All Questions
27
questions
1
vote
1
answer
108
views
Can I use LQFP on same TQFP footprint?
I need to order a 32 pin LQFP chip and replace it with another 32 pin TQFP chip so is it ok to replace it or it won't be compatible?
The chip is an STM8S003K3 MCU
1
vote
1
answer
165
views
Package and footprint - Are they correct
In this device, on page 208, the page has the Package outline drawing. 8-pin package. SOIC.
"8S2, 8-lead, 0.208” Body, Plastic Small
Outline Package (EIAJ)"
I want the footprint of this ...
- 1
2
votes
1
answer
787
views
What are wettable flanks in semiconductor packages?
What are wettable flanks? Is there any difference between packages with wettable flanks and other leadless packages?
Can we say the package given above has wettable flanks?
6
votes
3
answers
995
views
How is the CQFP64 package supposed to be soldered?
I am currently designing a PCB containing an ATmegaS128 with the CQFP64 package (see picture below and page 460 of its datasheet), but I do not know how it can be soldered. Can the golden frame and ...
- 351
3
votes
1
answer
83
views
Missing row 'I' in package numbering convention: why?
So, I recently discovered a quite painful mistake in my PCB regarding the PGA socket numbering. I have used a row numbered I in my footprint, while the package has ...
- 161
0
votes
0
answers
241
views
TQFP socket for QFP package
I'm trying to get data off of this IC, and I'm having trouble finding a suitable package. In addition, I need to test ~5 of these on the same PCB, so I need to use a socket.
The problem is, I need ...
0
votes
3
answers
129
views
What is the difference between package description and package option?
I am making an ECG sensor schematic on EAGLE and I am concerned if this is something I should be taking into account while designing?
- 312
5
votes
1
answer
2k
views
What is the difference between TO-3 and TO-204AA packaging?
I am trying to build a circuit for a power amplifier and TO-204AA is the packaging used in the circuit diagram.
KiCad does not have TO-204AA but it has TO-3.
Looking at the image below you will see ...
- 312
2
votes
1
answer
1k
views
When should bare die be used instead of QFN/BGA packages?
I have no experience with bare die as a package, and I have been recently tasked with deciding between bare die, BGA, or QFN package for a SoC.
Searching the internet, I have not really found much ...
2
votes
1
answer
2k
views
Pros and Cons of QFN and BGA packages
As a PCB designer, is there a known list of advantages and disadvantages to using BGA vs. QFN packages?
Here is the list I have discovered (please correct me if they are incorrect):
BGA
Pros:
Smaller ...
0
votes
2
answers
828
views
Are all the DIP-16 packages the same for PCB library design?
I am designing PCB library for a component whose Package is DIP-16. I have already footprint of this Package in other components. Can I use them interchangeably in the new component in terms of their ...
- 85
1
vote
1
answer
850
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 ...
5
votes
3
answers
9k
views
Securing a PCB board to a plastic casing - can I just glue the bottom?
I have an inertial measurement unit PCB that picks up changes in acceleration. I want to secure it inside a plastic box/casing. The products (and pictures) I want to use are below:
https://www....
- 1,156
2
votes
2
answers
928
views
Cost effect of different component packages during PCB assembly
We are looking at starting PCB design in house, up until now we have outsource design and manufacture. This means that we have yet to see the real cost of the PCB, components and assembly as discrete ...
- 4,146
0
votes
1
answer
166
views
Reference of component
I´m trying to repair my lock control in my car. And this board seems like the problem, so I want create a new board (exactly the same) based on this. But I facing a challenge:
I cant determine what ...
- 101