MAX6635 Maxim Integrated Products, MAX6635 Datasheet

MAX6635

Manufacturer Part Number

MAX6635

Description

(MAX6633 - MAX6635) 12-Bit Plus Sign Temperature Sensors

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX6635.pdf (16 pages)

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The MAX6633/MAX6634/MAX6635 combine a tempera-

ture sensor, a programmable overtemperature alarm,

and an SMBus™/I

a single package. They convert their die temperatures

into digital values using internal analog-to-digital con-

verters (ADCs). The result of the conversion is then held

in a temperature register as a 12-bit + sign value, allow-

ing 0.0625°C resolution, readable at any time through

the serial interface. The devices are capable of reading

temperatures up to +150°C.

The MAX6633/MAX6634/MAX6635 feature a shutdown

mode that saves power by turning off everything except

the power-on reset (POR) and the serial interface. The

devices can be configured to separate addresses,

allowing multiple devices to be used on the same bus.

The MAX6633 has four address pins, allowing up to 16

devices to be connected to a single bus. The MAX6634

has three address pins, allowing up to eight devices to

be connected to a single bus. The MAX6635 has two

address pins, allowing up to four devices to be con-

nected to a single bus.

The MAX6633/MAX6634/MAX6635 make temperature

data available for transfer over the serial interface. The

MAX6634 incorporates a dual-mode ALERT output

(open drain) and can serve as an upgraded alternative

to the LM75. The MAX6635 includes an ALERT output

and an OVERT output (both open drain) and can func-

tion as an upgraded replacement for the LM76 in most

applications. The MAX6634/MAX6635 feature user-pro-

grammable temperature thresholds. All three devices

come in an 8-pin SO package.

19-2120; Rev 0; 8/01

Pin Configurations appear at end of data sheet.

SMBus is a trademark of Intel Corp.

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.

C is a trademark of Philips Corp.

Battery Temperature Alarms

PC Temperature Control

Automotive Equipment

12-Bit Plus Sign Temperature Sensors with

________________________________________________________________ Maxim Integrated Products

C™-compatible serial interface into

SMBus/I

General Description

Applications

C-Compatible Serial Interface

o +3V to +5.5V Supply Range

o Accuracy

o User-Programmable Temperature Thresholds

o User-Configurable Alarm Output(s)

o Ability to Respond to SMBus/I

o OVERT Output for System Shutdown (MAX6635)

o Multiple Devices per Bus

(MAX6634/MAX6635)

Response Address (MAX6634/MAX6635)

MAX6633MSA

MAX6634MSA

MAX6635MSA

±1°C max (0°C to +50°C)

±1.5°C max (-20°C to +85°C)

±2.5°C max (-40°C to +125°C)

±2.5°C typ (+150°C)

16 devices (MAX6633)

8 devices (MAX6634)

4 devices (MAX6635)

0.1µF

PART

A0 A1 GND

MAX6635

+3.0V TO +5.5V

OVERT

ALERT

SDA

SCL

Typical Operating Circuit

-55°C to +150°C

Ordering Information

TEMP. RANGE

10kΩ

1kΩ

C-Compatible Alert

1kΩ

PIN-PACKAGE

8 SO

Features

10kΩ

TO INTERRUPT

CONTROLLER

TO SYSTEM

SHUTDOWN

TO SMBus/I

MASTER

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