in summary, note the following models are used:

(all models are a capacitor with a resistor between the cap and the equipment)

IEC --> 150pf and 150 ohms, currently under revision to 100pf and 500 ohms.
        Cap is charged to positive 15 kV max.

EIA --> 100pf and 500 ohms to 10 kV, 60 pf and 10,000 ohms to 20 kV.

NEMA -> 100 pf and 1500 ohms. 20 kV max.

SAE --> 300 pf and 5000 ohms.

UL  --> 250 pf and 1500 ohms.

ECMA -> 150 pf and 1000 ohms. (150 pf and 20 ohms for equipment carts)

(real-world discharges can be as high as 25 kV to an extreme of 30 kV)

If you can figure out what all this means, then my hat's off to you!
-- 
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