[hpsdr] [OZY] Schematic Update for 12 May 2006

[Ahti Aintila]

Phil,
I have asked for samples of CDSOT23-SR724. There are several Bourns'
dealers in Europe.
You may also check these STMicroelectronics components, the data
sheets are very informative:
Very low capacitance, 2 lines, easy layout, highly recommended:
<http://www.st.com/stonline/products/literature/ds/11265.pdf>
Ultra low capacitance, 4 lines:
<http://www.st.com/stonline/products/literature/ds/11599.pdf>

Hopefully you can find a local source. If not, I may try my contacts.

73, Ahti OH2RZ


On 13/05/06, Philip Covington <p.covington at gmail.com> wrote:
> On 5/12/06, Ahti Aintila <oh2rz.sdr at gmail.com> wrote:
> > Phil,
> >
> > Your selection of Littlefuse PGB Series ESD suppressor is good against
> > short transients. If you want a RoHS compliant component, you may take
> > PGB102ST23WR. Whichever, but a better place would be next to the
> > connector.
> > On the other hand, this type of component is good only for short ESD
> > transients, they clamp only to 150V (plus or minus). They cannot
> > protect against longer lasting overvoltage surges of DC power.
> >
> > My recommendation is Bourns . It protects 4 lines, it is
> > USB 2.0 compatible (Cj 3 pF), RoHS compliant and can handle both ESD
> > transients and overvoltage surges. See :
> > <http://www.bourns.com/pdfs/CDSOT23-SR724.pdf>. Best place for this
> > component is between the common mode coil and the USB chip.
> >
> > 73, Ahti OH2RZ
> >
>
> Hi Ahti,
>
> Can you recommend a supplier for this?  I have had no luck finding
> this part CDSOT23-SR724
>
> 73 de Phil N8VB
>

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