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UM809AAP

更新时间： 2024-11-29 00:28:59

品牌	Logo	应用领域
英联电子 - UNIONSEMI		/
页数	文件大小	规格书
15页	322K
描述
3-Pin Microprocessor Reset Circuits

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UM809AAP 数据手册

UM809/810

3-Pin Microprocessor Reset Circuits

UM809/810 SC70-3/SOT23-3

General Description

The UM809/810 series are ultra low current, cost effective system supervisory circuits designed to

monitor the power supplies in digital systems. They provide a reset signal to the host processor

when necessary, offer excellent circuit reliability & low cost by eliminating external component

and adjustment when used with +5V, +3.3V, +3.0V or other voltage powered circuits.

The reset output is driven active within 10 µs of power supply falling through the reset voltage

threshold. Reset is keeping active for a minimum of 140ms after system power supply has risen

above the reset threshold. Reset threshold suitable for operation with variety of supply voltage are

available.

UM809 has an active-low reset output while UM810 has an active-high reset output. The UM809

/ 810 are optimized to reject fast transient glitches on the power supply line, and the reset output

are guaranteed to be in the correct logic state for power supply V_CCdown to 1V.

Each of these ICs consists of a voltage reference comparator, resistors for detector threshold

setting, delay generator, output driver & hysteresis circuit. The reset threshold & time delay are

fixed with high accuracy internally and does not require any external adjustment.

Low supply current of 3 µA (V_CC=3V) makes UM809/810 ideal for low power application. Both

devices are available in 3 Pin SC70 or SOT23 packages.

Applications

Features



CPU and logic circuit Reset

Power fail detector

Computers

Embedded system

Battery powered equipment

Intelligent instrument



Wide operation voltage range of 1V to 10V

Typical Quiescent current of 3μA

No External components

3-Pin small SC70 and SOT23 packages

V_CCTransient immunity

Correct logic output guaranteed to V_CC=1.0V

Precision V_CCmonitor for 2.5V, 3.0V, 3.3V,

and 5.0V supplies



Available in 2 output configurations

Push-pull low active Reset output(UM809)

Push-pull high active Reset output(UM810)

Wide operation Temperature: -40℃ to 105℃

Pin Configurations

Top View

UM809/810

M: Monthly Code

SC70-3/SOT23-3

________________________________________________________________________

http://www.union-ic.com Rev.04 Dec.2013 1/15

12 3 4 5 6 7...15

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