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Re: [avr-gcc-list] How Hot does a 62256-15 SRAM Get?

From: Andy Warner
Subject: Re: [avr-gcc-list] How Hot does a 62256-15 SRAM Get?
Date: Fri, 9 Sep 2005 00:14:06 -0500
User-agent: Mutt/1.2.5i

User Tomdean wrote:
> I have a Packet Whacker.  I want to mount it on a PCB OVER a 62256-15
> for use with a AT8585 ATmega8515 running at 16 mHz.  The ventilation
> will be natural, but, not installed in a box.  Maybe in a 2 ft^2
> space.
> Am I going to have heat problems?  I have the data sheet, but, I can't
> figure this out.

I don't think you'll have any problem. at 100% duty cycle the
forst 62256 datasheet I found quoted a *worst case* current
draw of 70mA. Real life will be much lower than that.

What range of ambient temperatures do you expect ?

If you wanted to get totally paranoid (though I think this will
be a waste of your time and I wouldn't do it unless I expected
the unit to run at very high ambient temps) you can always
space the packet whacker further off the board by socketing it.

Andy Warner             Voice: (612) 801-8549   Fax: (208) 575-5634

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