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'[EE] IC labels'
2010\07\25@094532 by Roger Weichert

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Hi guys,

I must be missing something, but I really struggle to identify a lot of later smd ICs with weird codes.

The latest board I'm working on has a dozen mostly 8 and 14 pin SOIC's. Most I've eventually been able to identify, but there are still two 8 pin ones I need help with. I've tried as many combinations as I can think of in searching, but still no joy.

They both have a label with three lines

2272A1    (or 2272AI)
24T
D6XE

The second,

2702C
46M
C9V7

Both of these chips appear to be linear devices, not digital, and running with a VCC of 5 volts. I haven't been able to identify a company logo  ... it has been hard enough reading what's on them as it is.

Thanks for any help with either these chips or perhaps a publication with codes that identify various devices. I do have a manual for some of the more common smd transistors and fets etc which is very handy.

Once I find what the IC is, the data sheet tells me the code on the package, but that's the wrong way around. I need the code so I know what data sheet to download.

How do you guys get on?

Regards,  Roger

2010\07\25@101303 by Olin Lathrop

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Roger Weichert wrote:
> I really struggle to identify a lot
> of later smd ICs with weird codes.
>
> ...
>
> How do you guys get on?

I do by designing new stuff, not by trying to reverse engineer others'
designs.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000

2010\07\25@101505 by Mike Harrison

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On Sun, 25 Jul 2010 23:15:29 +0930, you wrote:

{Quote hidden}

Either texas
TLC2272
TLC2702

Or ST TS2272
TS2702


>Thanks for any help with either these chips or perhaps a publication with
>codes that identify various devices. I do have a manual for some of the more
>common smd transistors and fets etc which is very handy.
>
>Once I find what the IC is, the data sheet tells me the code on the package,
>but that's the wrong way around. I need the code so I know what data sheet
>to download.
>
>How do you guys get on?
>
>Regards,  Roger

2010\07\25@102453 by John Coppens

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On Sun, 25 Jul 2010 23:15:29 +0930
"Roger Weichert" <spam_OUTrweicherTakeThisOuTspambigpond.net.au> wrote:

> 2272A1    (or 2272AI)
> 24T
> D6XE

TLC2272ACDR ?

> 2702C
> 46M
> C9V7

TLV2702 ?

Joh

2010\07\25@102837 by Mike Harrison

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On Sun, 25 Jul 2010 10:13:05 -0400, you wrote:

>Roger Weichert wrote:
>> I really struggle to identify a lot
>> of later smd ICs with weird codes.
>>
>> ...
>>
>> How do you guys get on?
>
>I do by designing new stuff, not by trying to reverse engineer others'
>designs.

Maybe he's trying to repair something you designed..;-)

2010\07\25@182146 by Roger Weichert

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Thanks Mike and John,

It looks like they are TLC2272AID and TLV2702.

Farnell have the former, I'll keep looking for the other.

Thanks again,   Roger



{Original Message removed}

2010\07\26@162323 by RussellMc

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> Roger Weichert wrote:
>> I really struggle to identify a lot
>> of later smd ICs with weird codes.

>> How do you guys get on?

OL responded:
> I do by designing new stuff, not by trying to reverse engineer others'
> designs.

Clearly 'all you were doing was stating what you do".
But
That really does sound like you are intending to imply that he is a
thief or something akin to one.
Was that your intention?

The next level down is it sounds like you are implying he is a thief
or something akin to one.
Were you aware of that?

It's really hard not to see that as an ad hominem* attack - or at
best, smart alec ad hominem comment.
It's hard to see that it serves any useful purpose, educational or
other or contributes, positively or otherwise, to the technical
content in any way.

If you wish to post personal attacks on people or snide comments
please do so in OT - they may or may not be appropriate there but can
be judged on their merit as required without annoying too many people.



                  Russel

2010\07\26@165102 by Olin Lathrop

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RussellMc wrote:
>>> How do you guys get on?
>
>> I do by designing new stuff, not by trying to reverse engineer
>> others' designs.
>
> Clearly 'all you were doing was stating what you do".
> But
> That really does sound like you are intending to imply that he is a
> thief or something akin to one.
> Was that your intention?

Geesh Russell, I guess if you try really hard you can find a way to get
offended by just about anything.  Give it a rest.

This wasn't a snide comment, or trying to teach him something, or holier
than though, or anything else of that nature.  I was just answering his
question.

I thought he had a good question about reversing cryptic markings back to
real part numbers, but I don't know of a good way to do that either.  I
wasn't going to respond at all until he asked how I got around that.  Note
that's quite different from asking how to solve the problem and is a
question I do know the answer to, so I answered.  I thought it was sortof a
poll, so that "this problem doesn't come up for me" is a valid answer.  If
most people don't have the problem, then it might explain the lack of a
simple solution.

If I were now in Russell mode being a third party looking under every stone
for someone offending someone else, I'd protest your implication that
reverse engineers are all thieves.  Fortunately I'm not though, so I won't.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000

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