Electronics Forum | Tue Sep 14 13:49:14 EDT 1999 | Earl Moon
| I am looking to find a formula to calculate the resistance of circuit traces based on width | The old MIL-STD-275 became IPC-STD-275 became IPC-2221/2222. Anyway, they had/have simple graphic representations converting AWG standards into equivalen
Electronics Forum | Fri Aug 08 12:52:57 EDT 2003 | davef
So, if you give your customers design guidelines and one their products causes a cataclysmic explosion, resulting in the deaths and disfigurement of many handicaped third-world children, could a lawyer consider you responsible? Spec Fir Tree General
Electronics Forum | Wed Oct 29 20:28:59 EST 2003 | davef
The possibilities are dizzying, aren't they? In our dingy fog, if we don't understand your requirement, say so. 3 Spec Fir Tree General Technical Specification 3a Design/Layout: IPC-2221 IPC-2222 3b PCB Fab: IPC-6011 IPC-6012 IP
Electronics Forum | Wed Jul 06 13:22:25 EDT 2005 | Dreamsniper
Can anyone help me on where to find reference for the above info other than IPC2221 as it is not covered by the said standard. I am looking for a proper trace spacing for my lightning protection circuit on my PCB for the following requirements: 750
Electronics Forum | Wed Jul 06 13:22:48 EDT 2005 | Dreamsniper
Can anyone help me on where to find reference for the above info other than IPC2221 as it is not covered by the said standard. I am looking for a proper trace spacing for my lightning protection circuit on my PCB for the following requirements: 750
Electronics Forum | Wed Feb 04 06:26:20 EST 2009 | sachu_70
Hi Peter, The defect you observe during the second side reflow could be caused due to improper Au plating thickness in the PCB fabrication process. You can refer IPC-2221 wherein plating thicknes for ENIG mentions 0.08um to 0.23um for Immersion Gold,
Electronics Forum | Wed Apr 18 08:57:45 EDT 2018 | davef
Here is the IPC Standards Tree [ http://www.ipc.org/4.0_Knowledge/4.1_Standards/SpecTree.pdf ]. The design standards that you ask about are over on the right side. I'd guess that the following standards would be a good starting point: * IPC-2221, "
Electronics Forum | Thu Dec 05 02:15:12 EST 2019 | sssamw
IPC 2221B mentions a minimum clearance of 0.5 mm between adjacent holes. A drill-to-drill spacing of 20 mils is a standard value in manufacturer design rules. For small annular rings and pad-to-pad clearance, the minimum via distance is often defin
Electronics Forum | Tue May 29 20:22:19 EDT 2001 | davef
Well, no fault with your calculations from here. They appear to be correct. [Logic doesn't appear to be off to far off base, either. An epiphany, eh?] As mentioned in an earlier posting on this thread, consider following the recommendations of IP
Electronics Forum | Thu Dec 24 13:47:48 EST 1998 | Earl Moon
| Hello everybody: | somebody know about the formula to calculate the span for a particular component thougth hole, or an specific place where I can find this information. I have been looking at IPC manuals but I didn't find anything. | | any advise
