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General Description

The MAX6576/MAX6577 are low-cost, low-current tem-

perature sensors with a single-wire output. The MAX6576

converts the ambient temperature into a square wave

with a period proportional to absolute temperature (°K).

The MAX6577 converts the ambient temperature into a

square wave with a frequency proportional to absolute

temperature. The MAX6576 offers accuracy of ±3°C at

+25°C, ±4.5°C at +85°C, and ±5°C at +125°C. The

MAX6577 offers accuracy of ±3°C at +25°C, ±3.5°C at

+85°C, and ±4.5°C at +125°C.

Both devices feature a single-wire output that minimizes

the number of pins necessary to interface with a micro-

processor. The period/frequency range of the output

square wave can be selected by hard-wiring the two

MAX6576/MAX6577 are available in space-saving 6-pin

SOT23 packages.

Applications

Critical µP and µC Temperature Monitoring

Portable Battery-Powered Equipment

Cell Phones

Battery Packs

Hard Drives/Tape Drives

Networking and Telecom Equipment

Medical Equipment

Automotive

Features

o Simple Single-Wire Output

o Two Output Types Available

Temperature to Period (µs) (MAX6576)

Temperature to Frequency (Hz) (MAX6577)

o ±0.8°C Accuracy at +25°C (±3°C max)

o No External Components

o Operates from +2.7V to +5.5V Supply Voltage

o Low 140µA Typical Supply Current

o Standard Operating Temperature Range:

-40°C to +125°C

o Small 6-Pin SOT23 Package

SOT Temperature Sensors with

Period/Frequency Output

________________________________________________________________

Maxim Integrated Products

1

+2.7V TO +5.5V

GND

TS0

TS1

OUT

0.1

µF

0.1

µF

MAX6576

MAX6577

µP

GND

I/O

19-1484; Rev 0; 4/99

PART

MAX6576ZUT

MAX6577ZUT -40°C to +125°C

-40°C to +125°C

TEMP. RANGE

PIN-

PACKAGE

6 SOT23

6 SOT23

Typical Operating Circuit

Ordering Information

SOT

TOP MARK

AABI

AABJ

GND

TS0

N.C.

16

OUT

5

TS1

MAX6576

MAX6577

SOT23-6

TOP VIEW

2

34

Pin Configuration