Ë id <DM1JB99N>; Mon, 26 Jan 2004 10:16:38 +0500 Message-ID: <4DAA764A109C4340927A33CD019828611084E8@xxxxxxxxxxxx> From: Tayyab Jamil <tayyab@xxxxxxxxxxxxxx> To: swldstn@xxxxxxxxxxxx, scott@xxxxxxxxxxxxx, Chris.Cheng@xxxxxxxxxxxx Cc: 'steve weir' <weirsp@xxxxxxxxxx>, epriest@xxxxxxxxxxxxxxxxxxx, silist <si-list@xxxxxxxxxxxxx> Subject: Distribution/Filtering/Decoupling Guide, 0.8mm BGA, to be used or not? Date: Mon, 26 Jan 2004 10:16:37 +0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C3E3CB.927911A0" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C3E3CB.927911A0 Content-Type: text/plain; charset="iso-8859-1" Hello, I am required to layout a board with a 0.8 mm pin pitch 532 pin package of a DSP, signal rise time is 2 ns. So I am much more interested in knowing if thre is any thing regarding the problems, suggestions, advice or any body's personal experience using such a small and high pin count package. Regards Tayyab -----Original Message----- From: Steven M. Waldstein [mailto:swldstn@xxxxxxxxxxxx] Sent: Saturday, January 17, 2004 8:48 AM To: scott@xxxxxxxxxxxxx; Chris.Cheng@xxxxxxxxxxxx Cc: 'steve weir'; epriest@xxxxxxxxxxxxxxxxxxx; silist Subject: [SI-LIST] Re: [SI-LIST]: Distribution/Filtering/Decoupling Gu ide The 100Mhz clean cut off. To all, Does anyone have a reference to a paper that compares the issues of 1.27mm vs 1.0mm BGA pitch from the point of view of electrical performance? I've been fighting a losing battle over this because the 1mm packages are cheaper ( due to the substrate size ). Does anyone have any analysis they are willing to share or a a description of simulations and tools necessary to create results that show the problems with 1mm and soon 0.8mm packages? Any ammunition in this battle is helpfull. Steve swldstn@xxxxxxxxxxxx - ------_=_NextPart_001_01C3E3CB.927911A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Diso-8859-1"> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version = 5.5.2653.12"> <TITLE>Distribution/Filtering/Decoupling Guide, 0.8mm BGA, to be used = or not?</TITLE> </HEAD> <BODY> <P><FONT SIZE=3D2>Hello,</FONT> </P> <P><FONT SIZE=3D2>I am required to layout a board with a 0.8 mm pin = pitch 532 pin package of a DSP, signal rise time is 2 ns.</FONT> </P> <P><FONT SIZE=3D2>So I am much more interested in knowing if thre is = any thing regarding the problems, suggestions, advice or any body's = personal experience using such a small and high pin count = package.</FONT></P> <P><FONT SIZE=3D2>Regards</FONT> <BR><FONT SIZE=3D2>Tayyab</FONT> <BR><FONT SIZE=3D2> </FONT> </P> <P><FONT SIZE=3D2>-----Original Message-----</FONT> <BR><FONT SIZE=3D2>From: Steven M. Waldstein [<A = HREF=3D"mailto:swldstn@xxxxxxxxxxxx";>mailto:swldstn@xxxxxxxxxxxx</A>]</F= ONT> <BR><FONT SIZE=3D2>Sent: Saturday, January 17, 2004 8:48 AM</FONT> <BR><FONT SIZE=3D2>To: scott@xxxxxxxxxxxxx; = Chris.Cheng@xxxxxxxxxxxx</FONT> <BR><FONT SIZE=3D2>Cc: 'steve weir'; epriest@xxxxxxxxxxxxxxxxxxx; = silist</FONT> <BR><FONT SIZE=3D2>Subject: [SI-LIST] Re: [SI-LIST]: = Distribution/Filtering/Decoupling Gu</FONT> <BR><FONT SIZE=3D2>ide The 100Mhz clean cut off.</FONT> </P> <BR> <P><FONT SIZE=3D2>To all,</FONT> </P> <P><FONT SIZE=3D2>Does anyone have a reference to a paper that compares = the issues</FONT> <BR><FONT SIZE=3D2>of 1.27mm vs 1.0mm BGA pitch from the point of view = of electrical</FONT> <BR><FONT SIZE=3D2>performance? I've been fighting a losing battle over = this because</FONT> <BR><FONT SIZE=3D2>the 1mm packages are cheaper ( due to the substrate = size ).</FONT> </P> <P><FONT SIZE=3D2>Does anyone have any analysis they are willing to = share or a</FONT> <BR><FONT SIZE=3D2>a description of simulations and tools necessary to = create results</FONT> <BR><FONT SIZE=3D2>that show the problems with 1mm and soon 0.8mm = packages?</FONT> </P> <P><FONT SIZE=3D2>Any ammunition in this battle is helpfull.</FONT> </P> <P><FONT SIZE=3D2>Steve</FONT> <BR><FONT SIZE=3D2>swldstn@xxxxxxxxxxxx</FONT> </P> <P><FONT SIZE=3D2>-</FONT> <BR><FONT SIZE=3D2> </FONT> </P> </BODY> </HTML> ------_=_NextPart_001_01C3E3CB.927911A0-- ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu