Decoding SMD package markings

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#1
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Hi Guys,

 

I've been doing a little bit of reverse engineering and I find myself stuck on a part I cannot seem to identify.

Its a SOT-23-5 with A63A etched on the top.

I have tried a few SMD code apps/sites but they lead me to some voltage detector ICs and some little DC-DC switchers.  Neither of these make any sense in the context of the design. There are only passive peripheral components (R & C, no L).

 

So does anyone have an idea or some "go-to" SMD code websites they could share?

 

Thanks,

Steve.

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There is no universal standard for this; it is all manufacturer-specific - possibly even product-specific for different products from the same manufacturer.

 

And, if it's a high-volume product, the markings might actually be custom to the product manufacturer ...

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Yeah that's true of course. Just hoping someone might have a lead or another index site to check.

 

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schtevo wrote:

Its a SOT-23-5 with A63A etched on the top.

 

The LM321, which is an op-amp has that code.

 

I've just reverse engineered a board myself with similar problems. What I find helps is having a stab at what the component might be, based on where it is in the circuit, and putting that in the search term.

"This forum helps those that help themselves."

"If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."

 

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At first, I was only getting voltage regulators too cheeky

 

Here is a site that finds the LM321. Might be useful to complement the other sites.

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Well whatdiya know - LM321 fits the bill nicely.  I had anticipated an op-amp but could NOT get it to fit the circuit topology.  Seems there's another SOT23-5 pinout I didn't have in my library.

 

Thanks for the part and new web link guys.

 

Cheers,

Steve

 

* added "NOT" . Ross *

 

Last Edited: Mon. Aug 14, 2017 - 06:42 AM