LM3875TF lot number

DreadPirate · 23rd January 2011, 09:00 PM

I'm installing a pair I got as a kit and I've discovered my two chips have different lot numbers. One is JM79AB, the other JM91ABE3. I look on ebay and I see different vendors showing a pair of LM3875s in their listing's photo, and they two are mismatched. I guess matched lot numbers do not matter? Are they even available?

jaycee · 24th January 2011, 03:31 AM

you'd probably get matched lot numbers if you bought from a big supplier, but to be honest it doesnt matter one bit.

Speedskater · 24th January 2011, 03:18 PM

Years ago at my day job, we discovered a manufacturing defect with a power semi-conductor device. But things got complicated when we found out that the date code was added when they sold the device not when it was mfg. When they made them they just put them in the bin randomly.

AndrewT · 24th January 2011, 04:56 PM

I would get worried if different suppliers had stock with the same batch number, particularly if the source was an unofficial retailer.

23rd January 2011, 09:00 PM	#1
DreadPirate diyAudio Member Join Date: Jan 2006 Location: Northern Virginia, USA	LM3875TF lot number I'm installing a pair I got as a kit and I've discovered my two chips have different lot numbers. One is JM79AB, the other JM91ABE3. I look on ebay and I see different vendors showing a pair of LM3875s in their listing's photo, and they two are mismatched. I guess matched lot numbers do not matter? Are they even available?

24th January 2011, 03:18 PM	#3
Speedskater diyAudio Member Join Date: Sep 2002 Location: Lakewood, Ohio	Years ago at my day job, we discovered a manufacturing defect with a power semi-conductor device. But things got complicated when we found out that the date code was added when they sold the device not when it was mfg. When they made them they just put them in the bin randomly. __________________ Kevin

24th January 2011, 04:56 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I would get worried if different suppliers had stock with the same batch number, particularly if the source was an unofficial retailer. __________________ regards Andrew T.

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24th January 2011, 03:31 AM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	you'd probably get matched lot numbers if you bought from a big supplier, but to be honest it doesnt matter one bit.

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