Return-Path: Received: (qmail 11362 invoked from network); 3 Jun 2003 08:22:04 -0000 Content-Transfer-Encoding: 8bit Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 3 Jun 2003 08:22:04 -0000 X-Priority: 3 Received: (qmail 3033 invoked by uid 10001); 3 Jun 2003 08:22:04 -0000 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by netmail02.services.quay.plus.net with SMTP; 3 Jun 2003 08:22:04 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19N72F-0000tx-34 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 03 Jun 2003 09:20:47 +0100 Received: from [134.58.240.42] (helo=rusty.kulnet.kuleuven.ac.be) by post.thorcom.com with esmtp (Exim 4.14) id 19N72A-0000to-PS for rsgb_lf_group@blacksheep.org; Tue, 03 Jun 2003 09:20:42 +0100 Received: from localhost (localhost [127.0.0.1]) by rusty.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 703821D735D for ; Tue, 3 Jun 2003 10:20:12 +0200 (CEST) Received: from antonius.kulnet.kuleuven.ac.be (antonius.kulnet.kuleuven.ac.be [134.58.240.73]) by rusty.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 233201D733A for ; Tue, 3 Jun 2003 10:20:10 +0200 (CEST) Received: from dell-rik.fys.kuleuven.ac.be (pc-10-33-165-177.fys.kuleuven.ac.be [10.33.165.177]) by antonius.kulnet.kuleuven.ac.be (Postfix) with ESMTP id EB0DD4C0D0 for ; Tue, 3 Jun 2003 10:20:09 +0200 (CEST) Message-ID: <5.1.0.14.0.20030603101505.00b6fe48@u0019445.kuleuven.be> X-Sender: u0019445@u0019445.kuleuven.be X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Tue, 03 Jun 2003 10:22:27 +0200 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" In-reply-to: <01C329AC.912C7730.g4jnt@thersgb.net> MIME-Version: 1.0 X-Virus-Scanned: by KULeuven Antivirus Cluster Subject: Re: LF: RE: 4060 Divider Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Status: No, hits=-9.8 required=5.0tests=EMAIL_ATTRIBUTION,IN_REP_TOversion=2.53 X-Spam-Checker-Version: SpamAssassin 2.53 (1.174.2.15-2003-03-30-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false I used a 74AHC74 running at 6V up to 200MHz. The first one ran hot and died after some days, I replaced it and glued a small heatsink on top of it. This one is still alive (for 2 years now, fingers crossed). The 74AHC74 can be used as a divide-by-4 , normal 74HC or 74HCT dividers can take over from there. 73, Rik ON7YD PS : trying to push my luck I did run a 74AHC74 at 7V : that worked up to 230MHz but even with a heatsink the IC died after some minutes. At 08:46 3/06/2003 +0100, you wrote: >I sucessfully use 74HC and 74HCT familty to at least 30 - 40MHz. It can >often >be pushed to just above 50MHz. If you want to got faster, the 74ACT >family can >be used as buffers to beyond 100MHz, but counters and shift registers in that >technology don't seem to go much beyond 80MHz in my experience > >Andy g4JNT > > >-----Original Message----- >From: Steve McDonald [SMTP:jsm@gulfislands.com] >Sent: 2003/06/02 19:18 >To: rsgb_lf_group@blacksheep.org >Subject: LF: 4060 Divider > >I would like to use the M74HC4060 as a 'divide-by-64' signal source. Can >anyone tell me the upper limit for xtals that this chip can handle? My xtal >will be on 8.750000; I fear that the upper limit may be around 4-6 MHz? > >Steve > > >Visit the "THE VE7SL RADIO NOTEBOOK" at http://www.imagenisp.ca/jsm >[L.F. Loop] [Tuna Tin DX] [H.F. Maritime DX] [Crystal Radio DXing] [136 kHz >Band]