PCA9536: How to calculate Vol(output low voltage)

Hi Kato-san,

Figure 8 could be used as long as the sink current is known.  To compute the sink current, you can divide the voltage drop across the pull-up resistance (Vpullup - VOL) and then divide by its resistance.  To simplify the calculation, you could initially assume that VOL is 0 V and Isink = Vpullup / Rpullup.  This will slightly overestimate the sink current and thus the VOL.

Regard,
Max