Questions tagged [footprint]
Footprints are the CAD representations of the pads (and other physical/mechanical features) of a board-level component.
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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:
...
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26 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 ...
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27 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 ...
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19 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 ...
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11 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 ...
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17 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 ...
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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 ...
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816 views
Pads in IC's corners
One can sometimes observe rectangle pads in the corners of some IC's footprints:
What are they for?
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49 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 &...
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24 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 ...
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50 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 ...
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37 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 ...
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48 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 ...
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44 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, ...
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54 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 ...
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306 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 ...
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244 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 ...
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57 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 ...
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28 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 ...
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144 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 ...
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2answers
66 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....
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300 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 ...
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2answers
216 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/...
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1answer
611 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 ...
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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 ...
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1answer
60 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 ...
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1answer
105 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:
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39 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.
...
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1answer
86 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!
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46 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 ...
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30 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 ...
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110 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 ...
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1answer
78 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....
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2answers
175 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 ...
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45 views
Importing Altium schematics to a PCB is placing some components on a forbidden and an unaccessible area
I was using Altium 16 and generating PCB from schematics with no room generation. I have created my components library by mostly using "ultra librarian" files. I do these steps as many other ...
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337 views
SOP-4 Package Footprint Standard
I've got a TCMT1102 Vishay optocoupler. Its a 4-pin SMD part but there is no standard package type associated on the datasheet - i.e SOP, SSOP, TSSOP etc. Vishay has a footprint document that ...
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14 views
PowerElement footprint confusion
I am attempting to use some of ERNI's PowerElement parts but the associated datasheet and catalogue does not appear to be clear on the associated press fit feet
https://www.erni.com/en/products-and-...
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54 views
Any advantage in AC-DC or DC-DC with past, large form factor semiconductors?
I want to clarify this question with my real-world example:
Say you have a device which contains some AC-DC converter (or DC-DC) for rather high power specs (10 kW up to 300 kW, not in the same ...
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61 views
What's the smallest footprint dual H-bridge?
I am designing a circuit with 4 small electric motors. The motors I selected are SMT and are driven by 3V power source. It makes sense to drive each pair of motors by a dual H-bridge, but I can't find ...
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536 views
Altium error: “net contains multiple output pins” on LT3045 chip
I have two concerns:
Is it okay to have "contains multiple output pins error" in Altium?
Is anyone familiar with LT3045 chip? Its datasheet applications only have 1 "IN" pin and 1 ...
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1answer
171 views
Why have the same chip in the same package, but with a different number of pins?
STMicroelectronics offers the following two accelerometer chips.
The LIS2DW in a 14 pin LGA package
The LIS2DW12 in a 12 pin LGA package
These two chips are functionally equivalent and have the same ...
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3answers
236 views
KiCad footprint or supplier footprint?
I download symbols and footprints from the component supplier into a project's library to go faster but I realized that many of the standard components footprints are slightly different in KiCad, like ...
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1answer
65 views
Custom Altium footpring
I want to design a concentric circle shaped footprint in Altium. The inner one is Vcc while the outer is GND. I tried placing the pad and such but there is no way I can have the outer circle with the ...
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80 views
Are only standard footprints ever used? What if a manufacturer wants a devices footprint but the manufacturer doesn't list it?
They want a BOM like this but the part I want doesn't list a footprint. It lists the components dimensions and then you have to make the footprint yourself so I don't think there is a standard name. ...
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437 views
Altium Collision DRC error? Cant figure out why
i have finished my PCB design with Altium. I ran the DRC, to check if there are any errors. Strangely i got like hundreds of errors. First i couldn't find out why, but i managed to narrow it down to ...
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45 views
addition of external footprint to ki cad
I have downloaded a .stp file of MAX14878 foot print. I tried to add it to the library through manage footprints options. It shows a table where it is added. But I am not able to find it during edit ...
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37 views
In Altium Designer how do I navigate to the component editor from the PCB layout screen?
I am teaching myself Altium Designer 2017 coming from EAGLE. If I want to edit a component in EAGLE I can right click on it in the board view and then click "open footprint". Is there a similar ...
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136 views
Number of pins of elements
I've created a footprint for the rotary encoder, which symbol is shown below
A footprint for this element has been done by myself.
I've been getting a warning which goes like this:
"WARNING(ORCAP-...
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1answer
121 views
Heatsink land pattern interpretation (DPAK heatsink)
I'm looking at using a D Series heatsink from Ohmite. The land patterns on the last page of the product PDF are very lightly labeled and I'm not entirely sure how to interpret them https://www.ohmite....
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237 views
How to integrate external library into KiCad
I am using KiCad (5.1.5). I got this self-made library from my lab mate he told me to make some changes to his schematic. Inside the folder that he gave consists the following folders and files:
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