[SI-LIST] Re: what's the SSTL criterion?
- From: steve weir <weirsp@xxxxxxxxxx>
- To: meng.yubao@xxxxxxxxxx, si-list@xxxxxxxxxxxxx,si-list-bounce@xxxxxxxxxxxxx
- Date: Tue, 20 Apr 2004 23:31:47 -0700
Meng, your best bet is to download the specification from JEDEC. In a
nutshell, SSTL switches in a narrow range centered about Vddq /
2. Combined series and parallel terminations may restrict the swing about
that center threshold voltage.
Steve.
At 11:23 AM 4/21/2004 +0800, meng.yubao@xxxxxxxxxx wrote:
>hello all
> Can anyone tell me the theory of the SSTL voltage level, I have a DDR
>RAM design with SSTL voltage level, but I am not familiar with it, what's
>the difference between the SSTL and the GTL or TTL, Can anyone give me
>some clue or material about the SSTL, thanks a lot.
>best regards
>meng yubao
>
>
>
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Steve Weir
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com
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