MIC811_U

更新时间： 2024-11-27 22:51:19

品牌	Logo	应用领域
麦瑞 - MICREL		微处理器复位电路
页数	文件大小	规格书
8页	159K
描述
Microprocessor Reset Circuits

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MIC811_U 数据手册

MIC811/MIC812 Microprocessor Reset Circuits

MIC811/MIC812

Microprocessor Reset Circuits

Description

Pin Configuration

The MIC811/MIC812 are inexpensive microprocessor

supervisory circuits that monitor power supplies in

microprocessor based systems.

Top View

The function of these devices is to assert a reset if

either the power supply drops below a designated reset

threshold level or MR is forced low. Several different

reset threshold levels are available to accomodate 3V,

3.3V or 5V powered systems.

The MIC811 has an active low RESET output, while the

MIC812 offers an active high RESET output. The reset

output is guaranteed to remain asserted for a minimum

of 140ms after V

reset threshold level. The MIC811/MIC812 come in a 4-

pin SOT-143 package.

has risen above the designated

Features

Typical Applications

RESET Remains Valid with V

as 1.4V

as Low

Portable Equipment

Intelligent Instruments

Precision Voltage Monitor for 3V, 3.3V

or 5V Power Supplies

Critical Microprocessor Power Monitoring

Printers/Computers

Available in 4-Pin SOT-143 Package

<15µA Supply Current

Controllers

140ms Minimum Reset Pulse Width

Manual Reset Input

Reset Threshold

Voltage (V)

Device

Suffix

4.63

4.38

4.00

3.08

2.93

2.63

Typical Operating Circuit

Ordering Information

Part

Package

Temp. Range

-40°C to +85°C

MIC811_U

MIC812_U

4-Lead SOT-143

Place the device suffix of desired reset threshold voltage from table above in

blank to complete the part number.

12 3 4 5 6 7 8

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