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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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Reflow soldering, pin longer than pad?

I was designing the footprint for this FPC connector: Datasheet The recommended land pattern is shown here: The issue I encountered is that the pins on one side protrude outside of the pad: I ...
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How do I read the dimensions to create a PCB footprint?

I'm trying to make a PCB footprint for the SSD1306 ribbon strip, and am unsure of the correct dimensions for the solder pads. The horizontal dimensions are clear enough but I don't know where the pads ...
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1st KiCad design. Concerns with an abnormal circuit

I just wanted some input before sending this off for manufacture. It is for a test fixture and just has a funny circuit. Even though it seems relatively straight forward, it took a bit of finagling. ...
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Connector footprint JAMMA

JAMMA connectors are card edge slots that were common in arcade games before cheap SBCs. They are designed for fairly high current (5A) and are robust and cheap in a range of sizes from 8 to 72 pin. ...
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THT: What is a squared annular “ring”? [duplicate]

At least in KiCad, the footprints of through-hole pin headers have one squared annular “ring”, the other ones are round: What does the square indicate? (Also I’m wondering if there is perhaps a ...
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73 views

pcb-4-pin passive crystal is soldered to a 2-pin crystal PCB package

I would like to know whether it is suitable (not harmful) to put a 4 pin passive crystal in a 2 pin footprint. Thanks in advance. I have a 2 pin footprint in my PCB board,however,I only have a 4 pin ...
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Grid like footprint on kicad for RPM5-3 component

I'm developing a PCB in KiCAD which uses the RPM5-3 DC power module from Recom. (Link to datasheet) I created my schematic symbol and now I'm creating the footprint according to the datasheet ...
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Footprint panel is grayed on Altium Designer PCB

This is a project I imported from Eagle (not so bad by the way). I resolved all schematic compilation errors. But now I am facing some small issues in the PCB part: On the properties panel when I ...
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Interpreting USB-C land pattern

I'm replacing USB Micro and USB B connectors on my PCBs for USB-C connectors, but only using USB 2.0. So I'm looking for a connector that isn't too complex to layout or hard to solder. I found this ...
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400 views

Modifying land patterns generated with IPC-7351B wizard

I generated a 4x4mm 0.45mm pitch QFN28 according to the Atmega328P datasheet: However, the pads on the corners (1+28, 21+22, 14+15, 7+8) are too close to each other, less than 0.2mm apart (when ...
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IC has different pinouts on different packages? [closed]

I am going to use the HT16C21 LCD driver to drive my LCD. Looking at the datasheet (in the "Pin Assignment" section), I noticed that the IC comes in 4 different packages, each with varying numbers of ...
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71 views

Altium Clearance Constraints on USB Receptacle Footprint

I made a manual footprint for a USB micro-B receptacle that is now giving me problems on my PCB in Altium Designer 16. Here's the footprint drawing that I was going off of: And here's what my ...
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PCB design - paste coverage calculation for exposed pad (TL;DR version?)

I have created a Web tool for creating solder mask and paste mask for exposed pad: https://jsfiddle.net/d1wang/5t6urzwo/ The idea is get around limitation of DipTrace and help automate footprint ...
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‘One for all’ standardized land pattern v.s. specified land pattern in datasheet

I’ve designed lot of ‘simple’ PCBs for hobby and proof-of-concept purposes, but never for (mass)manufacturing. In order to do so in the future, and further expanding my design skills and knowledge, I’...
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1answer
114 views

Keepout in Solder Mask in Altium 17 for SD Card Connector

I am creating footprint for Amphenol's SD Card Connector in Altium Designer 17. The datasheet shows ...
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1answer
203 views

Creating a slotted & plated through-hole in EAGLE: where to draw milling outline

Problem summary I want to create a rectangular slot in my PCB for this component. Do I draw the milling outline on the footprint library or on the board after placing the component? Does it matter? I ...
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Crystal 4 Pins SMD footprint

I'm designing PCB that includes 24MHz SMD 4 pins crystal. According to my understanding, the crystal package marking is for Pin number 4. I wonder, how should I indicate in the PCB this pin? Should ...
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AM437x ZDN (N491 BGA) Footprint Dimensions

I have downloaded and studied the layout that TI provides for the TMDSEVM437X AM437x Evaluation Module. After calculating some distances, I concluded that the pad size used for the ZDN footprint is 0....
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Usefull 0402 and 0603 solderbridge footprints compatible with machine manufacturing?

I am currently in process of my eagle library cleanup, and came up with the idea to create a footprint similar to the one from nucleo boards. Those pads are meant to be easily bridged by just solder ...
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221 views

Altium Designer IPC Footprint wizard error for chip components

It is the first time I am designing a PCB with surface mount components. I am trying to generate footprints for 0805 resistors and capacitors, and 1210 capacitors using the IPC footprint wizard which ...
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Altium Polygon pour

I am designing a PCB in Altium. I finished my routing and proceeded to Polygon pour for Gnd plane. I was surprised to find the pour in between my 0805 caps pads as well. Although, I don't have a top ...
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181 views

edit component in *.intlib library

I have a previously used a resistor component in my project that originated from an *.intlib library. Now I want to use an alternate footprint. However, I cannot access the .schlib file of the ...
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How can I attach the same footprint to subparts of the same IC in Altium?

I have two sub parts of the same IC (STM32L476RG). I have added these sub parts as two components in the same schematic library and have attached the same footprints for both of them. But when I ...
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1answer
161 views

Smd footprint Altium

I'm trying to make the footprint of a smd resistor. But when I place the resistor on pcb layout and flip it, the pads go on bottom layer but the body remains on top layer, viewing from 3D mode. ...
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Is there a popular footprint for right angle SMT LEDs?

I am designing a PCB with SMT LEDs at the edges. The LEDs have to be right-angle type (ie. shine sideways). With regular LEDs I can use an 0805 or 0603 footprint and tell the assembly house to place ...
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How to create custom through hole pad shapes in Altium Designer?

I'm trying to create a footprint for the ACS770 current sensor in Altium Designer (17.1), which has a quitte irregular shaped pad: ('round' pad shape with slot hole, and then a small cutoff in the ...
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1answer
485 views

Defining a circular cutout in a pad in Altium

I'm creating the footprint for a Wurth inductor, 744043100. The recommended land pattern is below. They use a radius 1.8 mm circle in the middle of the component to define a void in the pad. I'm ...
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1answer
98 views

LM2596 TO-263-5 or TO-263-6

Hi just a dumb question that I have to be sure. I will be using LM2596 It is stated in its description: IC REG BUCK 5V 3A TO263-5 That its package is TO-263-5. But on its package is TO-263-6, D²Pak (...
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115 views

first pin of package LQFP

this could be most stupid question but i couldnt find where is the first pin: http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11157-32-bit-Cortex-M4-Microcontroller-SAM4E16-SAM4E8_Datasheet.pdf ...
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1answer
282 views

Strange footprint labeled PJ## on laptop's motherboard

Today I came across a picture of a laptop motherboar (below). I noticed three strange looking small footprints, labelled PJ12, PJ36 and PJ37. The J may stand for jumper, and on the top left corner ...
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1answer
137 views

Different footprints for different surface mount Resistor packaging?

When using the same surface mount package size (0402) for all my resistors on a board, but using resistors from different manufacturers or with different resistance values, should I create a different ...
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291 views

How can I draw in Eagle non circular through hole pads?

I made a custom part footprint in Eagle for a potentiometer ACP SPAIN 22k however in order to achieve a good fit I would like to draw non circuilar through hole pads. If you look at a picture of the ...
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138 views

SO-8FL Package Footprint Eagle PCB

I am making a PCB with a component that is of the Package SO-8FL. The component is n-channel MOSFET NVMFS4C03N by ON Semiconductor and the datasheet is here. I started to make the package in Eagle, ...
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212 views

How to find footprints for Altium

I wanted to have a footprint for capacitor having mouser no: 710-860020475016 and package: AL10x10.5 . Please tell me how i can find that specific part and foot print for Altium designer. I have ...
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74 views

Drawing criterias for PCB footprint

I'm working with these two MOSFET CSD18504Q5A and CSD18510Q5B. With Altium I need to design their PCB footprint, but their datasheets in the section "Recommended PCB footprint" for each dimension they ...
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59 views

Altium Plug Card [closed]

I am new to Altium and I need some help. I am trying to make a pretty simple card and need to use Altium to make the gerber files that I can send to a pcb maker. I need to make the card using this ...
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224 views

Extract part of a PCB to make a new footprint in KiCad

I have an old PCB KiCad file that I want to modify but I don't have the libraries and footprints any more Can I extract a part of the existing PCB to make a new footprint for one of the components?
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188 views

Altium keypad footprints custom pad DRC errors

I've created a rubber keypad switch footprints which is a simple contact pad design. First I used arcs and tracks to get a outline and then converted them to top copper region(two seperate regions). ...
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Can anyone tell me what an 0R-Jumper Varient C is?

I found this component in a schematic I am looking at and have searched the internet far and wide to find out what it is, alas to no avail. If anyone could explain this component and why one would use ...
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How to properly define BGA footprint in Eagle?

This question is somewhat relevant to this one. However I am sure it well deserves to be separate. I created a custom device/symbol/footprint for an ARM MCU. However I am doubtful whether I created a ...
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1answer
470 views

OrCAD PCB Designer Transistor Footprint

i want to change the position of the transistor pins (2N3904 & 2N3906, Q3,Q4,Q5 and Q7), on the first image is what i got so far (inside green oval area), the footprints are TO92. i want to ...
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61 views

Question regarding dimension when creating an EAGLE Footprint

Hi so i was trying to create a footprint based on this dimension. But i'm not quite sure what these two numbers mean exactly? Are they MAX/MIN? Which one should i use? Thank you!
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116 views

“sick” Label in Inductor Datasheet

I was looking through the following datasheet for a Sumida inductor: http://products.sumida.com/products/pdf/CDR105,105B.pdf I am creating a library component for a part in this series and when ...
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1answer
142 views

How to design the footprint when the pin positions are slightly different for each part?

I'm a beginner of electronics. I have several IN-12A nixie tubes. I want to mount the nixie tube on the PCB. However, the position of the pin in the datasheet is out of the position of the pin in the ...
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1answer
111 views

KiCad Footprints : What does the P stand for in footprint naming?

Newbie with KiCad. What does the P stand for in Diodes_THT:D_A-405_P2.54mm_Vertical_KathodeUp? I am assuming it to be PAD Length, but need to be sure.
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How can I set the pad spacing and size of the footprint of the PQFP package?

I'm beginner in electronics. I want to make footprint of HV5622 shift register using Eagle cad. But I don't know how to set the pad spacing and pad size of the footprint. There are three values in ...
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PTH drill diameter do the IPC take the pin distance in account?

I wonder if the IPC take the Pin distance tolerance in account for the drill diameter? (see p in pic). I can't find any guidelines for it anywhere. Or is it just so that it's implicitly,common sense ...
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1answer
129 views

Varying SMD Footprints in Library

I notice that when downloading a footprint from Ultra-Librarian that it often includes a set of 3. When downloading the models for the ITS414N for example it includes three slightly different ...
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1answer
712 views

How big should my pads and holes be based on this datasheet?

I've been trying to decipher the many numbers on the top picture, and it just doesn't make sense to me. Why would you need a hole of size 1.19 mm when the pins are only 0.45x0.58 mm? This leads me ...
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1answer
242 views

Does footprint matter when selecting a part in Kicad?

When designing a circuit schematic in Kicad, does it matter what footprint or package is listed in the part name? This is similar to this question, but I'm more confused about the naming scheme shown ...