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General Description

The MAX16055 precision hex voltage microprocessor

(µP) supervisory circuit monitors up to six system-sup-

ply voltages and asserts a single reset when any one

supply voltage drops below its preset threshold. The

device significantly reduces system size and compo-

nent count while improving reliability compared to multi-

ple ICs or discrete components.

A variety of factory-trimmed threshold voltages are avail-

able to accommodate different supply voltages and tol-

erance with minimal external components. The

MAX16055 includes internally fixed threshold options for

monitoring 3.3V, 3.0V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1.0V,

and 0.9V supplies with -5% or -10% tolerance. The

MAX16055 is also available with one to five adjustable

threshold inputs to monitor voltages down to 0.5V.

A single active-low, open-drain output asserts when

any monitored input falls below its associated thresh-

old. The reset output features a weak internal pullup

(typically 70µA) to supply input IN1. The reset output

remains low for the reset timeout period (140ms, min)

after all voltages rise above the selected thresholds.

The reset output remains valid as long as either IN1 or

IN2 input voltage is above 1V. The MAX16055 is avail-

able in a small 10-pin µMAX

(3mm x 3mm) package.

The MAX16055 operates over the -40°C to +125°C

automotive temperature range.

Applications

Features

o Precision Factory-Set Reset Threshold Options

3.3V, 3.0V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1.0V, and

0.9V

o Adjustable Voltage Threshold Monitors Down to

0.5V with 1.5% Accuracy

o Open-Drain RESET Output with 70µA Internal

Pullup

o Fixed 140ms (min) Reset Timeout Period

o Manual Reset Input

o Reset Valid for IN1 ≥ 1V or IN2 ≥ 1V

o Tolerance Select (5%/10%) Input

o Immune to Short Supply Transients

MAX16055

Ultra-Small, Hex Voltage,

Microprocessor Supervisor

________________________________________________________________

Maxim Integrated Products

1 +

GND

RESET

TOLIN4

IN3

IN2

IN1

MAX16055

µMAX

TOP VIEW

IN6IN5

Pin Configuration

Ordering Information

MAX16055

µP

RESET

10kΩ

IN2

GND

TOL

MONITORED

SUPPLIES

IN1

0.1µF

IN3

IN4

IN5

IN6

Typical Operating Circuit

19-4411; Rev 0; 1/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Denotes a lead(Pb)-free/RoHS-compliant package.

Insert the desired threshold option letter from the Selector

Guide into the blank to complete the part number. Contact factory

for availability.

PART TEMP RANGE

PIN-PACKAGE

MAX16055_AUB+*

-40°C to +125°C 10 µMAX

Telecommunications

High-End Printers

Desktop and Notebook

Computers

Data Storage Equipment

Networking Equipment

Industrial Equipment

Set-Top Boxes

Servers/Workstations

µMAX is a registered trademark of Maxim Integrated Products, Inc.

1 2 3 4 5 6 7 8 9

Resumo do Conteúdo

Página 1 - Microprocessor Supervisor

General DescriptionThe MAX16055 precision hex voltage microprocessor(µP) supervisory circuit monitors up to six system-sup-ply voltages and asserts a

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MAX16055Ultra-Small, Hex Voltage,Microprocessor Supervisor2 _______________________________________________________________________________________ABS

Página 3

MAX16055Ultra-Small, Hex Voltage,Microprocessor Supervisor_______________________________________________________________________________________ 3Not

Página 4

MAX16055Ultra-Small, Hex Voltage,Microprocessor Supervisor4 _______________________________________________________________________________________Typ

Página 5

RESET TIMEOUT DELAYMAX16055 toc09IN_1V/divRESET1V/div40ms/divMR-TO-RESET PROPAGATION DELAYMAX16055 toc10MR2V/divRESET2V/div40ns/divVIN = 3.3VMAX16055U

Página 6

MAX16055Ultra-Small, Hex Voltage,Microprocessor Supervisor6 _______________________________________________________________________________________IN1

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The MAX16055 is immune to short IN_ transients. Eachof the internal comparators provides a typical hystere-sis of 0.3% with respect to the reset thres

Página 8

Manual-Reset Input (MR)Many µP-based products require manual-reset capabil-ity. A logic-low on MR asserts RESET low. RESETremains asserted while MR is

Página 9

MAX16055Ultra-Small, Hex Voltage,Microprocessor SupervisorMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely em

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Rainbow-electronics MAX16055 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX16055. Rainbow Electronics MAX16055 User Manual Manual do Utilizador

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