How do you read the date code on this part?

[alank2]

http://www.epsondevice.com/docs/qd/en/DownloadServlet?id=ID000639

I've got some marked "1102A" and another marked "3382B" and "3472B"...

Thanks,

Alan

[TimFox]

1102 should be the 11th week of 2002.
3382 should be the 33rd week of 1982.
3472 should be the 34th week of 1972, which doesn't seem reasonable.

[alank2]

which doesn't seem reasonable.

I agree.  I don't see a doc on their website that covers date codes either and how it is decoded isn't mentioned in the datasheet...

[w2aew]

There really is no standard on date coding.  A common convention is WWYY, but it is certainly not a standard.  Companies are free to choose any system they desire for date or lot code marking (including none at all).

[Shock]

Could be Y/WW/XX (XX being batch/run/machine etc).

[amyk]

Have you tried asking Epson?

The Japanese are known for using some different calendars like the one based on the date of the emperor, but Y/WW/XX or WW/Y/XX seems like a good guess.

[alank2]

Have you tried asking Epson?
The Japanese are known for using some different calendars like the one based on the date of the emperor, but Y/WW/XX or WW/Y/XX seems like a good guess.

I emailed them.

A new one to add to the mix:

F162B
F172B

Date also found on reel 2006.05.04

So the "16" and "17" would be the week.

That leaves the "F" and the "2B"...

[amyk]

Probably this:

1 = 1991
2 = 1992
...
8 = 1998
9 = 1999
0 = 2000
A = 2001
B = 2002
C = 2003
D = 2004
E = 2005
F = 2006

2A/2B could be the location it was made.