MIC812LUYTR Micrel Semiconductor, MIC812LUYTR Datasheet

MIC812LUYTR

Manufacturer Part Number

MIC812LUYTR

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC812RUTR.pdf (7 pages)

Specifications of MIC812LUYTR

Date_code

05+

Packing_info

SOT-143

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General Description

The MIC811 and MIC812 are inexpensive microprocessor

supervisory circuits that monitor power supplies in micropro-

cessor based systems.

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.

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

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.

If a microprocessor voltage supervisor with an open-drain

output stage is needed, see MIC6315.

Typical Application

September 2005

MIC811/812

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

has risen above the designed reset threshold level.

MIC81 1

V CC

RESET

Features

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

• /RESET remains valid with V

• 5µA typical supply current

• 140ms minimum reset pulse width available

• Manual reset input

• Available in 4-pin SOT-143 package

Applications

• Portable equipment

• Intelligent instruments

• Critical microprocessor power monitoring

• Printers/computers

• Embedded controllers

V CC

plies

RESET

Microprocessor Reset Circuits

V CC

µP

MIC811/812

as low as 1V

MIC811/812

Micrel

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