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Hot!PIC16F1508 ESD Protection for EUSART

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JDW
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Re: PIC16F1508 ESD Protection for EUSART 2019/09/07 21:04:32 (permalink)
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Thank you for your kindness in providing that detailed simulation! I certainly appreciate it.

One question. Why use the Schottky diodes instead of silicon diodes like BAT54S? Switching speed?
post edited by JDW - 2019/09/07 21:08:27
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PStechPaul
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Re: PIC16F1508 ESD Protection for EUSART 2019/09/08 00:25:09 (permalink)
+1 (1)
Switching speed and lower voltage drop. But they have more leakage. There are always tradeoffs. I don't have a model for a TVS diode, but it looks like it might not be needed, although it wouldn't hurt. Simulations go only so far - it would be interesting to do testing on actual hardware. But it would require specialized and expensive equipment to do properly.

 
#22
ric
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Re: PIC16F1508 ESD Protection for EUSART 2019/09/08 00:25:37 (permalink)
+1 (1)
A BAT54S is a shottky diode!
(Well a pair of them actually.)

I also post at: PicForum
Links to useful PIC information: http://picforum.ric323.co...opic.php?f=59&t=15
NEW USERS: Posting images, links and code - workaround for restrictions.
To get a useful answer, always state which PIC you are using!
#23
JDW
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Re: PIC16F1508 ESD Protection for EUSART 2019/09/08 00:31:25 (permalink)
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Thanks for pointing that out, Ric. My eyes overlooked that word in the datasheet and I simply focused on the diode symbol which unfortunately is incorrect in that it is for a standard diode instead of a Schottky.
#24
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