Thermal Supervisor. MIC184 Datasheet

MIC184 Supervisor. Datasheet pdf. Equivalent

MIC184 Datasheet
Recommendation MIC184 Datasheet
Part MIC184
Description Local/Remote Thermal Supervisor
Feature MIC184; MIC184 MIC184 Micrel Local/Remote Thermal Supervisor General Description The MIC184 is a versati.
Manufacture Micrel Semiconductor
Datasheet
Download MIC184 Datasheet




Micrel Semiconductor MIC184
MIC184
MIC184
Micrel
Local/Remote Thermal Supervisor
General Description
The MIC184 is a versatile digital thermal supervisor capable
of measuring temperature using either its own internal sensor
or an inexpensive external sensor. A 2-wire serial interface is
provided to allow communication with either I2C or SMBus
masters. This device is a pin-for-pin and software compatible
upgrade for the industry standard LM75.
Additional features include remote temperature measurement
capability, and interrupt status and mask bits in the chip’s
configuration register for software polling. The open-drain
interrupt output pin can be used as either an overtemperature
alarm or thermostatic control signal. Three programmable ad-
dress pins permit users to multidrop up to 8 devices along the
2-wire bus, allowing simple distributed temperature sensing
networks. Superior performance, low power and small size
makes the MIC184 an excellent choice for the most demand-
ing thermal management applications.
Features
• Measures local and remote temperatures
• Pin and software backward compatible to LM75
• 9-bit sigma-delta ADC
• 2-wire I2C/SMBus compatible interface
• Programmable thermostatic settings for either internal or
external zone
• Open-drain comparator/interrupt output pin
• Interrupt mask and status bits
• Low-power shutdown mode
• Fail-safe response to diode faults
• 2.7V to 5.5V power supply range
• Up to 8 devices may share the same bus
• 8-Lead SOP and MSOP Packages
Applications
• Desktop, Server and Notebook Computers
• Printers and Copiers
• Test and measurement equipment
• Consumer electronics
Ordering Information
Part Number
MIC184BM
MIC184BMM
MIC184YM
MIC184YMM
Temperature Range
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
Package Pb-FREE
8-lead SOIC
8-lead MSOP
8-lead SOIC
X
8-lead MSOP
X
Typical Application
3.0V to 3.6V
VDD
Data 10k
Clock
Interrupt
FROM
SERIAL BUS
HOST
MIC184
8 VDD
A2/T1 5
1 DATA
A1 6
2 CLK
A0 7
3 INT
GND 4
0.1µF
ceramic
2200pF
OPTIONAL
REMOTE
TEMPERATURE
SENSOR
2-Channel SMBus Temperature Measurement System
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2006
1
MIC184



Micrel Semiconductor MIC184
MIC184
Pin Configuration
DATA 1
CLK 2
INT 3
GND 4
8 VDD
7 A0
6 A1
5 A2/T1
Micrel
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
DATA
CLK
INT
GND
A2/T1
A1
A0
VDD
Pin Function
Data (Digital I/O): Open-drain. Serial data input/output.
Clock (Digital Input): The host provides the serial bit clock on this input.
Interrupt (Digital Output): Open-drain. Interrupt or thermostat output.
Ground: Power and signal return for all IC functions.
Address Bit 2 (Digital Input): Slave address selection input. See “Slave Ad-
dress Truth Table.”
Temperature Sensor 1 (Analog Input): Input from remote temperature sensor
(diode junction).
Address Bit 1 (Digital Input): Slave address selection input. See “Slave Ad-
dress Truth Table.”
Address Bit 0 (Digital Input): Slave address selection input. See “Slave Ad-
dress Truth Table.”
Supply (Analog Input): Power supply input to the IC.
MIC184
2 May 2006



Micrel Semiconductor MIC184
MIC184
Absolute Maximum Ratings (Note 1)
Power Supply Voltage, VDD.......................................... 6.0V
Voltage on Any Pin ................................ –0.3V to VDD+0.3V
Current Into Any Pin ................................................... ±6mA
Power Dissipation, TA = +125°C................................ 30mW
Junction Temperature .............................................. +150°C
Storage Temperature................................ –65°C to +150°C
ESD Ratings (Note 3)
Human Body Model ..................................................... 700V
Machine Model ............................................................ 100V
Soldering
Vapor Phase (60 sec.) .............................. +220°C +5–0°C
Infrared (15 sec.) ...................................... +235°C +5–0°C
Micrel
Operating Ratings (Note 2)
Power Supply Voltage, VDD......................... +2.7V to +5.5V
Ambient Temperature Range (TA) ............. -55°C to +125°C
Package Thermal Resistance (θJA)
SOP ................................................................. +152°C/W
MSOP .............................................................. +206°C/W
Electrical Characteristics
2.7V ≤ VDD ≤ 5.5; TA = +25°C, bold values indicate –55°C ≤ TA ≤ +125°C, Note 4; unless noted.
Symbol
Parameter
Condition
Power Supply
IDD Supply Current
INT open, A2, A1, A0 = VDD or GND,
CLK = DATA = high, normal mode
shutdown mode, CLK = 100kHz
INT open, A2, A1, A0 = VDD or GND,
CLK = DATA = high, shutdown mode
tPOR
VPOR
Power-On Reset Time
Power-On Reset Voltage
VDD > VPOR
all registers reset to default values,
A/D conversions initiated
VHYST
Power-On Reset
Hysteresis Voltage
Temperature-to-Digital Converter Characteristics
tCONV
Accuracy—Local Temperature
Note 5, 6
Accuracy—Remote Temperature
Note 5, 6, 7
Conversion Time, Note 5
0°C ≤ TA ≤ +100°C, INT open,
3V ≤ VDD ≤ 3.6V
–55°C ≤ TA ≤ +125°C, INT open,
3V ≤ VDD ≤ 3.6V
0°C ≤ TD ≤ +100°C, INT open,
3V ≤ VDD ≤ 3.6V, 0°C ≤ TA ≤ +85°C
–55°C ≤ TD ≤ +125°C, INT open,
3V ≤ VDD ≤ 3.6V, 0°C ≤ TA ≤ +85°C
local temperature
remote temperature
Remote Temperature Input (T1)
IF Current to External Diode high level
Note 5
low level
Address Inputs (A2/T1, A1, A0)
VIL
VIH
CIN
ILEAK
IPD
Low Input Voltage
High Input Voltage
Input Capacitance
Input Current
Pulldown Current on A2/T1
2.7V ≤ VDD ≤ 5.5V
2.7V ≤ VDD ≤ 5.5V
A2 = VDD, flows for tPOR at power-up
Min Typ Max Units
340 500
2.5
1 10
15 100
2.0 2.7
µA
µA
µA
µs
V
250 mV
±1 ±2 °C
±2 ±3 °C
±1 ±3 °C
±2 ±5 °C
100 160 ms
200 320 ms
224 400
µA
7.5 14
µA
0.6
2.0
10
±0.01 ±1
25
V
V
pF
µA
µA
May 2006
3
MIC184







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