General Description

The MAX6887/MAX6888 multivoltage supply supervi-

sors provide several voltage-detector inputs, one watch-

dog input, and three outputs. Each voltage-detector

input offers a factory-set undervoltage and overvoltage

threshold. Manual reset and margin disable inputs offer

additional flexibility.

The MAX6887 offers six voltage-detector inputs, while

the MAX6888 offers four inputs. Output RESET asserts

when any input voltage drops below its respective

undervoltage threshold or manual reset MR is asserted.

Output OV asserts when any input voltage exceeds its

respective overvoltage threshold. Monitor standard

supply voltages listed in the Selector Guide.

The MAX6887/MAX6888 offer a watchdog timer with an

initial and normal timeout periods of 102.4s and 1.6s,

respectively. Watchdog output WDO asserts when the

watchdog timer expires. Connect WDO to manual reset

input MR to generate resets when the watchdog timer

expires. RESET, OV, and WDO are active-low, open-

drain outputs.

The MAX6887/MAX6888 are available in a 5mm x 5mm

x 0.8mm, 16-pin thin QFN package and operate over

the extended -40°C to +85°C temperature range.

Applications

Multivoltage Systems

Telecom

Networking

Servers/Workstations/Storage Systems

Features

♦ Hex/Quad Voltage Detectors

♦ Undervoltage and Overvoltage Thresholds

♦ 1% Threshold Accuracy

♦ Margining Disable and Manual Reset Input

♦ Watchdog Timer

♦ Open-Drain RESET, OV, and WDO Outputs

♦ 180ms (min) Reset Timeout Period

♦ Few External Components

♦ Small 5mm x 5mm, 16-Pin Thin QFN Packages

Hex/Quad, Power-Supply Supervisory Circuits

________________________________________________________________ Maxim Integrated Products

1

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX6887_ETE

-40°C to +85°C

16 Thin QFN

T1655-2

MAX6888_ETE

-40°C to +85°C

16 Thin QFN

T1655-2

Ordering Information

Selector Guide

19-0291; Rev 1; 3/07

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.

Pin Configurations and Typical Operating Circuit appear at

end of data sheet.

Note: Insert the desired letter from the Selector Guide into the

blank to complete the part number.

NOMINAL INPUT VOLTAGE (V)*

PART

IN1

IN2

IN3

IN4

IN5

IN6

TOL

(%)

MAX6887AETE

5.0

3.3

2.5

1.8

Adj

Adj

5

MAX6887BETE

5.0

3.3

2.5

Adj

Adj

Adj

5

MAX6887CETE

5.0

3.3

1.8

Adj

Adj

Adj

5

MAX6887DETE

3.3

2.5

1.8

1.5

Adj

Adj

5

MAX6887EETE

3.3

2.5

1.8

Adj

Adj

Adj

5

MAX6887FETE

3.3

2.5

1.5

Adj

Adj

Adj

5

MAX6887GETE 3.3

2.5

Adj

Adj

Adj

Adj

5

MAX6887HETE

3.3

1.8

Adj

Adj

Adj

Adj

5

MAX6887QETE

Adj

Adj

Adj

Adj

Adj

Adj

5

NOMINAL INPUT VOLTAGE (V)*

PART

IN1

IN2

IN3

IN4

IN5

IN6

TOL

(%)

MAX6887IETE

5.0

3.3

2.5

1.8

Adj

Adj

10

MAX6887JETE

5.0

3.3

2.5

Adj

Adj

Adj

10

MAX6887KETE

5.0

3.3

1.8

Adj

Adj

Adj

10

MAX6887LETE

3.3

2.5

1.8

1.5

Adj

Adj

10

MAX6887METE 3.3

2.5

1.8

Adj

Adj

Adj

10

MAX6887NETE

3.3

2.5

1.5

Adj

Adj

Adj

10

MAX6887OETE 3.3

2.5

Adj

Adj

Adj

Adj

10

MAX6887PETE

3.3

1.8

Adj

Adj

Adj

Adj

10

MAX6887RETE

Adj

Adj

Adj

Adj

Adj

Adj

10

*See thresholds options tables (Tables 1 and 2) for actual undervoltage and overvoltage thresholds.

Selector Guides continued at end of data sheet.