Datasheet > MIC811_14

MIC811_14

更新时间： 2024-09-09 00:57:19

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麦瑞 - MICREL		/
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Microprocessor Reset Circuits

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MIC811_14 数据手册

MIC811/812

Microprocessor Reset Circuits

General Description

Features

The MIC811 and MIC812 are inexpensive microprocessor

supervisory circuits that monitor power supplies in

microprocessor based systems.

• Precision voltage monitor for 3V, 3.3V or 5V power

supplies

• /RESET remains valid with VCC as low as 1V

• 5μA typical supply current

• 140ms minimum reset pulse width available

• Manual reset input

The function of this device 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 accommodate 3V, 3.3V or 5V

powered systems.

• Available in 4-pin SOT-143 package

Applications

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 VCC has risen above the designed reset

threshold level. Having a push-pull output stage, the

MIC811/812 does not require a pull-up resistor at the

output. The MIC811/812 comes in a 4-pin SOT-143

package.

• Portable equipment

• Intelligent instruments

• Critical microprocessor power monitoring

• Printers/computers

• Controllers

If a microprocessor voltage supervisor with an open-drain

output stage is needed, see MIC6315.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Typical Application

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Revision 2.0

September 9, 2014

12 3 4 5 6 7

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