Features: ` Simultaneous Triple-Voltage Monitoring` Very-Low Supply Current: 6.5µA` ±1.5% Accuracy Over Temperature` Reset Time Delay: 200ms ` Power Supply Transient Immunity` Guaranteed Reset for VCC3 1V or VCC18 1V` Active-Low Push/Pull Reset Output (AS1920)` Active-Low Open-Drain Reset ...
AS1922: Features: ` Simultaneous Triple-Voltage Monitoring` Very-Low Supply Current: 6.5µA` ±1.5% Accuracy Over Temperature` Reset Time Delay: 200ms ` Power Supply Transient Immunity` Guaranteed Reset...
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The devices are ideal for personal computers, note- books, battery-powered systems, embedded controllers, intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply monitoring application.
The AS1920 and AS1922 microprocessor supervisory circuits were designed to generate a reset when at least one of the three monitored supply voltages falls below its respective trip threshold.
These very-low-current (6.5A, typ) devices AS1922 maintain reset for a minimum timeout period after all supplies have stabilized. Guaranteed to be in the correct state for VCC down to 1.0V, these devices are perfect for multiple-voltage systems with low current requirements and strict monitoring requirements.
The devices are available with the following output types:
All devices monitor primary and secondary factory trimmed voltages. Additionally, a third monitoring voltage of AS1922 can be selected via an external resistor divider.
The AS1920 has an active-low push/pull reset output, whereas the AS1922 has an active-low open-drain reset output.
The AS1920 and AS1922 are available in a 5-pin SOT23 package.