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Questions tagged [tqfp]

For questions about the TQFP (thin quad flat pack) integrated circuit package. Consider using in conjunction with the "integrated-circuit" tag.

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identifying component 12QF 65I COVQ

Can you please help identifying this component with top marking: 12QF 65I COVQ Device: an earlier 2020 revision of Xmos isolated I2S USB interface
cserl's user avatar
  • 13
7 votes
4 answers
645 views

STM32F4 TQFP100 part orientation

I have mounted a STM32F446VETx on my PCB as shown on a picture of my PCB: For me the pin 1 marker in the big mark at the top right of the picture, near C67. But, after a lot of trial, I can't connect ...
Blup1980's user avatar
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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
Hazardous Voltage's user avatar
0 votes
2 answers
238 views

ATmega328p TQFP basic PCB

Is there an error in the basic schematic and PCB drawing of the Arduino?
571E's user avatar
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0 answers
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TQFP fanout for DFM / AOI

I've often heard a couple of "good practices" for TQFP/QFN ICs fanout: Do not route corner pins at 90°, instead the track must come straight to the pin: Do not short the signals directly ...
romain145's user avatar
  • 131
0 votes
1 answer
135 views

Pogo pin version of ISP cable for AVR mega8 in TQFP-32 package [closed]

There are a few 6pin and 10pin pogo variants of Atmel ISP adapters that require dedicated ISP pogo pads on the PCB. There are full TQFP-32 ZIF sockets that can be used to program any AVR in that ...
Anton Krug's user avatar
10 votes
3 answers
992 views

Pads in IC's corners

One can sometimes observe rectangle pads in the corners of some IC's footprints: What are they for?
Łukasz Przeniosło's user avatar
0 votes
0 answers
91 views

ATmega168 TQFP vs. 28DIP - different behavior after programming

I have developed a program for ATmega168 using Atmel Studio 7.0 and Atmel-ICE as debugging interface. The development was done on a 28DIP package, since it's easy to work with it on a breadboard. ...
hamid's user avatar
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0 votes
0 answers
64 views

atmega 328 tqfp sketch upload

After soldering my atmega328 tqfp smd chip on my PCB, i can see that my chip is working with a standard blink sketch uploaded earlier The problem is that i cannot upload a new sketch using FTDI ...
Mehdi's user avatar
  • 33
3 votes
4 answers
2k views

Solder bridging when reflowing QFP

Today I attempted to reflow solder a board using a solder paste mask and a hot air station but for a QFP chip, I got a of solder bridging. This has generally been my experience with trying to solder ...
Emil Eriksson's user avatar
2 votes
1 answer
261 views

How to programm AVR ATmega48 in TQFP32 soldered onboard?

I have a board (actually - many of them) with ATmega48PA (TQFP32) soldered in and no ISP connector. Some of the ISP lines are even not routed. I used Hobbyking programmer to connect to the processor ...
Roman Matveev's user avatar
1 vote
5 answers
584 views

Programming a AVR in TQFP package

So I got an ATmega328P in a 32 pin TQFP package, along with the breakout board shown. I have connected the pins in accordance with the datasheet. I added the decoupling capacitors after searching ...
hacker804's user avatar
  • 602
4 votes
2 answers
439 views

Is this a fake STM32F105? There is no parts listed with that many pins

I am working with a device that has a 100 pin qfp it is labeled: ARM Z STM32F105R8T6 But this part only seems to be available in a 64 pin package. The R in the number dictates that it is a 64 pin ...
Newbie Noob's user avatar
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,...
LandonZeKepitelOfGreytBritn's user avatar
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 ...
Marko Scekic's user avatar
1 vote
1 answer
1k views

Burning bootloader on atmega1284 tqfp

Is the process of burning a bootloader (JChristensen's mighty-1284 to be precise), on an Atmega1284 microcontroller same for both DIP (Atmega1284p) and tqfp (Atmega1284-au)? While searching online ...
Marko Scekic's user avatar
10 votes
4 answers
13k views

In production, is there a significant difference between QFN or TQFP components other than space?

When producing a run of PCBs, does it matter if I choose QFN or TQFP components? Say, I want to have 1000 boards manufactured with an Atmel AVR that is available in QFN or TQFP packages. The QFN ...
Niels Heidenreich's user avatar
1 vote
1 answer
178 views

Any reason not to bend the pins on TQFP and VQFP packages

I have an FPGA with a VQFP package, and I need to bend some pins back and hand solder them to fine gauge wire. Is it likely that this will damage the device?
Display name's user avatar
0 votes
1 answer
544 views

Need Help... So Confused with this QFP32 SA663 Socket

I purchased an SA663 clone QFP32 Socket online, but to my extreme dismay, it doesn't work, or at least I haven't been able to get it to. Basically the original SA663 is a 1:1 pinout. But after trying ...
Dominic Luciano's user avatar
10 votes
3 answers
2k views

Find first pin of a LQFP chip

I have bought some ATSAM4E8C chips in LQFP 100 package. The datasheet shows that the IC should have a dot indicating the first pin, but mine have two dots. One larger in the corner, and a smaller ...
user17152's user avatar
  • 337
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 ...
pdel's user avatar
  • 285
1 vote
1 answer
9k views

TQFP vs QFP landpattern

I know these packages have different thickness, but I have a hard time to find a TQFP landpad spec. Is it using the same landpad as for QFP (reflow soldering)?
Max Kielland's user avatar
1 vote
2 answers
503 views

Pickit 3 and PIC18F46J53

I have connected Pickit3 and the above TQFP PIC microcontroller on a PCB and connected the respective pins to it. I have checked for short circuits between pins and found none. What could be the ...
Rookie91's user avatar
  • 2,138
1 vote
2 answers
1k views

Easiest way to solder connections to all the legs on a surface-mount chip?

Recently, I went through the process of soldering wires onto the legs of a TQFP chip (~0.8mm pitch) which has already been mounted on a PCB. This is a project where I am doing some modifications to ...
TreyK's user avatar
  • 131
5 votes
4 answers
2k views

how to manually solder exposed-pad QFP package (Altera 144 pins)

I need to manually solder an exposed-pad QFP Altera FPGA. This is crucial, since the pad is used for electrical purpose (not for thermal purpose) I have tried the following but failed. I just put ...
Josh Vo's user avatar
  • 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 ...
Tim's user avatar
  • 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'...
Polynomial's user avatar
  • 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 ...
K S K Chaitanya's user avatar
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 ...
Kevin Vermeer's user avatar
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?
Thomas O's user avatar
  • 32k
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 ...
jeremy's user avatar
  • 5,115