In electronics packages refer to the physical encapsulation of a device. Most package names are standardized, so for example a TO-92 package will have similar dimensions and pin spacing between manufacturers so the same PCB footprint may be used. Be aware however many packages have subtle ...
10
votes
4answers
519 views
What is the protective layer around microchips made out of?
I am just curious, what is the dark, almost black material that seems like all microchips are made out of? I did some searching on Google to try and find out, but I can only seem to find the material ...
8
votes
2answers
634 views
ESR and ESL, small package vs large (SMD)
I was wondering if someone could explain why larger package capacitors (1210) are supposed to have more ESL and ESR than a smaller - say 0603 package?
I would imagine the larger package is still ...
7
votes
2answers
389 views
How thick (or thin) is the die/wafer inside an IC?
There are packages as thin as 0.3 mm (maybe even less), so I was wondering how thin the actual die/wafer inside them are. I guess the package top and bottom will also need a certain thickness to be ...
7
votes
2answers
525 views
What's the difference between WLP and BGA (IC packages)?
I read the following sentence in this Maxim appnote. (WLP = Wafer Level Packaging, CSP = Chip-Scale Package)
WLP technology differs from other ball grid array, leaded, and laminate-based CSPs ...
7
votes
1answer
448 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 ...
6
votes
3answers
459 views
How do I pick a part that goes into a breadboard when I order it?
I have just bought some 555 timers and they are timers for microelectronic circuits...could anyone tell me what I need to search for in order to get larger ones which will fit a breadboard? Thanks
6
votes
4answers
398 views
Why are 10-pin DIP integrated circuits so uncommon?
This is a tangential thought from this answer, specifically the line "There are 10 and 12 pin DIPs".
After some searching around, I finally located only one 10-pin DIP part: NTE1450, 5 Watt audio ...
5
votes
2answers
385 views
Why aren't components in DIP package shipped with straight pins?
I've noticed that all DIP packaged devices have pins which are at an angle other than \$90^{\circ}\$ and need to be bent so that the angle is right for insertion into holes on the PCB or wherever.
Is ...
5
votes
2answers
67 views
*EP pin connect to Ground
I was just wondering what is the function of the *EP pin on most TQFN package chips?
It says I should connect EP to ground, what happens if I don't ground it (I forgot)?
5
votes
2answers
226 views
How to explain this difference in pinout?
Seemingly illogical pinout has been discussed before, but my question is different.
Have a look at the pinouts for the Si8540:
One would think that the pin order would be the same for both ...
4
votes
4answers
401 views
Why are optoisolators white?
I've noticed that most of the opto-isolators (optocouplers, opto-triacs) have a white package. Why is that?
4
votes
3answers
196 views
Correct pin naming of BGA and DIL chips
Some ICs have their pins labelled only with numerical values and some use alphanumeric labels. I want to know what is the correct naming term for these cases.
Is it ok to call all the chips with ...
4
votes
3answers
486 views
Which is easier to solder: TSSOP or QFN?
Which package easier to solder on home-brew PCBs:
TSSOP
QFN
I generally use solder paste and hot-air / hot-plate.
4
votes
2answers
95 views
How are BGA dies constructed?
Are the dies made for a BGA package any different from the dies for a QFN or a DIP Package? Do BGA dies have connections on the lower side of the die? In the substrate?
How are terminals put in the ...
4
votes
1answer
150 views
Maximum number of pins/lands/balls on an IC package?
Background
I'm working on a free universal parts library tool. In an effort to optimize memory use and performance, I'm trying to work out the practical maximum number of pins you'd ever see on a ...
4
votes
2answers
980 views
How to decap a chip to expose the die?
Any suggestions to open a surface mount package (TSOP, QFN etc) to expose the die?
Possibilities tried or considered:
Split the package using wire cutters - sometimes works and sometimes doesn't
...
3
votes
2answers
528 views
In i.e. a TO-220 package, why is mounting the (pin connected) tab to case safe?
All the time I hear that the tab on a TO-220 like package is electrically connected to the centre pin, for example "out" on voltage regulators.
Does mounting them to a heatsink (of which may come in ...
3
votes
3answers
75 views
SM8 package orientation
I've received chips PCA9306DCTR (from Texas Instruments) but they don't have any dot or notch to define it's orientation (i.e. where is the pin 1).
In the datasheet there is a picture of this chip ...
3
votes
2answers
469 views
ARM controllers in small packages
Are there ARM controllers for small applications (like Cortex M0) available in small packages with maximum say 20 pins? I have the impression that in this area they don't quite are a threat for the ...
3
votes
4answers
1k views
What is µMAX IC package?
While ordering free samples from Maxim I have often seen components packaged as µMAX.
What is µMAX? When googling for it all I get are some Maxim components. If I look at google images I get an ...
3
votes
2answers
145 views
Breakout Board for 1.27 mm to 2.54 mm
Is there any breakout board like this for 1.27 mm to 2.54 mm pitch?
Example for 1.27 mm:
Example for 2.54 mm:
I also appreciate any hint how to perform this conversion on any other cheap way.
...
3
votes
1answer
94 views
Dimensions of SO8W package footprint
I'm looking for the pad dimensions and land patterns for the SO8W package. This page has drawings of many SO footprints, but no ...
2
votes
2answers
153 views
What does “Pins are on 0.17” centers" mean?
I'm looking at some switches (here) and the description reads:
Small PC mounting slide switch features SPDT contacts and white
positive action slide lever. Size about 0.56"L x 0.25"W x 0.34"H
...
2
votes
1answer
147 views
Package on package and Flip chip what is the difference?
I am confuse with Package on package and Flip chip. Are they classified as multi-chip modules (MCM)?
2
votes
2answers
240 views
What kind of package is this?
I came across this package
Never saw anything like this before. Does anyone know what it is and how it's supposed to be mounted?
1
vote
3answers
195 views
Best package for heat sinking?
I'm buying a LM317 and it comes in 3 different packages. Which is the best for attaching a heat sink? The options are:
TO-3
TO-220
TO-92
Thanks in Advance,
Dean
1
vote
3answers
71 views
SU-48 footprint
This datasheet specifies the packages for the components, but not the associated footprints.
The package of interest for me is SU-48. The obvious search brings me to this outline, but still no ...
1
vote
2answers
118 views
W65C02 QFP Package Information
I am making an Eagle part for the WDC 65C02 part (QFP version).
I can't find any specific package info in the datasheet other than the pinout, and the fact that it's a 44 pin QFC.
My question is, ...
1
vote
2answers
716 views
What is USON package? Is it the same with UTDFN
What is USON package? Is it the same as UTDFN (ultra thin dual flat no lead)?
What is the typical pin formation for 8-pin component?
4 pin on 2 side?
2 pin on 4 side?
What's the different with ...
1
vote
1answer
44 views
Where can I find a TDFN/14 part definition for Eagle?
I'm new to Eagle (previously only worked with Fritzing) and I'm porting a layout into Eagle that uses the MAX98306 IC (http://www.maximintegrated.com/datasheet/index.mvp/id/7413).
I can't seem to ...
1
vote
1answer
197 views
Do multi-channel opto-triacs with common pins exist?
I am designing a circuit with many (4-128) copies of the same component. It's a 4-pin opto-isolator with opto-triac output. I am aware that the pin spacing and package width can't be much less in ...
1
vote
1answer
282 views
Placing a Device in EAGLE
I just added a new library (the adafruit library) in EAGLE comprised of many devices and packages. I can place packages, but not devices (usually devices represent a few different specific packages).
...
1
vote
1answer
633 views
Finding right component package in Multisim
I have started using Multisim.
I designed a 5V regulator and it works in simulation, now I want to export it to UtilBoard but I can not find the right package or footprint for my component as there ...
1
vote
0answers
59 views
Why is this crystal so tall? [duplicate]
Possible Duplicate:
Does the frequency of a crystal influence its height?
I am looking at s and saw that there are some odd shaped packages. Is there a case where such a tall (13.46mm) ...
0
votes
1answer
118 views
What is this IC marked IA89G or 1A89G?
Please I need a bit of your help. Do you know what IC is this marked IA89G or 1A89G perhaps? I've tried Googling but to no avail. I'm really wondering why this is such a hard nut to crack.
Here are a ...
0
votes
0answers
27 views
LFSCP equivalent package or adapter
When prototyping I used to outsource my SMT soldering task to some website so that they solder it in a DIP adapter for me. Now, I need to test out a part but I found that is in this LFCSP package.
I ...
0
votes
1answer
171 views
capacitor termination style definitions
Mouser (for example) lists nearly 2 dozen termination styles to choose from in their part search filter. Some of these are intuitive and obvious, but I'd love to see an illustrated chart that ...
0
votes
0answers
96 views
Encoder Modules for Hobby Project [closed]
I'd like to use something like the AEDR-8300-series reflective optical encoder module in a hobby project. Ideally someone with minimal to moderate skills should be able to reproduce it, which means ...
