ATTiny & Other Ebay AVR genuine?

Off-topic Chatter
1

I was ordered 10pcs of ATTiny13A-SU from ebay which cost only 5.60$ shipped.
I have few Tiny13A from friend who brought from digikey.
Digikey AVRs can clearly see laser engraving markings but on ebay avrs, markings very faint.

I suspect those non genuine ATMEL

2

Any difference in the laser markings other then being faint? Typefont or positioning. Markings on the bottom?

3

Digikey ATTiny13 is ATTiny13A-SSU. ebay one is ATTIny13A-SU (little larger package size)

type font looks same.
front, bottom markings location layout also same.

update:
I found one chip dead. it can’t programmed. detecting wrong signature.

4

You could send an email to Atmel. Perhaps they can tell from the bottom markings. Codes may look right but not actually match a proper lot.

Bunnie has posted some interesting things on counterfeit chips & microSD.
Sparkfun had counterfeit atmel chips too. Both bunnie’s and sparkfun’s chips were not true clones tho / not functional chips.

Can the rest of these ebay chips be programed ok?
I’ve seen laser chip markings get harder to read / faint just from oils on my finger. Perhaps the air was really filthy wherever your ebay chips were packaged.

5

Thanks for the information

I tested 3 chips. one failed. other two works. one chip programmed 98% of its flash and works.
other one tested with Power down sleep mode. work without any issue. power draw as specified.

all remaining 7 chips passed signature test. (I use usbasp & khazama gui software)

for physical chip, I will post some photos soon.