Author Topic: What's this please? (Component Advice)  (Read 388335 times)

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Offline TerraHertz

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Re: What's this please? (Component Advice)
« Reply #1325 on: April 26, 2018, 12:41:11 am »
Just Google 'smd codebook' and there's a heap to try and sort through 'till you find the 'flavor' you like.

"smd codebook" - ah, the magic keyword. Lots of good stuff, thanks!  This is what my original question hoped for.

I would _never_ have thought of trying that word.
Every time I think I've got a handle on this newfangled Internet thing, I come across another proof that no, I don't.
Will I _ever_ get good at searching? Maybe not. That's what happens when the greater portion of your life went by before the Net existed.
« Last Edit: April 26, 2018, 12:43:13 am by TerraHertz »
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Online tautech

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Re: What's this please? (Component Advice)
« Reply #1326 on: April 26, 2018, 12:51:30 am »
Just Google 'smd codebook' and there's a heap to try and sort through 'till you find the 'flavor' you like.

"smd codebook" - ah, the magic keyword. Lots of good stuff, thanks!  This is what my original question hoped for.

I would _never_ have thought of trying that word.
Every time I think I've got a handle on this newfangled Internet thing, I come across another proof that no, I don't.
Will I _ever_ get good at searching? Maybe not. That's what happens when the greater portion of your life went by before the Net existed.
:-DD That was 'me' 20+ yrs ago but when I started to teach the kids how to use the 'net it was interesting to see what they thought would be good keywords to use. We all think a little differently (thank heavens) and now Google is much better than in early days however you can still get too hung up on a particular search style whereas sometimes the KISS principle works best.  :)
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Offline TerraHertz

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Re: What's this please? (Component Advice)
« Reply #1327 on: April 27, 2018, 03:12:48 am »
The irony with SMD codes... (quote from The SMD Codebook)
"SMD devices are, by their very nature, too small to carry conventional semiconductor type numbers. Instead, a somewhat arbitrary coding system has grown up, where the device package carries a simple two-or three-character ID code."

When in fact, seeing the precision already present with laser-etched numbers on the parts, they could easily write actual part numbers with at least 5 or 6 symbols.
We already use magnifying devices to look at SMD parts anyway; it doesn't matter if the numbers are too small to read by eye.

I think there's probably two factors involved in the continued use of cryptic, ambiguous codes.
1. Habit. Started using codes when numbers could only be printed on. Kept using them when laser marking rendered size irrelevant.
2. Obfuscation. Codes are something of an impediment to reverse engineering.

Or maybe the time and power needed to laser-mark is a profit-margin factor?
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Online tautech

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Re: What's this please? (Component Advice)
« Reply #1328 on: April 27, 2018, 03:43:48 am »
On the other hand when SMD code books and Google don't produce results .....and one's getting desperate I've chucked the SMD marking into an Aliexpress search only to be rewarded with dozens of results and all of them correct !  :scared:
 :)
Last one was a 7 digit display driver SOIC16 GC7137A.....couldn't find it anywhere else !
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Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1329 on: April 27, 2018, 07:58:59 am »
#1 Laser etching tinier numbers would add to the cost of the parts, in an already competitive market.
 #2 Devices are made to be disposable now. Nobody is meant to read those numbers.
 
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Offline CJay

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Re: What's this please? (Component Advice)
« Reply #1330 on: April 27, 2018, 09:01:23 am »
Not for any better reason than my own curiosity*, I'[ve recently been given a USB-Lightning cable for charging i Devices (I have the burden of having to deal with them at work)  and it's obviously a rip off one, but, it passes diagnostics as a genuine Apple cable, so, I popped the end open and found a pair of SOT-23 devices, one six pin, one three pin and I'm very curious as to what they are.

SOT-23 6 pin is marked A8213 and the 3 pin is marked A19T


* Is there any better reason for doing things than curiosity?
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Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1331 on: April 27, 2018, 04:42:51 pm »
I've chucked the SMD marking into an Aliexpress search only to be rewarded with dozens of results and all of them correct !

Yes, but there is usually no information about the part. Only the same number you managed to read off the part.  :)
They only want you to buy it, not look it up elsewhere.
« Last Edit: April 27, 2018, 04:46:23 pm by timelessbeing »
 

Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1332 on: April 27, 2018, 04:45:31 pm »
found a pair of SOT-23 devices, one six pin, one three pin and I'm very curious as to what they are.

1 minute with the Gargler tells me that A19T is a AO3401 mosfet.

A8213: possibly voltage regulator
https://www.microsemi.com/document-portal/doc_download/132261-lx8213-datasheet
« Last Edit: April 27, 2018, 05:00:27 pm by timelessbeing »
 

Offline CJay

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Re: What's this please? (Component Advice)
« Reply #1333 on: April 27, 2018, 05:15:38 pm »
Mhmm, I will admit to knowing that one already, the 6 pin one was the main interest, maybe I need to pop the other end of the cable open and look for more parts in there as I was under the impression that Apple cables were 'smart'?
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Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1334 on: April 27, 2018, 07:37:04 pm »
Mhmm, I will admit to knowing that one already
:wtf: Well thanks for sending us on a chase for you.
 

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Re: What's this please? (Component Advice)
« Reply #1335 on: April 27, 2018, 08:00:44 pm »
I've chucked the SMD marking into an Aliexpress search only to be rewarded with dozens of results and all of them correct !

Yes, but there is usually no information about the part. Only the same number you managed to read off the part.  :)
They only want you to buy it, not look it up elsewhere.
Yes that has been my experience too but not always.
Often, when on a wild goose chase we need glean tiny tidbits of info from wherever we can find them.
SMD codes are sometimes referred to the actual device # from which we can then find the datasheet and subsequently a source or equivalent part.
Members like gamalot have an advantage as they are capable and confident with TaoBao and that can open more doors of parts accessibility.
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Offline scuzzyTerminator

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Re: What's this please? (Component Advice)
« Reply #1336 on: April 28, 2018, 09:32:32 pm »
I've found a few dozen of these surplus components some years ago. Normally I only buy stuff I can identify but I must have thought these were too cute.

I can't say if the marking is "Oh"4F or "Zero"4F.

Any help? Thanks.
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1337 on: April 28, 2018, 11:04:24 pm »
This maybe? https://ww2.minicircuits.com/pdfs/GALI-4F+.pdf

It’s SOT89 with markings 04F
He’s like a trained ape. Without the training.
 
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Offline scuzzyTerminator

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Re: What's this please? (Component Advice)
« Reply #1338 on: April 28, 2018, 11:25:22 pm »
BINGO!

Would you explain how you were led to it?

Thanks much.
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1339 on: April 28, 2018, 11:38:12 pm »
Step 1: Identify chip package
Step 2: Query search engine for chip package + surface marking
Step 3: Identify relevant results
Step 4: Rank results
Step 5: Select most probable result
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Offline scuzzyTerminator

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Re: What's this please? (Component Advice)
« Reply #1340 on: April 29, 2018, 12:21:18 am »
duh

I had thought it was a SOT-223. Thanks again.
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1341 on: April 29, 2018, 10:37:58 am »
Yes, the gazillion of different footprints can be quite a challenge :)
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Offline CJay

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Re: What's this please? (Component Advice)
« Reply #1342 on: April 30, 2018, 08:10:31 am »
Mhmm, I will admit to knowing that one already
:wtf: Well thanks for sending us on a chase for you.

Yeah, cos it took you so long to do but please feel free to ignore me in future, I'll be sure to ignore you.
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Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1343 on: April 30, 2018, 08:57:10 am »
Thank you. I'm flattered.
 

Offline niladherbert

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Re: What's this please? (Component Advice)
« Reply #1344 on: May 02, 2018, 10:55:16 am »
Not really a 'what's this' post but related. I'm planning on building an s100 computer, and motherboards are pretty expensive so I'm planning on making that first myself to reduce costs. I'm on te's samples program and was wondering if this is the right connector (no links as their site is pretty weird with those)
TE Part # 2-5530843-2
Also these Hirose connectors
https://www.hirose.com/product/en/products/CR22/CR22-100D-2.54DS%2870%29/
https://www.hirose.com/product/en/products/CR22/CR22A-100D-2.54DS%2870%29/
They are probably identical but just want to be sure
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1345 on: May 02, 2018, 07:22:00 pm »
They are probably identical but just want to be sure

Y U NO CHECK manufacturer info?
He’s like a trained ape. Without the training.
 
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Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1346 on: May 02, 2018, 09:25:46 pm »
34 pin
0.95mm pin pitch

ST Microelectronics e3 Z
692263A
9913G VP
MYS 99 738

e3 = emulated EEPROM?
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1347 on: May 02, 2018, 09:59:36 pm »
Jotrin has these listed as a lot of 800 https://www.jotrin.com/product/parts/692263A
Link to datasheet is no avail @STM though.

The e3 - emulated eeprom is emulated in onboard flash memory afaik. My guess would be an 8-bit MCU, but who knows :)
Maybe write to STM support for a datasheet?
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Offline Cyberdragon

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Re: What's this please? (Component Advice)
« Reply #1348 on: May 05, 2018, 07:30:54 pm »
Mhmm, I will admit to knowing that one already, the 6 pin one was the main interest, maybe I need to pop the other end of the cable open and look for more parts in there as I was under the impression that Apple cables were 'smart'?

There should be digital logic for it to recognize it. The "mosfet" might be a mislabeled regulator (intentionally?) and the other chip holds the program. If theres no coil for converting a fet wouldn't make much sense.
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Offline amyk

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Re: What's this please? (Component Advice)
« Reply #1349 on: May 06, 2018, 02:23:12 am »
I believe the (e3) marking is related to RoHS. ST are well known for making custom parts with unobtainium datasheets, this one is no exception.
 
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