**Part Number:**SN65LBC179

When checking the resistance values to Ground from Pin 8 (Differential Input A) and Pin 7 (Differential Input B) I am getting values higher than I expect. Based on the image below from the datasheet and some quick calculations I am getting that I should get around 30k ohms for input A, and about 23k ohms for input B. Now what I am actually getting when measuring is 35k ohms for input A and 26.5k ohms for input B for a recent lot I am using. However, these seem pretty high. Looking back at the datasheet I noticed that the 18k ohm and 100k ohm are specified as nominal. So I assumed a 10% tolerance on those and also the 12k ohm and still got values below what I should be measuring (~32.3k ohm & ~24.18k ohm).

What I would like to know is what is the tolerance of the Nominal Resistors? +/- 20%?

I am guessing that these nominal resistances would vary from Lot to Lot of parts so I should but should be able to measure the resistance to ground within some sort of definable range.

Thanks, David