peculiarity
Available in a SOT23-5 package
Open^ reset output
Programmable reset timeout cycle utilizing external capacitors
Immune to short V CC transients
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The LP3470 is a micropower CMOS voltage monitoring circuit that monitors power supplies, microprocessors (μP) and other digital system designs. It provides maximum adjustable power-on reset (POR) and supervision functions. It is available in six standard reset threshold voltage (V RTH) options: 2.63V, 2.93V, 3.08V, 3.65V, 4.00V, 4.38V, and 4.63V. For voltage options between 2.4V and 5.0V, please contact your national semiconductor representative.
The LP3470 asserts that the V CC supply voltage at the time of the reset signal is below the reset threshold. Adjustable reset timeout time using an external capacitor. The time interval between the rise of the threshold voltage above V CC after reset (programmed by an external capacitor) is still assertive.
The device is available in a tiny SOT23-5 package.
Key specifications:
± 1% reset threshold accuracy over the entire temperature range
Standard Reset Threshold Voltages: 2.63V, 2.93V, 3.08V, 3.65V, 4.00V, 4.38V, and 4.63V
Custom Reset Threshold Voltage: For other voltages between 2.4V and 5.0V for the national semiconductor representative
Very low quiescent current (16μA (typical))
Effectively guaranteed^ reset drops to V CC = 0.5V
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Accurate μP and μC power monitoring
Smart Metering
Computer
Portable/battery-powered device