DS1721 Datasheet, PDF (3/16 Pages) Dallas Semiconductor – 2-Wire Digital Thermometer and Thermostat

DS1721
temperature falls below TL. Thus, any hysteresis can be realized for fan control without external
components.
Digital data is written to/read from the DS1721 via a 2-wire interface, and all communication is MSb
first. Multipoint sensing is possible with the DS1721 by uniquely setting the 3-bit address of up to eight
parts on the 2-wire bus.
DS1721 FUNCTIONAL BLOCK DIAGRAM Figure 1
3 of 16