In one of our board designs, we were using a well-known manufacturer's 25Mhz oscillator, to provide a clock to a gigabit Ethernet PHY. When we wanted to assembl

In one of our board designs, we were using a well-known manufacturer's 25Mhz oscillator, to provide a clock to a gigabit Ethernet PHY. When we wanted to assemble the boards, we could not find this oscillator in any official distributor, so we bought them from a vendor in China, who had some in stock. When we assembled the boards, none of the boards functioned properly. There was no Ethernet connectivity, the PHY wasn't working We contacted the "well known manufacturer" and provided photos of the part and they confirmed that the oscillator was not theirs. It was a counterfeit part. The "counterfeit" oscillator actually did provide a clean 25Mhz clock, but the PHY did not work. It amazes me there are companies out there that produce counterfeit silicon. I wonder what's their profit margin?