X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-Envelope-From: paubert AT iram DOT es Date: Mon, 29 Jun 2015 09:06:33 +0200 From: "Gabriel Paubert (paubert AT iram DOT es)" To: "Dave McGuire (mcguire AT neurotica DOT com)" Subject: Re: [geda-user] PCB footprint for rectangular QFN? Message-ID: <20150629070633.GA7678@visitor2.iram.es> References: <558F8A49 DOT 5040002 AT neurotica DOT com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <558F8A49.5040002@neurotica.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Spamina-Bogosity: Unsure X-Spamina-Spam-Score: -1.0 (-) X-Spamina-Spam-Report: Content analysis details: (-1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: neurotica.com] -0.0 BAYES_20 BODY: Bayes spam probability is 5 to 20% [score: 0.1622] Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk Hi, On Sun, Jun 28, 2015 at 01:46:49AM -0400, Dave McGuire (mcguire AT neurotica DOT com) wrote: > > Hey folks! I'm thinking of using Linear Technology's LTC4099 chip > which comes in a rectangular 20-pad QFN, with four pads on two sides and > six pads on the other two. > > Has anyone done up a footprint for this somewhat unusual package? Not me, but I used gfootgen to get the starting point for Linear Technology's LTC6950, which comes in a 48 pin rectangular QFN (16 pads on the long sides, 8 no the short ones). I had to add the center pad by hand in an editor, however. Gabriel