Rainbow-electronics MAX6635 Manual de usuario descargar pdf (Pagina 1)

General Description

The MAX6633/MAX6634/MAX6635 combine a tempera-

ture sensor, a programmable overtemperature alarm,

and an SMBus™/I

C™-compatible serial interface into

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.

Applications

Battery Temperature Alarms

PC Temperature Control

Automotive Equipment

Features

♦ +3V to +5.5V Supply Range

♦ Accuracy

±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)

♦ User-Programmable Temperature Thresholds

(MAX6634/MAX6635)

♦ User-Configurable Alarm Output(s)

(MAX6634/MAX6635)

♦ Ability to Respond to SMBus/I

C-Compatible Alert

Response Address (MAX6634/MAX6635)

♦ OVERT Output for System Shutdown (MAX6635)

♦ Multiple Devices per Bus

16 devices (MAX6633)

8 devices (MAX6634)

4 devices (MAX6635)

MAX6633/MAX6634/MAX6635

12-Bit Plus Sign Temperature Sensors with

SMBus/I

C-Compatible Serial Interface

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2120; Rev 0; 8/01

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.

PART TEMP. RANGE PIN-PACKAGE

MAX6633MSA -55°C to +150°C 8 SO

MAX6634MSA -55°C to +150°C 8 SO

MAX6635MSA -55°C to +150°C 8 SO

SMBus is a trademark of Intel Corp.

C is a trademark of Philips Corp.

SCL

SDA

TO SYSTEM

SHUTDOWN

A0 A1 GND

+3.0V TO +5.5V

0.1µF

ALERT

OVERT

MAX6635

467

10kΩ 1kΩ 1kΩ 10kΩ

TO INTERRUPT

CONTROLLER

TO SMBus/I

MASTER

Typical Operating Circuit

Pin Configurations appear at end of data sheet.

1 2 3 4 5 6 ... 15 16

Indice de contenidos

Pagina 1 - C-Compatible Serial Interface

General DescriptionThe MAX6633/MAX6634/MAX6635 combine a tempera-ture sensor, a programmable overtemperature alarm,and an SMBus™/I2C™-compatible seria

Pagina 2

MAX6633/MAX6634/MAX6635bit. Registers THIGHand TLOWare 16 bits, read/write,and contain values that trigger ALERT and OVERT.Register THYSTis 16 bits, r

Pagina 3

Temperature Alert (MAX6634/MAX6635)ALERT has programmable polarity and two modes:comparator and interrupt. Polarity and mode are select-ed through the

Pagina 4

MAX6633/MAX6634/MAX6635and the serial interface. Enter shutdown by program-ming the shutdown bit of the Configuration registerhigh. While in shutdown,

Pagina 5

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface_________________________________________________

Pagina 6

MAX6633/MAX6634/MAX6635D6 to D0: Reads all zeros, cannot be written.1LSB = 1°C.Power-On Default: THIGH= +64°C (2000h), TLOW= +10°C (0500h), TMAX= +80°

Pagina 7

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface_________________________________________________

Pagina 8

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial InterfaceMaxim cannot assume responsibility for use of any

Pagina 9

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface2 _______________________________________________

Pagina 10

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface_________________________________________________

Pagina 11

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface4 _______________________________________________

Pagina 12

Detailed DescriptionThe MAX6633/MAX6634/MAX6635 continuously con-vert their die temperatures into digital values using theirintegrated ADCs. The resul

Pagina 13

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface6 _______________________________________________

Pagina 14

The Configuration register is 8 bits, read/write, andcontains the SMBus timeout disable bit, fault queueenable bit, the temperature alarm output polar

Pagina 15

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface8 _______________________________________________

Pagina 16

MAX6633/MAX6634/MAX663512-Bit Plus Sign Temperature Sensors withSMBus/I2C-Compatible Serial Interface_________________________________________________

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