Need help identifying a part

Hello, I have parts in our inventory with the part marking 05AHKJG3. Is there a way to find out what the MFG part# is for this?
Thank you,

Hi jennifer.rurup,

Welcome to the Forum. Can you post a photo of the part? Might help in narrowing down the options.

I do, please see the attached.

The part marking is National Semiconductor, which is now Texas Instruments.

The important marking is the LM393N which is obsolete but can be found here:
LM393N Texas Instruments | Integrated Circuits (ICs) | DigiKey Marketplace

Thank you for your help!

Hello Jennifer,

Here is the link for the marketplace options for your LM393N comparator.

If you are curious, this link contains a brief description of how DigiKey‘s marketplace products greatly expand the number of parts offerings while at the same time making your purchase easier.

In your example, the part will be shipped from Rochester Electronics.

Best Wishes,


P.S. Please share your project with the community. It’s interesting to see how these components are used. Also, it’s encouraging to others who are just starting out in electronics.

P.P.S. FUN FACT a reasonably high performance comparator may be constructed using an op amp. This is one of the few op amp circuits that features positive feedback.

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Greetings, if you are outside of the U.S., Marketplace products are not an option. However, we do carry several similar products. Please review the datasheets to ensure they will work for your application.
AS393P-E1 Diodes Incorporated | Integrated Circuits (ICs) | DigiKey
LT1017CN8#PBF Analog Devices Inc. | Integrated Circuits (ICs) | DigiKey
NJM2903D Nisshinbo Micro Devices Inc. | Integrated Circuits (ICs) | DigiKey
LT1018CN8#PBF Analog Devices Inc. | Integrated Circuits (ICs) | DigiKey
LT1017IN8#PBF Analog Devices Inc. | Integrated Circuits (ICs) | DigiKey

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A few more alternate options for the LM393N (originally from National Semiconductor (acquired by Texas Instruments in 2011) in non-RoHS DIP package):

LM393P RoHS compliant and “Green” (**see note below), Temperature range 0 ~ 70°C
LM393PE3 RoHS compliant but not “Green”, Temperature range 0 ~ 70°C
LM393AP RoHS compliant and “Green”. Improved Input Offset Voltage compared to LM393P.
LM293P Same as LM393P but Temperature range -25 ~ 85°C
LM2903P Same as LM393P but Temperature range -40 ~ 125°C

** Green: TI defines “Green” to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement.

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