UM803,PDF数据表下载

UM803 pdf资料下载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 pull-up 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 guaranteed to be in the correct logic state for VCC down to 1V. Low supply current makes the UM803 ideal for use in portable equipment. The UM803 is available in a 3-pin SOT323 and SOT23 package. UM803LP UM803MP UM803JP UM803TP UM803SP UM803RP UM803ZP UM803LS UM803MS UM803JS UM803TS UM803SS UM803RS UM803ZS Datasheet pdf资料数据表下载