RE: [SI-LIST] : Signal Polarities

tomda (tom_dagostino@mentorg.com)
Thu, 22 Apr 1999 10:32:33 -0700

Unless of course you want to wire OR some of the signals together then an
active low with open drain (collector) outputs work best.

Tom Dagostino

-----Original Message-----
From: D. C. Sessions [SMTP:dc.sessions@vlsi.com]
Sent: Thursday, April 22, 1999 8:39 AM
To: si-list@silab.eng.sun.com
Subject: Re: [SI-LIST] : Signal Polarities

Kassem Abdallah wrote:
>
> Hi All,
>
> I wonder if someone can briefly illustrate the pros and cons of using
> Active low signals versus Active High signals.
> - Form both views: a chip design and a board level design
> - From the Drivers technology selection.
> - From a Connection view:
> (a) in case of a piont to point connection.
> (b) multi-node connection.

Since you need to be able to transition in both directions,
there is no difference whatsoever.

--
D. C. Sessions
dc.sessions@vlsi.com

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