MIC384_05 Datasheet, PDF (1/22 Pages) Micrel Semiconductor – Three-Zone Thermal Supervisor

MIC384
Micrel
MIC384
Three-Zone Thermal Supervisor
General Description
Features
The MIC384 is a versatile digital thermal supervisor capable
of measuring temperature using its own internal sensor and
two inexpensive external sensors or embedded silicon diodes
such as those found in the Intel Pentium III* CPU. A 2-wire
serial interface is provided to allow communication with either
I²C** or SMBus* masters. The open-drain interrupt output
pin can be used as either an over-temperature alarm or a
thermostatic control signal.
Interrupt mask and status bits are provided for reduced soft-
ware overhead. Fault queues prevent nuisance tripping due
to thermal or electrical noise. A programmable address pin
permits two devices to share the bus. (Alternate base ad-
dresses available – contact Micrel.) Superior performance,
low power and small size makes the MIC384 an excellent
choice for multiple zone thermal management applications.
*SMBus and Pentium III are trademarks of Intel Corporation.
**I²C is a trademark of Philips Electronics, N.V.
Ordering Information
• Measures Local and Two Remote Temperatures
• 2-Wire SMBus-compatible Interface
• Programmable Thermostat Settings for All Three Zones
• Open-Drain Interrupt Output Pin
• Interrupt Mask and Status Bits
• Fault Queues to Prevent Nuisance Tripping
• Low Power Shutdown Mode
• Failsafe response to diode faults
• 2.7V to 5.5V Power Supply Range
• 8-Lead SOIC and MSOP Packages
Applications
• Desktop, Server and Notebook Computers
• Power Supplies
• Test and Measurement Equipment
• Wireless Systems
• Networking/Datacom Hardware
Part Number
Base Address (*) Junction Temp. Range Package
Availability
Standard
Pb-Free
MIC384-0BM
MIC384-0YM
100 100x
-55°C to +125°C
MIC384-1BM
MIC384-1YM
100 101x
-55°C to +125°C
MIC384-2BM
MIC384-2YM
100 110x
-55°C to +125°C
MIC384-3BM
MIC384-3YM
100 111x
-55°C to +125°C
MIC384-0BMM MIC384-0YMM
100 100x
-55°C to +125°C
MIC384-1BMM MIC384-1YMM
100 101x
-55°C to +125°C
MIC384-2BMM MIC384-2YMM
100 110x
-55°C to +125°C
MIC384-3BMM MIC384-3YMM
100 111x
-55°C to +125°C
* The least-significant bit of the slave address is determined by the state of the A0 pin.
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead MSOP
8-Lead MSOP
8-Lead MSOP
8-Lead MSOP
Contact Factory
Contact Factory
Contact Factory
Contact Factory
Contact Factory
Contact Factory
Typical Application
3.3V
3 × 10k
pull-ups
FROM
SERIAL BUS
HOST
MIC384
DATA
VDD
CLK
T1
/INT
T2
GND
A0
0.1µF
2200pF
REMOTE
DIODE
2200pF
REMOTE
DIODE
3-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
September 2005
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MIC384