●General Description
●The AP1701/2/3/4 are used for microprocessor (µP) supervisory circuits to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by
●eliminating external components and adjustments when used with +5V, +3.3V, +3.0V powered circuits.
●These circuits perform a single function: they assert a reset signal whenever the VCCsupply voltage declines below a preset threshold, keeping it asserted for at least 240ms after VCChas
●risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The AP1701/2/3/4 have push pull outputs. The AP1701/3 have an
●active low RESET output, while the AP1702/4 has an active high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in
●the correct logic state for VCCdown to 1V. Low supply current makes the AP1701/2/3/4 ideal for use in portable equipment. The AP1701/2/3/4 is available in a 3-pin SC59 package.
●Features
●• Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
●• Fully Specified Over Temperature
●• Available in three Output Configurations
●• Push-PullRESETLow Output (AP1701/3)
●• Push-Pull RESETHigh Output (AP1702/4)
●• 200ms Min. Power-On Reset Pulse Width
●• 20µA Supply Current (Typ.)
●• Guaranteed Reset Valid to VCC= +1V
●• Power Supply Transient Immunity
●• No External Components
●• Green Package: SC59-3L
●• Lead Free Finish / RoHS Compliant (Note1)
●Applications
●• Computers
●• Controllers
●• Intelligent Instruments
●• Critical µP and µC Power Monitoring
●• Portable/Battery Powered Equipment
●• Automotive
