General Description

The MAX6511/MAX6512/MAX6513 are fully integrated,

remote temperature switches that use an external P-N

junction (typically a diode-connected transistor) as the

sensing element to measure the remote temperature.

These devices assert a logic signal when the tempera-

ture crosses a factory-programmed threshold. Available

trip thresholds are from +45°C to +125°C in 10°C incre-

table to 5°C or 10°C.

The MAX6511 has an active-low CMOS output and the

MAX6513 has an active-high CMOS output. The

MAX6512 has an open-drain output. The output is

asserted when the temperature exceeds the threshold

value. The active-low open-drain output is intended to

interface with a microprocessor (µP) reset or interrupt

input. The active-high CMOS output can directly drive a

power FET to control a cooling fan.

The MAX6511/MAX6512/MAX6513 operate from a

+3.0V to +5.5V supply and typically consume 400µA of

supply current. They are available in the small 6-pin

SOT23. The MAX6513 is also available in a 6-pin lead-

free TDFN package.

________________________Applications

CPU Temperature Monitoring in High-Speed

Computers

Multichip Modules

Battery Packs

Temperature Control

Temperature Alarms

Fan Control

Features

♦ Continuously Measure External Junction

Temperature

♦ Factory-Programmed Temperature Threshold from

+45°C to +125°C in 10°C Increments

♦ Insensitive to Series Parasitic Resistance

♦ Active-Low CMOS Output (MAX6511) or Open-Drain

Output for Overtemperature Alarm (MAX6512) or

Active-High Output (MAX6513) for Direct Fan Control

♦ <100ms Response Time

♦ Accuracy

±3°C (TREMOTE = +45°C to +125°C, TA = -5°C to +55°C)

±5°C (TREMOTE = +45°C to +125°C, TA = -40°C to +85°C)

♦ Pin-Selectable 5°C or 10°C Hysteresis

♦ 400µA Average Current Consumption

♦ +3.0V to +5.5V Supply Range

♦ 6-Pin SOT23 Package

♦ 6-Pin TDFN Package (Lead Free)

Low-Cost, Remote SOT Temperature Switches

________________________________________________________________ Maxim Integrated Products

1

GND

TOVER (TOVER)

HYST

16

DXP

5

DXN

MAX6511

MAX6512

MAX6513

TOP VIEW

2

34

( ) ARE FOR MAX6513 SOT23 ONLY.

Pin Configuration

19-1819; Rev 2; 10/04

Ordering Information

*These parts are offered in nine standard temperature versions

with a minimum order of 2500 pieces. To complete the suffix

information, select an available trip point in degrees centigrade

from the device marking codes table. For example, the

MAX6511UT065-T describes a MAX6511 in a 6-pin SOT23

package with a +65°C threshold.

PART*

TEMP RANGE

PIN-

PACKAGE

OUTPUT

MAX6511UT_ _ _ -T

-40

°C to +85°C6 SOT23-6

CMOS

(active low)

MAX6512UT_ _ _ -T

-40

°C to +85°C6 SOT23-6 Open-drain

-40

°C to +85°C 6 TDFN

MAX6513_T_ _ _ -T

-40

°C to +85°C6 SOT23-6

CMOS

(active high)

Typical Operating Circuit appears at end of data sheet.

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.