Lpc2000

Mauricio Scaff wrote:

> From the Philips Datasheet
>
>Price : 0,08 / 100 pcs @ Digikey
>240mV @ 0,1mA (that's far more than the RTC uses)
>
>With do you need this resistor ? And even if you need it, let's see:
>Using a 1K resistor, and a RTC current of 20uA gives you a dropout of  
>20mV ....
>
>I use this a lot and I'm sure it works very well.
>
>  
>
If you are doing a commercial design which has to under Underwriters 
Labratories testing,  They require that you need the current limiting 
resistor in the event that the diode shorts the battery won't rupture 
due to excessive current.

TomW


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
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