[SI-LIST] Re: Effect of temperature on at 100C for DDR3/4 boards
- From: wcmartin1@xxxxxxxxxx
- To: "Barthi das" <barthi1@xxxxxxxxx>, si-list-bounce@xxxxxxxxxxxxx, "steve weir" <weirsi@xxxxxxxxxx>
- Date: Wed, 16 Dec 2009 13:36:07 +0000
Barthi,
IC parts are rated consumer (0 to 70C), industrial (-40 to 85C) and military
(-55 to 125C) on ensure the ICs can withstand the environment they will be used
in. Typically the performance degrades at higher temps and is reflected in an
IC's data sheet.
So if you are truly at 100C, I hope you are purchasing military grade ICs for
your board.
Regards,
Bill
Sent via BlackBerry by AT&T
-----Original Message-----
From: Barthi das <barthi1@xxxxxxxxx>
Date: Wed, 16 Dec 2009 04:58:25
To: steve weir<weirsi@xxxxxxxxxx>
Cc: <si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] Re: Effect of temperature on at 100C for DDR3/4 boards
Steve,
Thanks for correcting me. Its 100C
Regards
Barthi
--- On Wed, 12/16/09, steve weir <weirsi@xxxxxxxxxx> wrote:
> From: steve weir <weirsi@xxxxxxxxxx>
> Subject: Re: [SI-LIST] Effect of temperature on at 200C for DDR3/4 boards
> To: "Barthi das" <barthi1@xxxxxxxxx>
> Cc: si-list@xxxxxxxxxxxxx
> Date: Wednesday, December 16, 2009, 7:09 AM
> Did you mistype? Do you mean
> 100C? 200C is way beyond any DDR chip spec, controller
> or memory, and way beyond the safety classification for any
> conventional FR4 type PCB.
>
> Steve.
> Barthi das wrote:
> > Hi,
> >
> > What is the effect of temperature (200C) on
> characteristic impedance at DDR3/4 speeds and what the best
> way to control the impedance because of the temp effect?
> Appreciate if anyone sends the
> literature related to the topic
> >
> > Thanks
> > Barthi
> >
> >
> >
> >
> >
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