[SI-LIST] Re: Can we drive 100Mhz SSTL_18 with standard ALVC or other 1.8V logic
- From: steve weir <weirsi@xxxxxxxxxx>
- To: jswarrier@xxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Wed, 22 Feb 2006 01:13:15 -0800
Jai, at such a low bit rate, I think a well terminated channel should
work fine. If you can't simulate, build a small test vehicle.
Steve.
At 11:38 PM 2/21/2006, Jai Shanker wrote:
>Hi All,
>
>For a low-cost implementation we are looking to drive
>SSTL_18 receivers on our chip with standard 1.8V
>single -ended logic for a 100Mhz clock.
>
>I have usually used LVPECL for this type of
>application.
>
>I checked it should be OK to drive 1.8V levels to the
>SSTL_18 inputs. The remaining question is about the
>speed / drive performance of the standard logic.
>
>Can I use ALVC244 / 245 type of buffers? They have ~
>6mA symmetric current drive.
>
>They dont spec any fMAX or Max data rate info. There
>is such info on some TI devices (SN74AVC8T245,
> >170Mbps @ 1.8V operation) but they spec a load of
>15pF+ 2K. The ALVC buffer specs its load at 30pF+500
>ohms. So would they be comparable.
>
>I have downloaded some IBIS models of the buffers but
>I dont have easy access to any simulation tool.
>
>Has anybody done this or anything similar.
>
>Thanks for any help,
>Jai Warrier
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam? Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>//www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List FAQ wiki page is located at:
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
>List technical documents are available at:
> http://www.si-list.org
>
>List archives are viewable at:
> //www.freelists.org/archives/si-list
>or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
>Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
