Our company purchased the PCF8583T/5,518 from China. It wasn't purchased from an official distributor because it's EOL. Based on the attached documents, can we determine that this item is not genuine?
My personal advice is to avoid companies in Shenzhen; they are almost all fake, and they collude with local testing agencies to create fake test reports. I suggest you look for a Hong Kong company that conducts WHL testing and has a Certificate of Conformity (COC).