Questions tagged [footprint]
Footprints are the CAD representations of the pads (and other physical/mechanical features) of a board-level component.
284
questions
2
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2answers
60 views
OrCAD Footprint in .brd layout different from the .dra file
I made a custom footprint for an 8 pin TSSOP IC, using custom padstacks and creating a new package (no wizard). Each of the four pins on a side are 0.3mm wide and 0.5mm apart (BSC). In the .dra file ...
0
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1answer
34 views
Finding footprints and symbols for common components
I am wanting to use a 5x2 IDC connector in my project which are quite common. Most IDC connectors such as
https://www.digikey.co.nz/en/products/detail/cnc-tech/3020-10-0100-00/3441723
don't have a ...
2
votes
1answer
72 views
KiCad 4 CvPcb: Why does adding a GitHub repo have no effect?
I'm trying to import the NetTie footprint library into CvPcb to implant a net tie into my PCB layout. I added the URL as a global library to the library table, but after clicking OK, I miss anything ...
1
vote
1answer
65 views
Footprint is Driving Me Crazy!
I'm trying to make a footprint for this switch:
https://www.ckswitches.com/media/1910/rm.pdf
They don't list the XY locations of the pins, just that they are 45 degrees apart but with some trouble I ...
0
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0answers
40 views
How do I find this component's footprint?
I have this socket adapter that I need to make a footprint for (the header pin part), but I can't find the mechanical drawing anywhere:
https://www.ebay.com/itm/133771173193?hash=item1f25621d49:g:...
1
vote
3answers
94 views
Which Kicad footprint represents a 2.2 µF MKP audio coupling capacitor?
I'd like to add six rectangular-shaped 2.2 µF MKP capacitors used as coupling caps for an audio circuit to my PCB in Kicad, but I'm not quite sure about the right footprint.
What makes the choice even ...
0
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0answers
31 views
elongated footprint pads for LGA, BGA, QFN packages
Sometimes I need to add more solder in between a capsule and its land patterns, other times I even need to remove some. It would be much easier if the footprint pads were protruding out from ...
1
vote
1answer
68 views
Solder pad with no copper circles inside?
I'm trying to use a ROHM BD9F800MUX (buck PMIC regulator with synchronous regulation.)
Upon looking at their footprint guide, it has something I have not seen before and is poorly documented.
It ...
0
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0answers
35 views
Compatibility of package/footprint names
Whenever I look up footprints and packages of components I am confused by the name, for example:
SOT-23 and SOT-23-6
The 6 seems to stand for the number of pins. But for:
SOT-23 and SOT-23-3
It seems ...
0
votes
1answer
53 views
Footprint dimensions don't add up
The screen capture below was taken from the datasheet for Pulse's PA2369NL
transformer.
However, it doesn't make much sense to me. All measurements are in mm.
Take for example, the separation between ...
0
votes
1answer
65 views
Why does the footprint change when I add it to the schematic?
I am using "FTSH-105-01-L-D-K" in my PCB design. When I check the footprint of this component directly through library, I can see that there is enough clearance between the pads (please ...
2
votes
1answer
70 views
How do I find the center of a part when making a footprint for a component that will be used in a centroid file?
Often the footprint I need is not in the existing libraries and I need to make my own. For example one of the dozens of micro USB footprints.
When I make a footprint and then send for assembly at ...
5
votes
1answer
119 views
Is combined footprint for LQFP and UFQFPN packages a good idea?
We are struggling to source STM32L4Q5CG chips due to global semiconductor shortage. Normally I am using LQFP48 package which allows me to easily rework PCB if necessary. But sometimes UFQFPN chips ...
-1
votes
1answer
34 views
Three different dimensions shown in package drawing, what do they mean?
I have an IC that uses this package from analog devices: https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp_8_5.pdf.
Most of the dimensions are shown in three numbers:
I ...
0
votes
1answer
48 views
KiCad footprint for a diode
How do I determine what kind of footprint is needed for the RBR20NS60A diode? Its datasheet is linked here.
1
vote
1answer
169 views
What are the boundaries around pads in KiCad PcbNew and what are their functions?
I am learning to design PCBs in KiCad. Right now I am using footprints I found online.
In PcbNew I find there is a boundary surrounding each pad. In footprints found in KiCad, these boundaries don't ...
0
votes
1answer
47 views
How to identify pin 1 from mechanical design
Looking at 10142048 datasheet from TE I'm not sure how to identify pin 1 from top side.
At page 9 there are the pin assignments from bottom side only.
Now, I guess:
...
0
votes
1answer
33 views
AC Plug Type F PCB design?
I am designing a smart plug device. I need an ac plug footprint for my design. I will use type F (schuko) plug but I could not find its design files for altium. Can somebody inform me? Thanks in ...
0
votes
1answer
37 views
RF trace matching network component pad sizes
I'm creating an RF connection between a PSoC4 BLE device and the cypress MIFA antenna according to this app note.
I'm confused about the pads that are required by the components used in the RF ...
1
vote
0answers
59 views
Import DXF defined padstacks in to Allegro/Orcad PCB
I'm using Orcad PCB Professional 17.4-2019 S017
I've got a symbol with some funky pads on it, one the padstack editor cannot generate.
Here's where I'm trying to get to. Green is mask boundary, blue ...
0
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0answers
15 views
Altium avoid DRC error coming from footprint that are not errors
This connector has a "placement pin" through its external pad. It leads to this design:
The fact that the pin hole is in the pad leads to a DRC error.
There's also a DRC error for the other ...
0
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0answers
37 views
Looking for a pin-compatible to LT1013DID rail-to-rail in/out op-amp
I have designed a circuit using LT1013DID (SOIC 8 footprint) op-amp and while Spice simulation worked, I forgot about input common-mode voltage limit (which it seems is not simulated) and thus need an ...
0
votes
2answers
28 views
How do I make sure my part matches with the eagle part selected?
I need help matching the part I have with the eagle part.
I'm using a RPX-1.0 data sheet pdf:
https://www.mouser.com/datasheet/2/468/RPX_1_0-1903909.pdf
It is a 3mm by 5mm qfn with 16 pins but it ...
10
votes
3answers
830 views
Pads in IC's corners
One can sometimes observe rectangle pads in the corners of some IC's footprints:
What are they for?
0
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2answers
60 views
Creating a footprint for a component with plastic "bumps"
I think that I can best describe my question by giving two examples:
This is a TRS audio jack: https://uk.farnell.com/lumberg/1503-03/connector-receptacle-3-5mm-phono/dp/1216980. It has two plastic &...
0
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0answers
33 views
Symbol for SAW filter - DEA142450BT-3028A1
I wanted to create a symbol for the SAW filter to use for my project in PADS Professional Designer, but when I try to download the part through "PartQuest" it has no symbol or footprint. In ...
0
votes
1answer
87 views
Kicad Footprint Validation Conflict
I am trying to create a simple SMA connector footprint in Kicad but whenever I try to save the footprint to a library, Kicad generates a "validation conflict" error. I have no visibility ...
2
votes
1answer
70 views
SMT Multi-Footprint Size to IPC standards for production
I am currently designing a board that will need end up getting CE tested, and I am currently testing the effects of different sized decoupling capacitors but I am constrained on space.
I want to make ...
1
vote
2answers
141 views
Is it possible to create Altium PCB footprints without designator labels?
I'm pretty new to Altium, have years of experience with Orcad.
At the moment I'm in the process of filling a PCB library. Among them there are no-BOM footprints like test points, mounting holes and ...
2
votes
0answers
56 views
Altium mechanical layers not showing up in layer selection
edit: I'm dumb I realized I could just press "l" and manually add in the mechanical layers I need
I have a few .PcbLib documents, and all but one of them I am able to select lines, polygons, ...
0
votes
1answer
78 views
IPC-7351 vs manufacturer pad dimensions
If I were to make a make a footprint, even for a simple component like a 0603 cap, and the manufacturers recommendation differs from IPC-7351, would it be recommended to start with the manufacturers ...
4
votes
2answers
595 views
Are KiCad's horizontal 2.54" pin header and 90 degree pin headers equivalent?
I was experimenting with PCB layout in KiCad and noticed that the Connector_PinHeader_2.54mm > PinHeader_1x06_P2.54mm_Horizontal footprint and a physical 90 degree pin header I have do not seem to ...
2
votes
2answers
736 views
How to associate multiple symbols with one footprint in KiCad
I made a schematic for a 5 band analog EQ. I used OP Amps to make active bandpass filters for various frequencies within the human hearing range which means when I made my schematic I drew 5 OP Amps ...
0
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0answers
102 views
Locating and Adding Arduino Due Schematic/Footprint to Altium
I am working on the design of a PCB that is being used to allow for quick/modular swapping of sensors with specific types of connectors to various pins on an Arduino Due board. I have looked but I am ...
0
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0answers
31 views
Altium Footprint has a huge room than the footprint itself
I have a problem regarding footprint clearance or something similar while using Altium 18.1.11. The problem occurred as I designed a Pad with via on it but when I imported it to the PCB doc, the part ...
0
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2answers
345 views
KiCAD: "Footprint has no courtyard defined" using Arduino shield template
I made an Arduino shield with KiCAD.
When I finished the board in PCBnew, I ran a design rules check.
I got "Footprint has no courtyard defined" on all the mounting holes in the shield ...
0
votes
2answers
125 views
KiCAD: Ideal directory to store custom footprint
I downloaded a footprint for one IC from the internet.
It contained a .kicad_mod and a STEP file.
I have a directory where my project lives, so inside there are .pcb, .pro, .sch file and so on....
...
0
votes
2answers
685 views
KiCAD: Footprint for pushbutton (arduino)
In the last days i was trying to figure out how footprints for KiCAD work.
With help from people of this forum, i have achieved in completed all the footprints except one.
I have a pushbutton for an ...
0
votes
2answers
624 views
KiCAD: Footprints for {Axial, Horizontal, Through Hole} Resistors
I have these two resistors in my schematic, that i want to find footprints for:
Body dimensions = 2.5 x 6.8mm AND Leads dimensions = 0.6 x 28mm (like this one: https://www.acdcshop.gr/...
4
votes
1answer
1k views
KiCAD: Footprint selection for common through hole parts (resistors and capacitors)
I am in the stage that I have finished my schematic and I have to select footprints for my components before heading over to PCBnew.
However, I could not find a guide on how to select footprints for ...
0
votes
0answers
40 views
3d footprint (PCB) on PADS
I have uploaded a feed imprint from Mouser electronics site. the symbol and the Footprint are good.
but when I look at the component in 3d on the software (pads logic and pads layout) I see the power ...
2
votes
1answer
83 views
How to know component's offset when making custom footprint
First of all, I'm using KiCAD, but I guess the same problematic exists in any layout software.
When I need to create a custom footprint for an SMD component, I only set the coordinates of whatever ...
1
vote
1answer
120 views
Why do I get these odd foot prints from JLCPCB - 0602 and 1206
Why do I get these foot prints from JLCPCB?
The parts are regular 0602 and 1206 and capacitors.
I'm using KiCad 5.1.7. No external libraries. Everything is default.
My GerbView:
1
vote
1answer
43 views
Identify cable connector for fingerprint sensor
I want to create a custom PCB to which this fingerprint sensor will connect. The problem is that I cannot identify which connector it uses. The sellers on Amazon and other sites don't know about it.
...
2
votes
1answer
97 views
What USB-C Footprint is this?
I have to replace a USB-C connector. After desoldering I found a rather uncommon footprint. Has anyone seen this footprint before and knows where to find a new connector of this type?
Thank you!
0
votes
0answers
64 views
KiCAD 5 ‒ Is ist possible for a footprint to have multiple courtyards?
One of the components I am using is really a daughterboard that plugs into two rows of pin headers. Under the daughterboards, between the pin headers, there is space for a additional components. I ...
0
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0answers
36 views
Reducing Thermal Pad Size Below Official Footprint - Can It Create Manufacturability Problems?
I'm using a DP83867 Ethernet chip by Texas Instruments in an S-PQFP-G64, 10 x 10 mm package, the mechanical dimension and its recommended footprint are shown at the end of the question. As shown, the ...
1
vote
1answer
228 views
How to merge polygons into a single pad?
I need to create a pad in a PCB footprint, This pad is created using these 3 polygons but I dont know how to merge them together into one pad. I am using Altium 17.
edit
Thanks to Chris's comment,It ...
3
votes
1answer
84 views
Texas Instruments Step-Down DC-DC Converter orientation
I have a Step Down DC-DC Converter IC, purchased from Texas Instruments.
Part number: TPS54331
Datasheet: www.ti.com/lit/ds/symlink/tps54331.pdf?ts=1599690098737&ref_url=https%253A%252F%252Fwww....
6
votes
2answers
242 views
Maintaining clearances in HV MOSFET footprints
I'm thinking of making a prototype PCB which would use a bridge rectified AC, which will end up with peaks around 350V in my area (+/- some smoothing). It's a through-hole design and the circuit will ...
