Hi I'm from Venezuela, I'm starting a small bussines selling electronic componets, but I can't find information about some STMicroelectronics components, In this specific case I need information about the diference between ATIC39-B3 and ATIC39-B4 A2C

[AEndz.1]

..

[Tesla DeLorean]

I don't think they are retail parts,

https://community.st.com/s/question/0D53W00000932BC/please-help-me-i-need-a-data-sheet-of-ic-atic39b4-a2c08350-or-wiring-diagram-best-regards