MIC384 Datasheet, PDF (1/21 Pages) Micrel Semiconductor – Three-Zone Thermal Supervisor Advance Information

MIC384
Micrel
MIC384
Three-Zone Thermal Supervisor
Advance Information
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 di-
odes 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
software 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
addresses available – contact Micrel.) Superior perfor-
mance, 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
MIC384-0BM
100 100x
–55°C to +125°C
8-Lead SOP
MIC384-1BM
100 101x
–55°C to +125°C
8-Lead SOP
MIC384-2BM
100 110x
–55°C to +125°C
8-Lead SOP
MIC384-3BM
100 111x
–55°C to +125°C
8-Lead SOP
MIC384-0BMM
100 100x
–55°C to +125°C
8-Lead MSOP
MIC384-1BMM
100 101x
–55°C to +125°C
8-Lead MSOP
MIC384-2BMM
100 110x
–55°C to +125°C
8-Lead MSOP
MIC384-3BMM
100 111x
–55°C to +125°C
8-Lead MSOP
* The least-significant bit of the slave address is determined by the state of the A0 pin.
Notes
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. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
September 2000
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MIC384