Plagued by Pull-up Resistors

[Jim Wickenhiser <jim.wickenhiser@vicom.com>]

Hi all,

I have a question about determining the maximum value of a pull-up resistor.
I have read section '4.3.3 Pull-ups' (Rev 2.2 pg. 156), and I can't find all
the values for the equation in a 3.3V environment.  The equation is:
Rmax = [Vcc(min)-Vx] / [num_loads X Iih]
plugging my values I get:
Rmax = [3.0Vcc-0.7Vcc] / [2 X Iih]

The spec provides Iih value for 5V (70ľA) in table 4-1 under section
'4.2.1.1 DC Specifications' (pg. 117) but I can't find the corresponding
value under the 3.3V section.

Any direction in locating this value in the spec or somehow calculating this
value will be greatly appreciated.  Thanks.

Jim Wickenhiser 
jim.wickenhiser@vicom.com 
Vicom Systems