TLC555: 2 batches of chips are X-rayed, which is different

Hello Zhang Wei, welcome to the TI e2e forums.

zhang wei said:

lease help confirm if there is a PCN for this change

Yes,

zhang wei said:

Can the new batch of chips be used?

Yes, both are data sheet correct. They are not exactly the same 

See this FAQ: [FAQ] TLC555: performance differences PCN 20231130002.1