MIC184_06 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – Local/Remote Thermal Supervisor

MIC184
Micrel
MIC184
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
V_DD
3×
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 [phone] • fax + 1 [phone] • http://www.micrel.com
May 2006
1
MIC184