MIC803-26D2VC3(2010) 데이터 시트보기 (PDF) - Micrel

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MIC803-26D2VC3
(Rev.:2010)

3-Pin Microprocessor Supervisor Circuit with Open-Drain Reset Output

Micrel 

MIC803

3-Pin Microprocessor Supervisor Circuit

with Open-Drain Reset Output

General Description

Features

The MIC803 is a single-voltage supervisor with open-drain

reset output that provides accurate power supply

monitoring and reset generation in microprocessor based

systems. The function of the device is to assert a reset

signal if the power supply voltage drops below the Reset

Threshold voltage, and retain this reset for the Reset

Timeout Period once the power supply increases above

the Reset Threshold voltage.

The MIC803 consumes only 4.5μA of supply current and

offers three reset delay periods of 20ms, 140ms and

1120ms (min). It features factory programmed reset

threshold levels from 2.63V to 4.63V to accommodate

3.0V, 3.3V, and 5.0V power supplies. It is available in the

compact 3-pin SC-70 and SOT-23 packages.

• 4.5μA supply current (typical) at 3.6V

• Open-Drain /RESET output

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

• 20ms, 140ms, or 1120ms (min) reset timeout Options

• 2.63V to 4.63V Preset Voltage Threshold Options

• 2.5% Voltage Threshold Accuracy over temperature

• 3-pin SC70-3 package (2.0mm x 2.1mm)

• 3-pin SOT-23 package (2.3mm x 2.9mm)

• -40˚C to +125˚C Junction Temperature Range

Applications

• Critical microcomputer power monitoring

• Portable equipment

• Solid state drives

• Printers/computers

• Embedded controllers

____________________________________________________________________________________________________________

Typical Application

VCC

VCC

VCC

100k

MIC803

µP

RESET

RESET

GND

GND

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

December 2010

M9999-122310-A

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