Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3CA953800008A; Fri, 3 May 2013 08:24:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1UYEz2-0000Nh-D1 for rs_out_1@blacksheep.org; Fri, 03 May 2013 13:21:04 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1UYEz1-0000NY-Rx for rsgb_lf_group@blacksheep.org; Fri, 03 May 2013 13:21:03 +0100 Received: from smtpout5.wanadoo.co.uk ([80.12.242.80] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1UYEyw-0003Tm-8K for rsgb_lf_group@blacksheep.org; Fri, 03 May 2013 13:21:02 +0100 Received: from AGB ([2.26.47.195]) by mwinf5d65 with ME id XQLV1l0054CgPKW03QLVzE; Fri, 03 May 2013 14:20:33 +0200 Message-ID: From: "Graham" To: References: <07C35397E99A4E36ACAD6EECB24B07D3@gnat> In-Reply-To: Date: Fri, 3 May 2013 13:20:28 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Alan, Yes , had a better look on the web last night, actually found the data sheet amongst the advert links , its the last in the 5 MHz to 500 Hz fixed reference divider chain , no fan out or in , so as long as the spares 'work , should solve the problem ..or at least moves the process on one stage ... [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.80 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 3f12a6171cff302119f724e64afab799 Subject: Re: LF: Re: 74LS196N 74S196N Difference ?? L or LS Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01CE4800.FAE11D20" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d404e5183ac6e4b3d X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : temperror This is a multi-part message in MIME format. ------=_NextPart_000_0033_01CE4800.FAE11D20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Alan, Yes , had a better look on the web last night, actually found the = data sheet amongst the advert links , its the last in the 5 MHz = to 500 Hz fixed reference divider chain , no fan out or in , = so as long as the spares 'work , should solve the problem ..or at = least moves the process on one stage ...=20 Tnx-73-G.. From: Alan Melia=20 Sent: Friday, May 03, 2013 1:24 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Re: 74LS196N 74S196N Difference ?? L or LS Hi Graham yes ,in that situation I would say that's probably ok. It = sounds like the A stage FF has died. There is probably more drive = available from the "S" version. It will load the driving stage a bit = more heavilly but you probably do not have a high fan-out. i.e.the stage = driving the 196 is only driving the 196? or maybe one other gate input? Alan=20 ----- Original Message -----=20 From: Graham=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Friday, May 03, 2013 12:43 AM Subject: Re: LF: Re: 74LS196N 74S196N Difference ?? L or LS Tnx Allan Yes that makes sense , the chip that's decided to double the = frequency to the phase comparator from 500 Hz sq wave to 1 = Khz 1:5 pulse train ...... thereby ending the gb4fpr 472.5 = session ....... is a 74LS196N =20 I have have a few 74S196N in the spares box , should be ok = as replacement ? 73 -G. From: Alan Melia=20 Sent: Thursday, May 02, 2013 11:13 PM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: Re: 74LS196N 74S196N Difference ?? L or LS The S is fast schottky logic and will pull more current per chip than = LS or TTL and will probably be slightly faster (I think without getting = the spec sheets out) LS draws less current than standard TTL but is as = fast or in some cases slightly faster. The functionality is of cource = exactly the same. LS will probably replace any standard TTL logic though = it depends on the quality of the design to be sure that you dont get = timing or race problems. Alan G3NYK=20 ----- Original Message -----=20 From: Graham=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, May 02, 2013 10:45 PM Subject: LF: 74LS196N 74S196N Difference ?? L or LS 74LS196N 74S196N Difference ?? L or LS divider chip=20 What is the difference anyone ?? Tnx -G. ------=_NextPart_000_0033_01CE4800.FAE11D20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Alan,
 
Yes , had a better  look on the  web  last  = night,=20 actually  found the  data  sheet amongst the  advert = links=20   ,  its the  last  in the   5 MHz = to  500=20 Hz  fixed reference   divider    chain , = no  fan=20 out  or  in , so  as long as the  spares  = 'work  ,=20 should  solve the  problem ..or at least  moves the  = process  on one stage ...
 
 
Tnx-73-G..
 
 
 

From: Alan Melia
Sent: Friday, May 03, 2013 1:24 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: Re: 74LS196N 74S196N Difference ?? L or=20 LS

Hi Graham yes ,in that situation I = would say that's=20 probably ok. It sounds like the A stage FF has died. There is probably = more=20 drive available from the "S" version. It will load the driving stage a = bit more=20 heavilly but you probably do not have a high fan-out. i.e.the stage = driving the=20 196 is only driving the 196? or maybe one other gate input?
 
Alan 
----- Original Message -----
From:=20 Graham
Sent: Friday, May 03, 2013 = 12:43 AM
Subject: Re: LF: Re: 74LS196N = 74S196N=20 Difference ?? L or LS

Tnx Allan
 
Yes that  makes sense  ,  the  chip = that's =20 decided  to   double the  frequency to the  = phase=20 comparator   from   500  Hz    = sq =20 wave to   1 Khz   1:5  pulse train  = ......=20 thereby    ending  the   = gb4fpr  =20 472.5  session  .......   is  a  = 74LS196N =20
 
I have  have  a few  =20 74S196N   in = the   spares box=20 , should  be ok  as  replacement ?
 
73 -G.

From: Alan Melia
Sent: Thursday, May 02, 2013 11:13 PM
Subject: LF: Re: 74LS196N 74S196N Difference ?? L or=20 LS

The S is fast schottky logic and will = pull more=20 current per chip than LS or TTL and will probably be slightly = faster (I=20 think without getting the spec sheets out)  LS draws less current = than=20 standard TTL but is as fast or in some cases slightly faster. The=20 functionality is of cource exactly the same. LS will probably replace = any=20 standard TTL logic though it depends on the quality of the design to = be sure=20 that you dont get timing or race problems.
 
Alan
G3NYK 
----- Original Message -----
From:=20 Graham
To: rsgb_lf_group@blacksheep.org= =20
Sent: Thursday, May 02, 2013 = 10:45=20 PM
Subject: LF: 74LS196N 74S196N = Difference ?? L or LS

74LS196N    74S196N  Difference  ?? L = or =20 LS     divider   chip
 
What is the  difference  anyone  ??
 
 
 
Tnx -G.
 
  
------=_NextPart_000_0033_01CE4800.FAE11D20--