All Questions
Tagged with pcb-assembly integrated-circuit
8
questions
5
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Question on "Parts should be used within 5 days after opening." statement on component shipping package
I've been given the task of verifying a batch of ICs from a chinese broker, to see that the chips the company has bought are what the broker claims they are. The package we've received looks like this,...
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0
votes
1
answer
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Washing of an IC
Can someone tell me what is the information regarding the process of washing the device during production?
This question is with respect to the Microchip LAN8741A
user220456
24
votes
4
answers
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Why are there no BGA chips with triangular tessellation of circular pads (a "hexagonal grid")?
Ball grid arrays are advantageous integrated circuit packages when a high interconnect density and/or low parasitic inductance is paramount. However, they all use a rectangular grid.
A triangular ...
- 8,661
2
votes
1
answer
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TSOP-54 Adapter for prototyping
I am using an ARM M based development board (1) from TI. I wish to extend RAM (from default 256KB to 256 KB+ 8MB)by following the provided reference design (2).
The design uses an ISSI DRAM ...
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0
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1
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Suggestions for in-house PCB/FPC lab? [closed]
We are a hardware startup based out of Greece, looking for in-house PCB/FPC fabing solutions/equipment. LPKF's ProtoLaser U3/S look great but they cost $140K and $70K (if I'm not mistaken) ...
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27
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4
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Which of these marks signifies Pin 1 on the STM32F (LQFP64)?
I'm using the STM32F105, in a LQFP64 package. It has two circular markings, on opposing corners of the IC. This picture is for a different ST ARM, but the markings and silkscreen are similar:
The ...
- 17k
12
votes
3
answers
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PCB fabrication vs PCB assembly
What is the difference between PCB fabrication and assembly? Some companies like Golden Phoenix list that based on the size of PCB, it outputs a quote.
Mine was 2.1 x 1.6 inch. It outputted 29 pieces ...
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1
vote
1
answer
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What kind of failure would I see in moisture sensitive parts?
I am reflowing a design using an electric skillet. When the uC and LEDs arrived they were in moisture sensitive packaging. They were in sealed bags with moisture indicator cards. After I opened them I ...
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