ADT7301 Temp Sensor Digital Output IOL

The datasheet indicates that for VOL of 0.4V, the Isink = 200uA.   I have a 4.7k pull-up on the DOUT pin and a Vdd of 4.7V.

This implies I need to sink 1mA, which is not unreasonable.  The datasheet has no chart of Vout vs Iout.

How much current can DOUT sink?

(Normally I would remove the pull-up, but it is on an existing module to which I must connect an external SPI Bus.)

Thanks for your help,

Richard