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UM803

Union Semiconductor
Part Number UM803
Manufacturer Union Semiconductor
Description 3-Pin Microprocessor Reset Circuits
Published Jan 14, 2019
Detailed Description UM803 3-Pin Microprocessor Reset Circuits UM803 SOT323/SOT23-3 General Description The UM803 is a microprocessor (μP) ...
Datasheet PDF File UM803 PDF File

UM803
UM803

Overview
UM803 3-Pin Microprocessor Reset Circuits UM803 SOT323/SOT23-3 General Description The UM803 is a microprocessor (μP) supervisory circuit used to monitor the power supplies in μP and digital systems.
It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.
3V, +3.
0V or +2.
5V powered circuits.
The circuit performs a single function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety of supply voltages are available.
_____________ The UM803 has an open-drain output stage.
The UM803’s open-drain RESET output requires a p__u__l__l_-_u__p___resistor that can be connected to a voltage higher than VCC.
The UM803 has an active-low RESET output.
The reset comparator is designed to ignore fast transients on VCC, and the outputs are ...


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