Rainbow Electronics DS1721 User Manual

Page 3

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DS1721

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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

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