MIC184 Datasheet, PDF (1/21 Pages) Micrel Semiconductor – Local/Remote Thermal Supervisor Advance Information

MIC184
Micrel
MIC184
Local/Remote Thermal Supervisor
Advance Information
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 measure-
ment 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 overtem-
perature alarm or thermostatic control signal. Three program-
mable address 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
demanding 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
Temperature Range
–55°C to +125°C
–55°C to +125°C
Package
8-lead SOP
8-lead MSOP
Typical Application
3.0V to 3.6V
V_DD
3×
10k
Data
Clock
Interrupt
MIC184
8 _VDD
A2/T1 ⁵
1 _DATA
A1 ⁶
2 _CLK
A0 ⁷
3 _INT
GND ⁴
0.1µF
ceramic
2200pF
FROM
SERIAL BUS
HOST
2-Channel SMBus Temperature Measurement System
OPTIONAL
REMOTE
TEMPERATURE
SENSOR
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
November 2000
1
MIC184