The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: email@example.com (carltons)
Subject: Re: Urgent: 3.3V CMOS output to 2.8V CMOS input
User-Agent: NewsWatcher-X 2.2.3b2
NNTP-Posting-Date: Sat, 21 Dec 2002 01:39:57 GMT
Date: Sat, 21 Dec 2002 01:39:57 GMT
In article ,
firstname.lastname@example.org (Sugapes) wrote:
> Jim Thompson wrote in message
> > Use reasonable value resistors so you don't have a current problem.
> > Then parallel each with capacitance (like you were tuning up your own
> > 'scope probe). Be sure to include the input capacitance of the 2.8V
> > device in your estimation.
> > ...Jim Thompson
> I'm sorry, but I don't understand your suggestion. Where you implying
> using a resistive divisor with capacitances in paralel with the
> resistors? I can't already afford the current requirenments of the
> resistive divisor, for the maximum time constant (RC) tolerable. How
> will the parallel capacitances help (I think they only would worsen
> the RC)?
> Please clarify!
> Thank you!
If you're looking for 20 MHz speeds, use voltage tolerant devices at 2.8
as an interface to your device. Look in the books, they're there.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup