AS1925

www.DataSheet4U.com AS1925, AS1926 U l t r a - L o w Vo l ta g e M i c r o p r o c e s s o r S u p e r v i s o r y Circuit with Manual Reset D a ta S he e t 1 General Description The AS1925/AS1926 microprocessor supervisory circuits were designed to assert a single reset if the monitored supply voltage drops below its reset threshold or if the manual reset is activated. The reset remains asserted for a fixed timeout delay after VCC has risen above the reset threshold and the manual reset is deasserted. Their small size, excellent circuit reliability, and low supply current (3.5µA) make the AS1925/AS1926 a very low cost solution by eliminating external components and adjustments when used with low-voltage (+0.9 to +1.5V) systems. The devices are available as the standard products listed in Table 1. Table 1. Standard Products Model AS1925 AS1926 Output Type Active-Low Push/Pull, Active-High Push/Pull Active-High Push/Pull, Active-Low Open-Drain 2 Key Features ! Factory-Trimmed Reset Thresholds for Monitoring Supplies from 0.9 to 1.5V Low Power Consumption: 3.5µA Reset Threshold Accuracy Over Temperature: ±2.5% Four Timeout Periods: 1.5ms, 30ms, 210ms, and 1.68s Three Reset Output Types: - Active-Low Push/Pull - Active-High Push/Pull - Active Low Open-Drain Guaranteed Reset Valid to VCC = 0.55V (ActiveLow) Manual Reset Input Immune to Fast VCC Transients 5-pin SOT23 Package ! ! ! ! ! ! ! ! The active-low open-drain reset output requires a pullup resistor that can be c...