All Questions
10
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
384
views
Understanding the package drawing of a qfp
I am designing my very first PCB and there are a few things on the package drawing of my microcontroller that are unclear to me.
Why are the sizes expressed in fractions?
e.g.: 0,23/0,13 or 0,75/0,...
2
votes
1
answer
623
views
Hand soldering QFP component
I recently came across this video on YouTube, in which the guy is soldering a .5 mm QFP component.
Hand soldering a .5 mm QFP Chip
As I haven't done a lot of soldering in my life (and never used ...
- 79
4
votes
1
answer
1k
views
Solder mask for 0.5mm pitch TQFP
I'm using Atmel SAM chips and the data sheets don't have any mention of solder mask clearance for their TQFP packages. What would be a nominal pad/solder mask opening/cream size for a 0.5mm pitch ...
- 285
3
votes
2
answers
416
views
Minimum distance from TQFP to chip cap on PCB assembly?
I want to put decoupling caps (0603) as close as possible to TQFP-48-7x7. So PCB/assembly wise how close I can put them (pad to pad, component to component)?
Does the 'court yard' need to be exactly ...
- 361
1
vote
3
answers
1k
views
QFP on stripboard, without PCB?
Are there any tricks I can use to connect a QFP (or similar) package component to a stripboard (veroboard), without the hassle of setting up a personal PCB fabrication kit to make a breakout board?
I'...
- 10.8k
15
votes
1
answer
17k
views
What is the difference between VQFP, HVQFP, TQFP & PQFP?
VSC7145XRU-31/C - this IC uses PQFP package
the replacement component for that TLK2201 uses HVQFP package
also TLK2541 uses TQFP
that's why i wanted to know whats the clear difference between ...
- 151
5
votes
2
answers
2k
views
Pad dimensions and land patterns for QFPs
I'm putting together a footprint for a 100-pin, 14x14mm TQFP, and I'm finding conflicting designs. The pitch and width of the pads are all basically the same, but the length and centering of the pads ...
- 20.1k
19
votes
1
answer
36k
views
LQFP package vs. TQFP package?
In my PCB editor, both LQFP and TQFP have the same footprints, except the TQFP has shorter leads than the LQFP. Is that the only difference?
- 31.9k
22
votes
8
answers
3k
views
Pre-programming surface mount ICs
I'm trying to set up a PCB with an atmega168 and no programming header. I intend to use a serial bootloader (there is a ft232 on the board) to reprogram but I am wondering about the best way to ...
- 5,115