FM75M8

FM75M8 Datasheet


FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm

Part Datasheet
FM75M8 FM75M8 FM75M8 (pdf)
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FM75M8X FM75M8X FM75M8X
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FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm

December 2006

FM75 tm

Low-Voltage Two-Wire Digital Temperature Sensor with

Thermal Alarm
• User Configurable to 9, 10, 11 or 12-bit Resolution
• Precision Calibrated to ±1°C, 0°C to 100°C

Typical
• Temperature Range -40°C to 125°C
• Low Operating Current less than 250µA
• Low Self Heating 0.2°C max. in still air
• Operating Voltage Range 2.7V to 5.5V
• Battery Management
• FAX Management
• Printers
• Portable Medical Instruments
• HVAC Systems
• Power Supply Modules
• Disk Drives
• Computers
• Automotive Components

The FM75 contains a high-precision CMOS temperature sensor, a Delta-Sigma analog-to-digital converter, and a SMBus-compatible serial digital interface. Typical accuracy is ±2°C over the full temperature range of 40°C to 125°C and to ±1°C over the range of 0°C to 100°C, with 9- to 12-bit resolution default is

Thermal alarm output, over-limit signal OS supports interrupt and comparator modes. OS is active if the userprogrammable trip-temperature is exceeded. When the temperature falls below the trip temperature, plus the user-programmable hysteresis limit, the OS is disabled.

Available in a surface mount SOIC-8 SOP-8 package.

Application Diagram
to 5.5V

User Programmable

Address

SMBus SDA 1

Interface

FM75
8-Pin Configuration

Figure Typical Application Diagram
Ordering Information

Part Number FM75M8x

Package 8-Lead SOIC

Temperature Range -40°C to +125°C

Packing Method 2500 Units, Tape and Reel

FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm

Pin Assignments

FM75

Pin Descriptions

Pin # 1 2 3

Name SDA SCL OS
4 5, 6, 7

GND A0, A1, A2

Figure Pin Assignments

Direction Input/Output

Input Output

Supply Input

Supply

Serial Data. Open drain to I/O-data pin for two-wire interface. Serial Clock. Clock for two-wire serial interface. Over-Limit Signal. Open drain thermostat output that indicates if the temperature exceeds user-programmable limits. Default is active LOW. Ground Address Least Significant Bits LSBs . User selectable address pins for the three LSBs of the serial interface address. Supply Voltage
2006 Fairchild Semiconductor Corporation

FM75 Low-Voltage Two-Wire Digital Temperature Sensor with Thermal Alarm

Absolute Maximum Ratings

The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions for actual device operation.

Parameter Supply Voltage Output Voltage Output Current Storage Temperature Range Lead Soldering Temperature ESD 1

Human Body Model Machine Model

Min. -60

Typ.

Max. +7

VCC + 10
+150 220

Units V mA °C °C
2000

Note Human Body Model 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Machine Model 200pF
capacitor discharged directly into each pin.

Electrical Characteristics 2
-40°C ð TA ð +125°C, VCC = 5.0V unless otherwise noted. Specifications are subject to change without notice.

Symbol Parameter

Conditions

Min. Typ. Max. Units

TMIN, TMAX

Specified Temperature Range Temperature Conversion Time 3
More datasheets: SRP1055-R36Y | SRP1055-1R4M | SRP1055-R80M | SRP1055-2R2M | SRP1055-4R3M | SRP1055-8R8M | SRP1055-7R2M | SRP1055-4R5M | B65811J0040A041 | FDW264P


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Datasheet ID: FM75M8 514876