General Description

The MAX6625/MAX6626 combine a temperature sensor,

compatible serial interface into single compact packages.

They convert their die temperatures into digital values

using internal analog-to-digital converters (ADCs). The

result of the conversion is held in a temperature register,

readable at any time through the serial interface. A dedi-

cated alarm output, OT, activates if the conversion result

exceeds the value programmed in the high-temperature

register. A programmable fault queue sets the number of

faults that must occur before the alarm activates, prevent-

ing spurious alarms in noisy environments. OT has pro-

grammable output polarity and operating modes.

The MAX6625/MAX6626 feature a shutdown mode that

saves power by turning off everything but the power-on

addresses can be configured with the ADD pin, allowing

up to four MAX6625/MAX6626 devices to be placed on

the same bus. The MAX6625P/MAX6626P OT outputs are

open drain, and the MAX6625R/MAX6626R OT outputs

include internal pullup resistors.

The MAX6625 has a 9-bit internal ADC and can function

as a replacement for the LM75 in most applications. The

MAX6626 has a 12-bit internal ADC. Both devices come

in the space-saving 6-pin SOT23 package.

Applications

Fan Control

Temperature Alarms

System Temperature Control

Industrial Equipment

Features

o 9-Bit Temperature-to-Digital Converter (MAX6625)

o 12-Bit Temperature-to-Digital Converter (MAX6626)

o Accuracy

±1.5°C (0°C to +50°C)

±2°C (0°C to +70°C)

±3°C (-40°C to +85°C)

±4°C (-55°C to +125°C)

o 133ms Conversion Time

o Up to Four Devices on a Single Bus

o Versatile Alarm Output with Programmable Trip

Temperature and Hysteresis

o Low-Power Shutdown Mode

o Space-Saving 6-Pin SOT23 Package

9-Bit/12-Bit Temperature Sensors with

________________________________________________________________ Maxim Integrated Products

1

GND

OT

SCL

16

5

ADD

SDA

MAX6625

MAX6626

SOT23-6

TOP VIEW

2

34

Pin Configuration

4

6

0.1

µF

1

MAX6625

MAX6626

3

SCL

MASTER

10k

(OMIT FOR MAX6625R

AND MAX6626R)

SDA

52

1k

1k

OT OUTPUT

Typical Operating Circuit

19-1841; Rev 2; 7/02

*For device options, see Selector Guide at end of data sheet.

Requires special solder temperature profile described in the

Absolute Maximum Ratings section.

Ordering Information

PART

TEMP. RANGE

PIN-PACKAGE

MAX6625PMUT-T*

-55

°C to +125°C

6 SOT23-6

MAX6625RMUT-T*

-55

°C to +125°C

6 SOT23-6

MAX6626PMUT-T*

-55

°C to +125°C

6 SOT23-6

MAX6626RMUT-T*

-55

°C to +125°C

6 SOT23-6

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.