General Description

The MAX6505–MAX6508 temperature switches have dual

logic outputs that assert when the die temperature cross-

es their trip thresholds. Trip thresholds are factory pro-

grammed to convenient temperatures in 5°C increments.

The MAX6505/MAX6506 have an ALARM output that

asserts when the temperature is above the factory-pro-

grammed thresholds (available from -40°C to +125°C).

They also have a WARN output that asserts when the

temperature is several degrees below the ALARM thresh-

old. The difference between the ALARM and WARN

thresholds (

+20°C, or +30°C. The MAX6505’s logic outputs are open

drain, while the MAX6506’s logic outputs are push-pull.

The MAX6507 has open-drain outputs (OVER, OK), and

the MAX6508 has push-pull outputs (OVER, OK), each

with two factory-programmed threshold temperatures

(TOVER and TUNDER) in the wide range of -40°C to

+125°C. The overtemperature output asserts when the

temperature is above TOVER. When the temperature is in

the desired window (less than TOVER and greater than

TUNDER), OK (OK) asserts.

The MAX6505–MAX6508 are accurate to ±0.5

°C (typ),

±5.5

°C (max). Operating from a +2.5V to +5.5V supply,

these low-cost devices typically consume 30µA supply

current and require no external components for setting

trip points. The MAX6505–MAX6508 are available in a 6-

pin SOT23 package.

________________________Applications

µP Temperature Monitoring in High-Speed

Computers

Temperature Control

Temperature Alarms

Fan Control

Features

o ±0.5°C (typ) Threshold Accuracy Over Full

Temperature Range

o No External Components Required

o Low Cost

o 30µA (typ) Supply Current

o Factory-Programmed Thresholds from -40°C to

+125°C in 5°C Increments

o Open-Drain Outputs (MAX6505/MAX6507),

Push-Pull Outputs (MAX6506/MAX6508)

o Pin Selectable +2°C, +10°C Hysteresis

(MAX6507/MAX6508)

o Pin Selectable +5°C, +10°C, +20°C, +30°C

o SOT23-6 Package

*To complete the suffix information for the MAX6505/

MAX6506, add P or N for positive or negative trip tempera-

ture, and select an available trip point in degrees centigrade.

For example, the MAX6505UTP055-T describes a MAX6505 in

a SOT23-6 package with a +55°C threshold (Table 3). Contact

the factory for pricing and availability of temperature versions

(minimum order 10,000 pieces).

**To complete the suffix information for MAX6507/MAX6508,

see Table 4.

Dual Trip SOT Temperature Switches

________________________________________________________________ Maxim Integrated Products

1

Pin Configurations

19-1712; Rev 1; 4/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Ordering Information

PART

TEMP. RANGE

PIN-

PACKAGE

MAX6505UT_ _ _ _-T*

-40°C to +125°C

6 SOT23-6

MAX6506UT_ _ _ _-T*

-40°C to +125°C

6 SOT23-6

MAX6507UT_ _ _ _-T**

-40°C to +125°C

6 SOT23-6

MAX6508UT_ _ _ _-T**

-40°C to +125°C

6 SOT23-6

Selector Guide appears at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

TOP VIEW

GND

S1

16

5

S0

MAX6505

MAX6506

SOT23-6

2

34

WARN

(WARN)

ALARM

(ALARM)

( ) ARE FOR MAX6506.

GND

S0

16

5

N.C.

MAX6507

MAX6508

SOT23-6

2

34

OK

(OK)

OVER

(OVER)

( ) ARE FOR MAX6508.