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Hi to all,
this is the first time for me,to consider SI issues.
What's the correct flow to take in this case ?
I think :
1) Define stackUP with the supplier
2) Define PCB Impedence (but I don't know the right value 50?...70? how I decide it ?)
3) calculate the right width trace for each layer...
Hi to all,
somebody know the last version of IDF file ? I mean... I know that there's a version 3 that "give" to the solid cad only 1 hight information for component,but I heard that there is a version 4.0 that give more hight information,isn't it ?
Somebody know about that ???
best pcb saftware
Like many people said the cost is fondamental for chosing the pcb cad.
Medium cost : Eagle - Pulsonix
Medium-Hi: PADS - Cadstar
Hi-Very Hi: Mentor - Cadence - Zuken CR5000
otherwise if you need only a free software you could see Eagle or ZenitPCB (is an italien product but the...
I have Mentor Expedition.There are several version...
e.g. on top
Pinnacle : Schematic+pcb+HS - I suppose ~35k
Ascent LX : pcb full layer + schematic ??? no HS
Ascent L4 : NO schematic and 4 layer pcb + no HS is ~12k
I have the maintenance so I don't know if are old...
situs vs specctra
I'm quite sceptical about signal integrity and Altium....
At the same price I cound suggest you to looking for Zuken Cadstar with
product Silver S (3500pins) or Platinum S (No pins limitation).
IBIS Model-DifferentialPair-Length Route-Order Nets-Shielding tool and so on...
Hi to all,
somebody had soldered on wave process a ssop pitch 0.65mm component, on bottom side ??
I have on production a 0.8mm component wave soldered and the quality of
soldering is good (with a little end pads adjustment).
Re: Zuken or Protel
I'm agree with binu G,
P*otel isn't so good to work faster...and about Hispeed routing there's no comparison
between them !!!!
Altium had a good PCB, P-CAD, but I heard that they'll don't support that enymore, in the future :-(
But depend what you have to do...
Hi to all,
is very hardly to say what kind of software is the best...depend on what you have to do and what's the time that you have !!!!
Many of the PCB reach the target ( a good final pcb ) but not at the same time and not all have so many powerfull features.
If you work in a company that want...
thermal relief pads
usually I make PCB with Hi Current ( 5A to 13A ) and I don't use Thermal Relief
on component pins (Connectors,Relays....)
On production (~ 30.000 pz for year) I seen that the pins howhever had a good solder.
If you need a real 3D (not only a viewer...or little more) you have to try :
www.turbocad.com (quite good and relative low price)
www.solidworks.com (very good but expensive)
www.solidEdge.com (very good but expensive)
or if you have Cadstar directly access to Cadstar 3D tool.
Otherwise if you...
Hi to all,
I'm going to design a new pcb with 4Layer (Top-Pwr-Gnd-Bottom),but
now in this project I have a zone with 220V (Transformer - connectors - ptc .....)
and I don't know if:
• I have to delete all plane in this zone (completely remove internal copper)
• or just respect the constraint...
On Mentor Expedition ,you can decide to force trace to gloss OFF/Partial/ON (F4).
Gloss off means that the trace you are routing can't "move automatically"(means best route and length or push), but only manually move.
If you try to route over a gloss off trace, this trace don't move !!
I don't understand so well what you means...but I try to answer you.
At the beginning, we have used IPC-SM-782 "Surface Mount Design Land Pattern Standard" that you can find on www.ipc.org, and now we have "fix\adapt" the component pads whit the productive process.
Re: What is the optimum distance between split power planes
about this interesting sentences...
"I read that I should couple those planes with some 100nF capasitors. And the number of the capasitors is recommended half the number of the signals.So I used 4 capasitors from 3.3V to...