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The PT7A751X/752X/753X family microprocessor (µP) supervisory circuits are targeted to improve reliability and accuracy of power-supply circuitry in µP’s systems. These devices reduce the complexity and number of components required to monitor power-supply and battery functions. The main functions are: 1. Asserting reset output during power-up, power down and brownout conditions for µP system. 2. Detecting power failure or low-battery conditions with a 1.25V threshold detector. 3. Watchdog functions (not for PT7A753x)