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MAX6338

Quad Voltage Monitor in µMAX Package

Maxim Integrated 

19-1695; Rev 2; 12/05

Quad Voltage Monitor in µMAX Package

General Description

The MAX6338 quad voltage monitor is capable of moni-

toring up to four supplies without any external compo-

nents. A variety of factory-trimmed threshold voltages

and supply tolerances are available to optimize the

MAX6338 for specific applications. The selection

includes input options for monitoring +5.0V, +3.3V,

+3.0V, +2.5V, +1.8V, and -5.0V voltages. An additional

high-input impedance comparator option can be used

as an adjustable voltage monitor, general-purpose com-

parator, or digital level translator.

Each of the monitored voltages is available with trip

thresholds to support power-supply tolerances of either

5% or 10% below the nominal voltage. An internal

bandgap reference ensures accurate trip thresholds

across the extended (-40°C to +85°C) operating temper-

ature range.

The MAX6338 consumes 25µA (typ) supply current and

operates with supply voltages from +2.5V to +5.5V. An

internal undervoltage lockout circuit forces all four digital

outputs low when VCC drops below the minimum operat-

ing voltage. The four digital outputs all have weak inter-

nal pull-ups to VCC, allowing wire-ORed connection.

Each input threshold voltage has an independent output.

The MAX6338 is available in a 10-pin µMAX® package.

________________________Applications

Telecommunications

High-End Printers

Desktop and Notebook Computers

Data Storage Equipment

Networking Equipment

Industrial Equipment

Set-Top Boxes

TOP VIEW

Pin Configuration

IN1 1

IN2 2

IN3 3

IN4 4

GND 5

MAX6338

10 VCC

9 OUT1

8 OUT2

7 OUT3

6 OUT4

Features

♦ Monitors Four Voltages (Factory Programmed or

User Adjustable)

+5.0V, +3.3V, +3.0V, +2.5V, +1.8V, -5.0V

(nominal) or User-Adjustable Settings

♦ Low 25µA Supply Current

♦ Four Independent, Open-Drain, Active-Low

Outputs

♦ +2.5V to +5.5V Supply Voltage Range

♦ Guaranteed from -40°C to +85°C

♦ No External Components Required

♦ Small 10-Pin µMAX Package

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX6338_UB*

-40°C to +85°C 10 µMAX

*Insert the desired letter from the Selector Guide into the blank

to complete the part number.

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

Specify lead free by adding the + symbol at the end of the part

number when ordering.

Selector Guide

PART

MAX6338AUB

MAX6338BUB

MAX6338CUB

MAX6338DUB

MAX6338EUB

MAX6338FUB

MAX6338GUB

MAX6338HUB

MAX6338IUB

MAX6338JUB

MAX6338KUB

MAX6338LUB

MAX6338MUB

MAX6338NUB

MAX6338OUB

MAX6338PUB

NOMINAL INPUT VOLTAGE

IN1

(V)

IN2

(V)

IN3

(V)

IN4

(V)

SUPPLY

TOLERANCE

(%)

5 3.3 2.5 Adj*

10

5 3.3 2.5† Adj*

5

5 3.3 1.8 Adj*

10

5 3.3 1.8† Adj*

5

5 3.0 2.5 Adj*

10

5 3.0 2.5† Adj*

5

5 3.0 1.8 Adj*

10

5 3.0 1.8† Adj*

5

5 3.3 2.5 1.8

10

5 3.3 2.5† 1.8†

5

Adj* 3.3 2.5 Adj*

10

Adj* 3.3 2.5† Adj*

5

5 3.0 Adj* -5

10

5 3.0 Adj* -5

5

5 3.3 Adj* -5

10

5 3.3 Adj* -5

5

µMAX

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

*Adjustable voltage based on +1.23V internal threshold. External

threshold voltage can be set using an external resistor-divider.

† Nominal input voltages for 1.8V and 2.5V are specified for 10%

tolerances

________________________________________________________________ Maxim Integrated Products 1

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.

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