MAX6634MSA+T Maxim Integrated Products, MAX6634MSA+T Datasheet

IC TEMP SENSOR SMBUS 8-SOIC

MAX6634MSA+T

Manufacturer Part Number
MAX6634MSA+T
Description
IC TEMP SENSOR SMBUS 8-SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6633MSA.pdf (16 pages)

Specifications of MAX6634MSA+T

Function
Temp Monitoring System (Sensor)
Topology
ADC, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 150°C
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-55°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Full Temp Accuracy
+/- 2.5 C
Digital Output - Bus Interface
Serial (3-Wire, I2C)
Digital Output - Number Of Bits
12 bit + Sign
Maximum Operating Temperature
+ 150 C
Minimum Operating Temperature
- 55 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
I
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.
2
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
2
C™-compatible serial interface into
SMBus/I
General Description
Applications
2
C-Compatible Serial Interface
♦ +3V to +5.5V Supply Range
♦ Accuracy
♦ User-Programmable Temperature Thresholds
♦ User-Configurable Alarm Output(s)
♦ Ability to Respond to SMBus/I
♦ OVERT Output for System Shutdown (MAX6635)
♦ Multiple Devices per Bus
(MAX6634/MAX6635)
(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
7
V
CC
V
CC
8
6
+3.0V TO +5.5V
OVERT
ALERT
SDA
SCL
Typical Operating Circuit
4
5
1
2
3
-55°C to +150°C
-55°C to +150°C
-55°C to +150°C
Ordering Information
TEMP. RANGE
10kΩ
1kΩ
2
C-Compatible Alert
1kΩ
PIN-PACKAGE
8 SO
8 SO
8 SO
Features
10kΩ
TO INTERRUPT
CONTROLLER
TO SYSTEM
SHUTDOWN
TO SMBus/I
MASTER
2
C
1

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MAX6634MSA+T Summary of contents

Page 1

... Pin Configurations appear at end of data sheet. SMBus is a trademark of Intel Corp trademark of Philips Corp. ________________________________________________________________ Maxim Integrated Products 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. 2 C-Compatible Serial Interface ♦ +3V to +5.5V Supply Range ♦ ...

Page 2

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface ABSOLUTE MAXIMUM RATINGS V , SDA, SCL ......................................................-0.3V to +6.0V CC All Other Pins ................................................-0. SDA, ALERT, OVERT Current .............................-1mA to +50mA ESD Protection (Human Body Model)................................2000V ...

Page 3

Plus Sign Temperature Sensors with SMBus/I ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V -55°C to +125°C, unless otherwise noted. Typical values are wise noted.) PARAMETER SYMBOL SMBus TIMING (Note 3, Figures 1, 2, ...

Page 4

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface (V = +3.3V +25°C, unless otherwise noted SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE +5. +3.3V CC ...

Page 5

Plus Sign Temperature Sensors with SMBus/I PIN MAX6633 MAX6634 MAX6635 — — — — — — ...

Page 6

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface Write Byte Format S ADDRESS WR 7 bits Slave Address: equivalent to chip-select line wire interface Write Word Format S ADDRESS WR 7 bits Slave Address: ...

Page 7

Plus Sign Temperature Sensors with SMBus HIGH LOW SMBCLK SMBDATA SU:STA HD:STA SU:DAT A = START CONDITION B = MSB OF ADDRESS CLOCKED INTO SLAVE C = LSB OF ADDRESS CLOCKED ...

Page 8

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface CONFIGURATION Figure 6. MAX6634 Functional Diagram CONFIGURATION Figure 7. MAX6635 Functional Diagram 8 _______________________________________________________________________________________ V CC CMP 12 BIT + SIGN ADC CMP TEMPERATURE T T LOW HIGH SMBus ...

Page 9

Plus Sign Temperature Sensors with SMBus/I TEMPERATURE (READ ONLY) POINTER = 00h T SET POINT HYST (READ/WRITE) POINTER = 02h (MAX6634/MAX6635 ONLY) T SET POINT LOW (READ/WRITE) POINTER = 04h (MAX6634/MAX6635 ONLY) Figure 8. MAX6633/MAX6634/MAX6635 Programmer’s Model _______________________________________________________________________________________ 2 ...

Page 10

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface T MAX MAX HYST T HIGH HIGH HYST LOW HYST T LOW ALERT COMPARATOR MODE ALERT INTERRUPT MODE * OVERT ...

Page 11

Plus Sign Temperature Sensors with SMBus +3V TO +5.5V 8 RELAY 4kΩ 5VDC, 20mA 125VAC, 1A MAX6634 3 2N3904 ALERT 4 Figure 10. Simple Thermostat Temperature Alert (MAX6634/MAX6635) ALERT has programmable polarity and two modes: comparator and ...

Page 12

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface and the serial interface. Enter shutdown by program- ming the shutdown bit of the Configuration register high. While in shutdown, the Temperature register retains the last conversion result and ...

Page 13

Plus Sign Temperature Sensors with SMBus/I Table 2. Pointer Register Bit Assignments ADDRESS DESCRIPTION Temperature register 00h (READ only) Configuration-Byte 01h register 02h T register HYST 03h T register MAX 04h T register LOW 05h T register HIGH Table ...

Page 14

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface Table 5. Fault Queue Depth D4 NO. OF FAULTS 0 1 Table 6. Output Code vs. Temperature DIGITAL OUTPUT CODE TEMP. (°C) BINARY MSB +150.0000 0100 1011 0000 0XXX ...

Page 15

Plus Sign Temperature Sensors with 2 SMBus/I C-Compatible Serial Interface TOP VIEW SDA SDA SCL SCL MAX6633 ALERT GND GND ______________________________________________________________________________________ ...

Page 16

... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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