LM75BIM-3+ Maxim Integrated Products, LM75BIM-3+ Datasheet

IC TEMP SENSOR WATCHDOG 8SOIC

LM75BIM-3+

Manufacturer Part Number
LM75BIM-3+
Description
IC TEMP SENSOR WATCHDOG 8SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of LM75BIM-3+

Function
Temp Sensor, Watchdog
Topology
ADC (Sigma Delta), Comparator, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 125°C
Output Type
I²C™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The LM75 temperature sensor includes a delta-sigma
analog-to-digital converter, and a digital overtempera-
ture detector. The host can query the LM75 through its
I
open-drain overtemperature output (OS) sinks current
when the programmable temperature limit is exceeded.
The OS output operates in either of two modes, com-
parator or interrupt. The host controls the temperature
at which the alarm is asserted (T
temperature below which the alarm condition is not
valid (T
ters can be read by the host. The address of the LM75
is set with three pins to allow multiple devices to work
on the same bus. Power-up is in comparator mode, with
defaults of T
to 5.5V supply voltage range, low supply current, and
I
tions in thermal management and protection.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Note: Devices are specified over the -55°C to +125°C temperature range and include I
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
19-4385; Rev 0; 3/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
2
2
LM75BIM-3+
LM75BIMX-3+
LM75BIMM-3+
LM75BIMMX-3+
LM75BIM-5+
LM75BIMX-5+
LM75BIMM-5+
LM75BIMMX-5+
C interface to read temperature at any time. The
C interface make the LM75 ideal for many applica-
Thermal System Management
Thermal Protection
Test Equipment
Computers and Office Electronics
HYST
PART
TOP VIEW
OS
). Also, the LM75’s T
= +80°C and T
GND
SDA
SCL
OS
________________________________________________________________ Maxim Integrated Products
Digital Temperature Sensor and Thermal
1
2
3
4
μMAX (μSOP), SO
+
General Description
PIN-PACKAGE
8 SO (SOP)
8 SO (SOP)
8 µMAX (µSOP)
8 µMAX (µSOP)
8 SO (SOP)
8 SO (SOP)
8 µMAX (µSOP)
8 µMAX (µSOP)
LM75
Pin Configuration
HYST
OS
OS
7
5
8
6
Applications
) and the hysteresis
= +75°C. The 3.0V
+V
A0
A1
A2
and T
S
Watchdog with 2-Wire Interface
HYST
regis-
PKG
Bulk
Bulk
Bulk
Bulk
T&R
T&R
T&R
T&R
Ordering Information/Selector Guide
♦ SO (SOP) and µMAX
♦ I
♦ Separate Open-Drain OS Output Operates as
♦ Register Readback Capability
♦ Power-Up Defaults Permit Stand-Alone Operation
♦ 3.0V to 5.5V Supply Voltage
♦ Low Operating Supply Current 250µA (typ), 1mA
♦ 4µA (typ) Shutdown Mode Minimizes Power
♦ Up to Eight LM75s Can Be Connected to a Single
♦ Pin- and/or Register-Compatible with Improved-
A0
A1
A2
Interrupt or Comparator/Thermostat Input
as a Thermostat
(max)
Consumption
Bus
Performance Maxim Sensors Including MAX7500,
MAX6625, MAX6626, DS75LV, and DS7505
2
7
6
5
SUPPLY VOLTAGE (V)
C Bus Interface
TEMPERATURE
BANDGAP
SILICON
SENSOR
CONFIGURATION
REGISTER
3.3
3.3
3.3
3.3
5.0
5.0
5.0
5.0
8
9-BIT DELTA-
SIGMA ADC
2
C noise filter.
16
REGISTER
2-WIRE INTERFACE
POINTER
®
Functional Diagram
4
8
8
(µSOP) Packages
+V
TOS SET POINT
S
REGISTER
= 3.0V to 5.5V
16
16
16
POINT REGISTER
T
HYST
COMPARATOR W/
TOP MARK
LM75BIM-3
LM75BIM-3
LM75BIM-5
LM75BIM-5
HYSTERESIS
SET POINT
16
SET
T01B
T01B
T00B
T00B
Features
3
1
2
SDA
SCL
OS
1

Related parts for LM75BIM-3+

LM75BIM-3+ Summary of contents

Page 1

... TOP VIEW + SDA 1 SCL 2 7 LM75 OS 3 GND 4 5 μMAX (μSOP), SO PART PIN-PACKAGE LM75BIM- (SOP) LM75BIMX- (SOP) LM75BIMM-3+ 8 µMAX (µSOP) LM75BIMMX-3+ 8 µMAX (µSOP) LM75BIM- (SOP) LM75BIMX- (SOP) LM75BIMM-5+ 8 µMAX (µSOP) LM75BIMMX-5+ 8 µMAX (µSOP) Note: Devices are specified over the -55°C to +125°C temperature range and include I + Denotes a lead(Pb)-free/RoHS-compliant package. T& ...

Page 2

Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface ABSOLUTE MAXIMUM RATINGS (Note GND ...........................................................-0.3V to +6.0V S OS, SDA, SCL to GND...........................................-0.3V to +6.0V All Other Pins to GND .................................-0.3V to (+V Input Current at Any ...

Page 3

... SCL to 10% of SDA 90% of SCL to 90% of SDA (Note 14) = +25°C. Values over the temperature range are guaranteed by design +5VDC for LM75BIM-5 and LM75BIMM-5 and +V S (load capacitance) on output lines = 80pF, unless otherwise specified. L causes the device to reset SDA to the IDLE state of the TIMEOUT = 3.3V for versions with “ ...

Page 4

Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface (T = +25°C, unless otherwise noted.) A QUIESCENT SUPPLY CURRENT vs. TEMPERATURE 300 290 280 +V = +5V S 270 260 +V = +3V S 250 240 230 -55 -25 5 ...

Page 5

Digital Temperature Sensor and Thermal Detailed Description The LM75 temperature sensor measures temperature and converts the data into digital form using a band- gap type temperature sensor and a 9-bit delta-sigma 2 ADC C-compatible 2-wire serial interface allows ...

Page 6

Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface SDA t SU:DAT t LOW SCL t HIGH t HD:STA START CONDITION (S) PARAMETERS ARE MEASURED FROM 10% TO 90%. Figure 2. Serial Bus Timing Table 3. ...

Page 7

Digital Temperature Sensor and Thermal 2 Figure 4. I C-Compatible Timing Diagram (Read) _______________________________________________________________________________________ Watchdog with 2-Wire Interface 7 ...

Page 8

Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface 2 Figure 5. I C-Compatible Timing Diagram (Write) 8 _______________________________________________________________________________________ ...

Page 9

Digital Temperature Sensor and Thermal Temperature Data Format Temperature data is stored in the Temperature, T Point, and T Set Point registers. The temperature HYST data format is 9 bits, two’s complement, and the register is read out in 2 ...

Page 10

Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface Table 5. Configuration Register Definition Configuration Register The 8-bit Configuration register sets the fault queue, OS polarity, shutdown control, and whether the OS output functions in comparator ...

Page 11

Digital Temperature Sensor and Thermal GND A0 10kΩ 10kΩ 10kΩ SCL SCL SDA SDA TO Microcontroller OS 2 Figure Controlled Temperature Sensor 3V to 5.5V R1 10kΩ ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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