What mean the number at the top of the ATMEGA328 ?

Other Hardware General Electronics
1

Hi, I want to but an ATMEGA328 and i see a number at the top of the chips for that i want to know what mean.

0936

600×600 24.5 KB

1052

1206

800×600 37.1 KB

1310

2

manufacturing lot or date code.

Often 4-digit date codes are YYWW (ie, 1206 was manufactured in the 6th week of 2012), but some manufacturers use different numbering schemes.

3

DrAzzy:
manufacturing lot or date code.

Often 4-digit date codes are YYWW (ie, 1206 was manufactured in the 6th week of 2012), but some manufacturers use different numbering schemes.

There isn't any difference between new and old chips?

4

aymannox:
There isn't any difference between new and old chips?

There shouldn't be, but if any process errors are found, the manufacturer can trace back.

5

Sometimes the manufacturer changes the chip geometry with newer chips having smaller geometry. That is the size of the smallest detail on a chip. This might change some things but normally the chip still covers the specifications in the data sheet. So look on the manufacturer chip history/ revision record.

Otherwise it does not matter how old the chip is as long as it has been stored correctly.

However on one occasion a PiC chip was changed and the manufacturer said there was no difference with a chip division. However we found this was not true as the EEPROM could only write four bytes at at a time, not singilly. It caused a bit of a problem for the RFID readers we were making at the time.