88 Threads found on edaboard.com: Capacitor Footprint
I need to create a customized 0402 capacitor footprint(SMD) to use in MentorGraphic Expedition. The recommended size from IPC-SM-782A is too large for me. May I know what is the minimum pad size, pad pitch, solder mask, body outline size etc. that I can use?
Thanks in advance.
PCB Routing Schematic Layout software and Simulation :: 21.03.2005 10:36 :: smithchart :: Replies: 5 :: Views: 2076
yes it is fine, the datasheet shown something like a pad in the center of the capacitor, what is it?
PCB Routing Schematic Layout software and Simulation :: 04.06.2011 19:20 :: alexan_e :: Replies: 8 :: Views: 1592
Anybody got any application note on capacitor selection or an introduction to different type of capacitor ?
Out of the 3 type of dielectric X5R, X7R & CG0 (NP0), which one is the cheapest in term of cost ?
Next, which footprint (0402, 0603, 1210 & etc) is the most common on PCB ?
Thanks a million in advance !
Professional Hardware and Electronics Design :: 12.06.2003 20:06 :: ayeong :: Replies: 10 :: Views: 2351
thank you very much guys......:) for adding ipc-7351 as well as smt component jpg
Added after 7 minutes:
I have one doubt.....
capacitor,resistor,inductor all have 0201,0402,0603,1210.....
if we take 0603 for they same at dimensions..????
PCB Routing Schematic Layout software and Simulation :: 09.02.2010 12:11 :: ahsoka :: Replies: 18 :: Views: 21493
thank you for the help Schallhofer.
I found the problem while generating a surface mount footprint for a capacitor. In FPM under Tools-> properties -> Padstack & Pin ->SM Pad ,Fillet was selected,I switched it for normal and all work now FPM don't ask for a shape anymore, look like the fillet pad function need a fix.
With normal pad a
PCB Routing Schematic Layout software and Simulation :: 17.03.2008 23:09 :: thales :: Replies: 160 :: Views: 106397
I want to know the footprint for buffer 74LS244 and capacitor 470uF.
One more thing, when I add the footprint TO218AC for TIP140 and TIP 145, the following error message displayed. "Electrical Package TIP147 for comp Q1 has at least one pin(0) which has no corresponding pin on footprint TO218AC"
What I (...)
PCB Routing Schematic Layout software and Simulation :: 02.12.2008 19:51 :: shereen15 :: Replies: 1 :: Views: 1006
here at my compagnie we use the IPC land pattern naming conventions. Which is very usefull for almost all components. If we need to have more information we simply append this to the standard pattern name.
You can find the document at
a pattern name like CAPC1608X100N means a C
PCB Routing Schematic Layout software and Simulation :: 18.02.2009 07:56 :: senilicus :: Replies: 2 :: Views: 1100
I have a chip capacitor and resistor using 1206 package and I need to know the footprint dimensions for the same....are there standard dimensions?
RF, Microwave, Antennas and Optics :: 05.05.2009 12:38 :: rfndmw :: Replies: 2 :: Views: 1160
what is the difference between an electrolytic capacitor and a non-electrolytic capacitor and how they effect a circuit when they are used?
Electronic Elementary Questions :: 29.07.2009 14:29 :: arajarahul :: Replies: 5 :: Views: 6438
I would like to ask anyone out there on how to draw footprint of discrete component (both axial and chip type) using microwave office.
For your info, I'm designing a circuit consisting discrete elements such as transistor, resistor and capacitor. I'm not really sure how to draw the footprint using MWO. I have all the dimensions (...)
RF, Microwave, Antennas and Optics :: 06.10.2010 10:54 :: kellyza :: Replies: 10 :: Views: 1286
Many years ago I did a similar thing with capacitors.
How does it appear in the schematic symbol? I would expect 4 pin numbers (if display is activated) for one capacitor terminal.
It's similar with the below shown part, that represents a through hole or SMD capacitor as assembly variants. Pin numbers are normally hidden. Pin wir
PCB Routing Schematic Layout software and Simulation :: 14.09.2011 10:16 :: FvM :: Replies: 17 :: Views: 1421
I?m changing my status from an interested reader to an interested writer, because I haven?t found an answer to my question about creating a component (footprint). I hope I can learn from your experience?
I do have a datasheet (let?s say it is a capacitor or something) and all of the dimensions are in mm (for e
PCB Routing Schematic Layout software and Simulation :: 31.08.2012 08:56 :: chaki :: Replies: 9 :: Views: 294
Hi, I want a suitable footprint for SMD electrolytic capacitor 470uF/25V and 1000uF for Altium, but can't find any thing. please help me to find it.
PCB Routing Schematic Layout software and Simulation :: 05.03.2013 13:09 :: rezaf :: Replies: 3 :: Views: 203
Hi, I want a suitable footprint for SMD electrolytic capacitor 470uF/25V and 1000uF for Altium, but can't find any thing. please help me to find it.
Can I use "Chip_capacitor_L or M or N" library ?
The biggest obstacle that lowers speed of board design is to find an appropriate footprint and library for board's components. (...)
PCB Routing Schematic Layout software and Simulation :: 06.03.2013 12:50 :: rezaf :: Replies: 0 :: Views: 8
somebody knows how to get a working net file out of MicroCAP6 to Protel, I can get the package editor to connect to the the componet eg. Resistor, capacitor etc. ?? It say missing package even I put a (package)statement in the compn.
Professional Hardware and Electronics Design :: 03.05.2001 22:30 :: viahole :: Replies: 5 :: Views: 3573
here are few links:
Professional Hardware and Electronics Design :: 16.03.2002 22:40 :: BENOIT :: Replies: 12 :: Views: 5083
here are some links: Datasheets by Prefix
KELL's ELECTRONICs @ WEB GUIDE
Various CDROMs datasheets See index at
Electronic Component Distributor Anglia
Professional Hardware and Electronics Design :: 01.05.2002 18:58 :: BENOIT :: Replies: 18 :: Views: 8004
Thanks ted. your replies to my questions have been very useful.
What should be the terminating point for a particular section ground return path? Should it be the filter capacitor?
PCB Routing Schematic Layout software and Simulation :: 07.02.2003 12:20 :: bimbla :: Replies: 6 :: Views: 2132
tKeepout doesn't contain the package's outline. This is only the top restricted area for the autorouter, i think.
Of course it's no good idea to output this in the CAM job.
For the capacitor from the rcl library, the outline is drawn on the tDocu layer (very small, but it's there).
But for other libraries (e.g. that SO-chip in the picture) the o
PCB Routing Schematic Layout software and Simulation :: 28.03.2005 23:56 :: M!k :: Replies: 673 :: Views: 151749
it's said that the coilcraft model is not a global type. see Q&A list below from coilcraft. I am afraid for different type of devices (note: capacitor model is not avaiable in coilcraft), so we need to build our own spice model.Maybe the most important problem is how to choose the model type.
Q: Why do
Analog Circuit Design :: 16.04.2004 02:11 :: syncmaster :: Replies: 2 :: Views: 1664
I get the voltage at the C10 pins, the voltage is positive. So, the capacitor's polarity is right on my schematic. I get #8,35V at C10's pins.
Have a good day.
Microcontrollers :: 23.11.2004 21:19 :: crazyduck :: Replies: 187 :: Views: 96503
Firstly, sorry for the long post. It's not meant to be a rant - just a collection of my opinions which may be useful or stimulate discussion.
Man, there's nothing perfect out there. Everything has it's flaws. It's a real pain trying to work out what's best for any one person. I'm just going through th same pain but at a lower price point (spendi
PCB Routing Schematic Layout software and Simulation :: 12.01.2006 00:35 :: nat-b :: Replies: 132 :: Views: 29096
I'm using a max 232 from maxim, it need 10uF polarized capacitors, is any problem to use tantalio capacitors? or I need to use electrolitic capacitors.
Thanks and best regards
Hobby Circuits and Small Projects Problems :: 24.07.2004 00:32 :: bomba :: Replies: 14 :: Views: 4542
Have you ever mounted a tiny capacitor 0.3mm x 0.5mm on a circuit board ?
What (cheap) tools would I need to do that ?
PCB Routing Schematic Layout software and Simulation :: 01.06.2006 00:08 :: costox :: Replies: 33 :: Views: 14104
Let's start with drill bit size - that is the size of the drill that the PCB fabricator uses to drill holes in the PCB for mounting holes, vias, and thru-hole pads. They come in standard sizes, so you can't specify just any hole size and expect the fabricator to be able to make it - the hole has to match the available drill sizes.
If you are sp
PCB Routing Schematic Layout software and Simulation :: 06.11.2004 18:28 :: House_Cat :: Replies: 6 :: Views: 1580
FTDI just released a new USB chip FT232RL that requires no external components, so design significantly simplified.
Removed: Crystal, 7 resistors, 3 capacitors, EEPROM chip and transistor.
I need some time to clean up design before I can post it.
Microcontrollers :: 09.02.2006 01:01 :: Andy_123 :: Replies: 226 :: Views: 133451
hi all,i design a LNA ,after finish layout i put
footprint of amplifier as in datasheet,as u see in the picture,is
these modification change the s par.simulation,althougth i put them
after t.l. simulated(i put it random) that i know these elements reduce
coupling capacitor between the amplifier pins
pls for who design a real amp.
help me p
RF, Microwave, Antennas and Optics :: 04.12.2004 05:18 :: abdoeng :: Replies: 4 :: Views: 530
You selected not to pour over existing ground when you did the polygon pour. The result is isolation of the signal return path on the pour, so it has very little beneficial effect. All you did was float a ground around the existing ground traces.
I suggest that you let the copper pour carry the signal returns between chips instead of forcing
PCB Routing Schematic Layout software and Simulation :: 27.03.2005 00:53 :: House_Cat :: Replies: 10 :: Views: 1258
There are many rules of thumb,
Essentially, First, you have to make a proper plan about the priority of signal
routing.Second, proper planning of placement. Third, Inspect important aspect
of Isolation ( loop filters, TX/RX high energy signal trace..), grounding(PA for thermal, SAW for ground return current which affect out-band isolation much),
RF, Microwave, Antennas and Optics :: 01.07.2005 08:24 :: Wilson_yu_chen :: Replies: 6 :: Views: 706
I need to design a rigid pcb that will have a silcon die wirebonded to it and then take the signals out of this board using a flex cable to a 4in x 4in 4-layer rigid FR4 board (I have already designed this big board and laid out except for the signals coming in from the flex cable). at the bigger board end I intend to have a ZIF connector for the
PCB Routing Schematic Layout software and Simulation :: 04.08.2005 18:09 :: circuit :: Replies: 4 :: Views: 2692
Usually the working limit of a capacitor is SRF (Series Resonant Frequency). Before that point the reactance of the capacitor is pure capacitive, and after SRF the reactance is inductive.
In some particular applications capacitors are used only at SRF where the equivalent impedance is minimum.
RF, Microwave, Antennas and Optics :: 09.11.2005 11:13 :: vfone :: Replies: 4 :: Views: 726
I have build one ICD PICS rev.B.
My problem is that MPLAB doesn't connect on it. When i try to connect mplab shows "Connecting to MPLAB ICD 2" , the progress bar moves but it stays there forever, only when i disconnect the icd2 it stops with a failed message.
The USB driver is installed correctly and i can see the programmer under the
Microcontrollers :: 06.02.2008 11:10 :: Leosedf :: Replies: 1853 :: Views: 469145
There isn't a special symbol for a ferrite bead, it's just an inductor. The PCB footprint will depend on what type of bead you choose to use. There is a footprint library for "Chip Inductors" that contains various size surface mount footprints. A thru-hole inductor would use the same footprint as a thru-hole resistor or (...)
Professional Hardware and Electronics Design :: 04.04.2006 07:46 :: House_Cat :: Replies: 3 :: Views: 3335
For estimating pad capacitance you can just use the parallel-plate capacitor formula. Just add this into your simulation (toggle on and off) to see how much the circuit is affected. As frequencies go higher then this is more of a transmission line effect. To truly capture almost all the effects you must use microwave-design techniques where ever
RF, Microwave, Antennas and Optics :: 08.05.2006 18:36 :: madengr :: Replies: 7 :: Views: 1364
Why on earth would you put sim IO signal lines to ground with capacitor (c43,c40,c41) ? That will short sim lines to ground. The power supply for modem is wrong, you should have low esr capacitors to gnd at that point (at least 100uF). PWR key is not driven corectly, you should use a bipolar or mosfet transistor to drive it, not directly. Using the
Professional Hardware and Electronics Design :: 03.06.2009 07:53 :: pisoiu :: Replies: 178 :: Views: 71497
This is from ramesh.I am using orcad software for schematic entry. i faced this following problem.
The used capacitor does have wrong properties(Eg: Manu Part i created my own new library.And i replaced the that component's cache in schematic with preserved properties(if i do replace properties, the reference number i
PCB Routing Schematic Layout software and Simulation :: 27.06.2006 14:58 :: nramesh :: Replies: 2 :: Views: 4386
I use OrCAD to make PCB layout, and i have a quesion about that.. anyone that uses anyother tool for layout may have usefull answer...
What is the foot print (pad) that's used for surface mount capacitors or resistors? Should I creat it from scratch, or it's available in one library in OrCAD? i
PCB Routing Schematic Layout software and Simulation :: 10.07.2006 05:08 :: ahmad_abdulghany :: Replies: 3 :: Views: 1352
Altium is using the IPC-7351 standard for their new footprints. That standard requires metric dimensions in the names of components, so the names of surface mount resistors and capacitors have changed to reflect that requirement. You can still list the alternate English uint name as a parameter that will show up in a bill of materials. Use the p
PCB Routing Schematic Layout software and Simulation :: 30.10.2006 20:17 :: House_Cat :: Replies: 2 :: Views: 4521
it can be consider as a parellel capacitor to ground, and the value my be between 100 ~ 600f, depend on the pad structure.
btw: you can get the detail information from your foundary, such as TSMC et al.
RF, Microwave, Antennas and Optics :: 14.06.2007 13:22 :: jinhaozi :: Replies: 4 :: Views: 904
Downstream Technologies is a Mentor Graphics "Open Door" Partner Company. Mentor doesn't own them, but they have an agreement to make CAM350 and Blueprint easy to work with from PADS. There is builtin translation software to allow CAM350 and Blueprint to translate Mentor EDA formats.
The CAM output of your PCB is how your boards are made. It
PCB Routing Schematic Layout software and Simulation :: 02.12.2007 23:46 :: House_Cat :: Replies: 133 :: Views: 27653
i'm new on this list and i hope you will understand my bad english :-)
I have a Packard Bell ALP-AJAX GN laptop whit (at least) two burned components around the supply area connector.
I would like to replace the broken components.
The chip is 8C630. Probably a supply regulator (i can't find datasheet on interne
Service Manuals, Requests, Repair Tips :: 10.11.2009 06:13 :: baraka42 :: Replies: 192 :: Views: 78582
Dude, my charger did not work yet.
Now I'm using the correct parts like your project except for the 2k5 pot that is not comercial use here in Brazil.
I got one with 3k that measured 2.56k on my DV Fluke 189, I'm using this pot now.
For BC173 I'm using BC549 that is equivalent.
I put a display in the circuit.
Making a correct calibra
Microcontrollers :: 15.12.2007 15:50 :: RenatoBR :: Replies: 187 :: Views: 91680
i learnt orcad- 9 but as i tried a lot i am unable to change ( increase ) the hole size of the peds.
if i select a capacitor, i get the hole size too small and i cant get that pcb through.
( example : --> for cap 100/25.. etc. etc..)
please some one explain me how we can change the hole size please.
thanks in adva
PCB Routing Schematic Layout software and Simulation :: 30.01.2008 17:01 :: ronydc :: Replies: 2 :: Views: 1298
sorry guys i'm a newbie in electronic.
some of the component data sheet din't showing recommended pad so my question as follow:
1. how to get the correct solder pad for smd component.
2. or follow the component lead dimension?
thanks in advance.
For SMD , you won't get pad, you get the footprint of the smd compone
Professional Hardware and Electronics Design :: 10.02.2008 12:02 :: mvs sarma :: Replies: 13 :: Views: 1910
If I have this right, the PWM is driving a relay coil, with one end of the coil to ground? You would need a capacitor across the relay coil and diode between the PWM source and the +12v end of the coil/capacitor. The delay would depend on the size of the capacitor, the resistance of the coil, and the drop-out voltage of the relay. If the (...)
Analog Circuit Design :: 18.02.2008 13:20 :: KMoffett :: Replies: 3 :: Views: 911
I could not see the files you posted, but I wonder what are the through hole discretes replacement mosfets you used instead of smd parts (I tried to find some mosfets with the same specifications of the mosfets used in the PICKIT2 original circuit, but I was not well succeded).
Returning to your problem: maybe your USB port cannot suppl
Microcontrollers :: 22.02.2008 21:02 :: rkodaira :: Replies: 318 :: Views: 59512
What are vias?
Vias are "holes" that are used to connect different layers of a PCB
What do u mean by this? separate traces that switch at high frequencies from others?
Keep HF traces from others that could get noise from them.
How do i prevent ground loops when PCB designing? what problems can happen?
Try to think about the current path th
Electronic Elementary Questions :: 11.03.2008 20:55 :: sunderwood :: Replies: 12 :: Views: 1464
Thanks house Cat. The problem is that the components in question are some 100 decoupling capacitors under my FPGA. These do not have any silk screen outline, just the pads. Because of the small footprint they also don't have any designators (C1, C2 etc). The idea is that since i'm using three types of decoupling capacitors, all with (...)
PCB Routing Schematic Layout software and Simulation :: 18.06.2008 05:14 :: JohnG300c :: Replies: 11 :: Views: 2299
For some reasons MGA-412P8 is a very unstable PA, even if you follow the AVAGO PCB specifications. Especially the bias lines (pin 4 and 6) need critical decoupling and careful ground design.
How do you know that MGA-412P8 is highly unstable?
Please give me guidance for decoupling (capacitor) design or calculation and ground
RF, Microwave, Antennas and Optics :: 27.06.2008 01:50 :: fracosoe :: Replies: 20 :: Views: 5245
Just make sure C1 is non-polarized paper capacitor. When I was in school, I made a mistake of using electrolytic cap and there was a big-boom!! :D
Power Electronics :: 10.07.2009 16:55 :: CMOS :: Replies: 8 :: Views: 3700