Mystery STM chip 324 P7C806 - found in a Honeywell Smartfit Control Unit.

Anyone in STM have a datasheet for a P7C806 chip?

 

Its part of a 2 wire bidirectional digital serial communications link, so may be a level shifter or line driver?

 

Thanks.

 

[TDK]

LM324DT, quad op amp

https://www.st.com/en/amplifiers-and-comparators/lm324.html

 

Really a humble 324 LOL... I was fooled by the P7C806 label haha.

Anyways very much obliged :o)