LM3478: The rule of datecode

chentsu chung

Part Number: LM3478

Hi Sir,

Colud you help to tell me what's the rule of datecode? You have provided me the link below but it doesn't match the datacode I saw on the IC LM347x

http://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/How-to-identify-STC-_2600_-LTC.PDF

Or could you please let us know what is each datecode means and the assembly site?

71C1
7369
74VN

Thank you.

over 7 years ago

0 Youhao Xi over 7 years ago

TI__Guru* 78190 points

I need to forward this to our product engineer. Are these three lines printed on the same IC, or they are from three ICs?

0 Jiyuan Luan over 7 years ago in reply to Youhao Xi

TI__Prodigy 160 points

Hello,

Date code is encoded differently depending on the IC. Can you take pictures of the date codes you mentioned above so we can make sure we have the complete and correct date codes? Thanks.

Regards,

Jiyuan

0 chentsu chung over 7 years ago in reply to Youhao Xi

Mastermind 6180 points

Hi Youhao,

Yes, they are three different IC

0 chentsu chung over 7 years ago in reply to Jiyuan Luan

Mastermind 6180 points

Hi Jiyuan,

I will provide it ASAP, but It's not about what datacode I mentioned, it's about the datecode rule of this IC.

0 chentsu chung over 7 years ago in reply to chentsu chung

Mastermind 6180 points

Hi,

Please check the picture below, thank you.

0 Jiyuan Luan over 7 years ago in reply to chentsu chung

TI__Prodigy 160 points

Hello Chentsu,

For the picture you attached, the 2nd line "S14B" is the product ID for LM3478MM/MMX, and the top line is the D/C.

The specific D/C rule for this product is 1st character stands for the assembly year, 2nd character stands for the assembly month, and last two digits for internal lot coding. This is not a universal rule so your best chance is to check with a TI local rep. to be sure.

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LM3478: The rule of datecode