MAX811MEUS Maxim Integrated Products, MAX811MEUS Datasheet

MAX811MEUS

Manufacturer Part Number

MAX811MEUS

Description

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX811MEUS.pdf (8 pages)

Specifications of MAX811MEUS

Case

SOT143

Date_code

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________________General Description

The MAX811/MAX812 are low-power microprocessor

(µP) supervisory circuits used to monitor power sup-

plies in µP and digital systems. They provide excellent

circuit reliability and low cost by eliminating external

components and adjustments when used with 5V-

powered or 3V-powered circuits. The MAX811/MAX812

also provide a debounced manual reset input.

These devices perform a single function: They assert a

reset signal whenever the V

below a preset threshold, keeping it asserted for at

least 140ms after V

old. The only difference between the two devices is that

the MAX811 has an active-low RESET output (which is

guaranteed to be in the correct state for V

1V), while the MAX812 has an active-high RESET out-

put. The reset comparator is designed to ignore fast

transients on V

operation with a variety of supply voltages.

Low supply current makes the MAX811/MAX812 ideal

for use in portable equipment. The devices come in a

4-pin SOT143 package.

________________________Applications

___________Typical Operating Circuit

19-0411; Rev 4; 12/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

PUSHBUTTON

MAX811

MAX812

SWITCH

GND

________________________________________________________________ Maxim Integrated Products

. Reset thresholds are available for

(RESET)

RESET

has risen above the reset thresh-

supply voltage falls

( ) ARE FOR MAX812

RESET

INPUT

GND

µP

down to

4-Pin µP Voltage Monitors

with Manual Reset Input

♦ Precision Monitoring of 3V, 3.3V, and 5V

♦ 6µA Supply Current

♦ 140ms Min Power-On Reset Pulse Width;

♦ Guaranteed Over Temperature

♦ Guaranteed R R E E S S E E T T Valid to V

♦ Power-Supply Transient Immunity

♦ No External Components

♦ 4-Pin SOT143 Package

_______________Ordering Information

*This part offers a choice of five different reset threshold volt-

ages. Select the letter corresponding to the desired nominal

reset threshold voltage, and insert it into the blank to complete

the part number.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

___________________Pin Configuration

____________________________Features

MAX811_EUS-T

MAX812_EUS-T

Power-Supply Voltages

R R E E S S E E T T Output (MAX811), RESET Output (MAX812)

PART*

TOP VIEW

( ) ARE FOR MAX812

NOTE: SEE LAST PAGE FOR MARKING INFORMATION.

(RESET) RESET

SUFFIX

GND

RESET THRESHOLD

-40°C to +85°C

TEMP RANGE

SOT143

MAX811

MAX812

VOLTAGE (V)

4.63

4.38

3.08

2.93

2.63

= 1V (MAX811)

PIN-PACKAGE

4 SOT143

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