I doubt there is a publicly available data sheet. I think it would require some social engineering of the right people (maybe some social lubricant) to get any details on the sensors used, hence the reverse engineering required.
I don't doubt, it is here - http://datasheets.maximintegrated.com/en/ds/DS28EA00.pdf
it is a "1-Wire Digital Thermometer with Sequence Detect and PIO"
As it is from the same manufacturer as the DS18B20 and the register layout looks familiar (not checked the details)
I would start with DS18B20 code to see how far it works.