Hi, Russ

Have a Happy new Year ... and plenty of readers.

a little trip through the datasheets I have shows for parameter "D 133"

12 F 683 : 2 - 2.5 ms ( last edition ...)

16 C 84a : typ 10 ms
16 F 84a : 4 - 8 ms
16 F 877 : 4 - 8 ms
16 F 88 : 2 - 4 ms
16 F 88x : 2 - 2.5 ms

18 F 1320 : typ 2ms
18 F 8723 : typ 2.5 ms
18 F 4523 : typ 4 ms

so ... it seems a factor of process method ... or chip generation.

That also stick to what you've read in the different manuals ... for the date they have been written ...

Alain