MAX6845UKD3+T

MAXIM INTEGRATED PRODUCTS  MAX6845UKD3+T  芯片, 微处理器监控器, 1.8V, SOT-23-5

The is an ultra low voltage microprocessor µP reset circuit and voltage detector in 5 pin SOT-23 package. This supervisory circuit monitors ultra low voltage power supplies in µP and digital systems. It provides excellent circuit reliability at low cost by eliminating external components and adjustments when used with 0.9V to 1.5V systems. The MAX6845 provides a RESET IN input which allows user to externally adjust reset threshold. Reset comparator is designed to ignore fast transients on VCC. It asserts a reset signal whenever VCC supply voltage declines below preset or adjustable threshold or whenever manual reset active-low MR is asserted. Reset remains asserted for fixed timeout delay after VCC has risen above reset threshold and when manual reset is deasserted. The MAX6845 is used in computers, controllers, intelligent instruments, critical µP and µC power monitoring, telecom/networking equipment, base stations and servers/workstations.

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Supply voltage range from 550mV to 1.8V

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Operating temperature range from -40°C to 85°C

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Adjustable threshold RESET IN

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Low power consumption of 5.7µA VCC = 0.9V, no load, reset not asserted

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±2.5% reset threshold accuracy over temperature

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Reset valid to VCC = 0.55V active low

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Active-low open-drain reset output and debounced manual reset input active-low MR

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Immune to short VCC transients

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Reset active timeout period of 210ms

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Requires a pull-up resistor that can be connected to voltage from 0 to VCC