AVR-Chat

Jim, a quick question.  It's probably a dumb one, but I'm getting a bit
paranoid that I could be missing something.  I assume the leakage current
only occurs when the line is high, or more correctly, above ground (ignoring
transient events).  If so any active-low line that is pulled high when not
asserted (say using the internal pull-up in the uC) would be incurring this
leakage current when "idle".  Is that correct?  

The Transguard series has a pretty high leakage current, 100 uA.  So with,
say, 50 lines pulled high, all with a Transguard, this adds up to 5 mA, way
more than what the AVR itself will consume on average!   It's beginning to
look like another "gotcha" to me and I should really switch to lower leakage
current ones like the Staticguards at 10 uA.

Thanks, Steve

| -----Original Message-----
| From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On
| Behalf Of Jim Wagner
| Sent: Saturday, January 08, 2011 11:57 AM
| To: AVR-Chat@yahoogroups.com
| Subject: Re: [AVR-Chat] AVX Transguard
| 
| Yes, that was the "I think" caveat. That suggests being able to use
| smaller limiting resistors.
| 
| The high capacitance CAN be a challenge. Sometimes, it will actually
 

__________ Information from ESET Smart Security, version of virus signature
database 5775 (20110110) __________

The message was checked by ESET Smart Security.

http://www.eset.com