How to read suffix of part nr for example 68HC711K4CFN4 replaceable by CFN3?

[cor_van_de_wate]

Sorry if this is documented here already, I tried several searches and could not find any

difference in specs between a processor part nr

68HC711K4CFN3 and the (original) CFN4 that is in the controller.

This is for an Electric Vehicle (US Electricar) which has a 50 kW 3-phase AC drivetrain made by Hughes,

unfortunately information is scarce and the CFN4 parts are hard to find,

but CFN3 are plentiful.

Anybody able to enlighten me?

Thanks,

Cor.

[kef]

The number in the HC11 part name suffix means max bus clock frequency in MHz. CFN3 - up to 3MHz bus clock (up to 12MHz oscilator frequency), CFN4 - up to 4MHz bus clock(up to 16MHz oscilator frequency).

[cor_van_de_wate]

That clarifies why I could not see any difference in functional description.

The K4 family datasheet is missing this information.

Thank you for clearing this up,

Cor.