Good morning!
The following microcircuits were purchased:
MAX17579ATC
ADRF5022BCCZN
ST1L05CPU33R
After receiving the microcircuits, there is a need to check the correspondence of the received microcircuits to the name in the order. The technical description of none of these microcircuits does not indicate what marking should be on the case. Accordingly, it is impossible to check the correctness of the received microcircuits. Can you help with this issue?
These ICs usually lack full commercial package markings. Manufacturers instead print short internal top-marking codes. MAX17579ATC likely has abbreviated Maxim-style laser markings.
ADRF5022BCCZN probably uses tiny RF-package identification codes. ST1L05CPU33R normally carries brief STMicroelectronics top markings. Package dimensions and pin counts should match datasheet specifications. Electrical testing provides the most reliable identification method. Microscope photos can help verify authentic manufacturer marking styles.
Manufacturers do not put their marking explanations out in the public due to counterfeit problems. There are sometimes caveats if date code formats change, but this is rare. This is sort of a catch 22 because you are trying to figure out legitimate markings, but there are steps that DigiKey takes to prevent counterfeits being sold. You can read more on our quality standards here. DigiKey buys directly from the manufacturer and documents date and lot code from the manufacturer’s documentation provided to us directly. You can ask for manufacturer Certificates of Conformance from Customer Service to help with the documentation process.