Re: [SI-LIST] : Interesting ESD devices

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From: Douglas C. Smith (doug@dsmith.org)
Date: Sun Aug 13 2000 - 21:40:32 PDT


Hi Peter et al.

When using devices such as these, even if they are perfect
(infinitely fast clamp to zero volts with zero series
resistance), a path on a multilayer board connecting to the
devices can have significant voltage drop. 5
volts/millimeter inductive drop from an ESD event is easily
obtained and exceeded! Layout is VERY important.

Devices such as these can prevent damage if properly used.
However, data corruption on the protected lines is still
likely to occur and must be handled by other design
techniques. In quite a few cases, these techniques can
eliminate the need for the protective devices in the first
place.

Doug

Peter Baxter wrote:
>
> Hi Avi,
>
> Take a look at Bussmann's SURGEX parts and Littelfuses PULSEGUARD parts.
>
> Very low capacitance, around 1pf. 0805, 0603 or strips to suit DB
> connectors. Be aware that they have more styles available than shown on
> their promotional material.
>
> I found Littelfuse to be very helpful.
>
> Regards,
>
> Peter Baxter
>
> Date: Wed, 9 Aug 2000 08:03:12 +0300
> From: Greenhut Avi-BCMS17 <Avi_Greenhut-BCMS17@email.mot.com>
> Subject: [SI-LIST] : Guideline comparison between ESD devices
>
> I am looking for the ESD guideline that includes the following
> information:
>
> 1. Type of ESD component devices that are available in the market.
> 2. The ESD component devices application.
> 3. Comparison between the types according to the applications.
>
> Avi Greenhut
> Motorola Communication Israel
> 3 Kremenetski Street P.O.B 25016 Tel - Aviv 67899 Israel
> Tel: 972-3-565-8795 , Fax: 972-3-565-8778
> E-mail: BCMS17@email.mot.com
>
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