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  ON Semiconductor Electronic Components Datasheet  

MAX1617 Datasheet

SMBus Temperature Sensor with Internal and External Diode Input

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MAX1617
SMBus Temperature Sensor
with Internal and External
Diode Input
The MAX1617 is a serially programmable temperature sensor
optimized for monitoring modern high performance CPUs with
on–board, integrated temperature sensing diodes. Temperature data is
converted from the CPU’s diode outputs and made available as an
8–bit digital word.
Communication with the MAX1617 is accomplished via the
standard System Management Bus (SMBus) commonly used in
modern computer systems. This permits reading the current
internal/external temperature, programming the threshold setpoints,
and configuring the device. Additionally, an interrupt is generated on
the ALERT pin when temperature moves outside the preset threshold
windows in either direction.
A Standby command may be sent via the SMBus by signaling the
STBY input to activate the low–power Standby mode. Registers can
be accessed while in Standby mode. Address selection inputs allow up
to nine MAX1617s to share the same 2–wire SMBus for multi–zone
monitoring.
All registers can be read by the host, and both polled and interrupt
driven systems are easily accommodated. Small size, low installed
cost, and ease of use make the MAX1617 an ideal choice for
implementing sophisticated system management schemes, such as
ACPI.
Features
Includes Internal and External Sensing Capability
Outputs Temperature As 8–Bit Digital Word
Solid State Temperature Sensing; 1°C Resolution
3.0 — 5.5V Operating Range
Independent Internal and External Threshold Set–Points With
ALERT Interrupt Output
SMBus 2–Wire Serial Interface
Up To 9 MAX1617s May Share the Same Bus
Low Standby Power Mode
Low Power: 70 µA (max) Operating, 10 µA (max) Standby Mode
16–Pin Plastic QSOP Package
Operating Temperature Range: –55°C to +125°C
Typical Applications
Thermal Protection For Intel “Deschutes” Pentium IIand Other
High Performance CPUs with Integrated On–Board Diode - No
Sensor Mounting Problems!
Accurate Temperature Sensing From Any Silicon Junction Diode
Thermal Management in Electronic Systems: Computers, Network
Equipment, Power Supplies
http://onsemi.com
16–Pin QSOP
DB SUFFIX
CASE TBD
PRELIMINARY INFORMATION
PIN CONFIGURATION
(Top View)
NC 1
16 NC
VDD
D+
D–
NC
2 15 STBY
3 14 SCL
4 13 NC
5 MAX1617 12 SDA
ADD1 6
11 ALERT
GND 7
10 ADD0
GND 8
9 NC
ORDERING INFORMATION
Device
Package
Shipping
MAX1617DBR2 16–Pin QSOP 2500 Tape/Reel
© Semiconductor Components Industries, LLC, 1999
February, 2000 – Rev. 0
1
Publication Order Number:
MAX1617/D


  ON Semiconductor Electronic Components Datasheet  

MAX1617 Datasheet

SMBus Temperature Sensor with Internal and External Diode Input

No Preview Available !

MAX1617
FUNCTIONAL BLOCK DIAGRAM
Internal
Sensor
(Diode)
D+ DS
D– Modulator
Register Set
Int. Temp
Ext.Temp
Status Byte
Config. Byte
Conv. Rate
Ext. Hi Limit
Ext. Lo Limit
Int. Hi Limit
Int. Lo Limit
Control
Logic
ALERT
STBY
SMBus
Interface
SCL
SDA
ADD 0
ADD 1
ABSOLUTE MAXIMUM RATINGS*
Symbol
Parameter
VDD
Power Supply Voltage
Voltage on Any Pin
TA Operating Temperature Range
Tstg Storage Temperature Range
SMBus Input/Output Current
D– Input Current
PD Maximum Power Dissipation
* Maximum Ratings are those values beyond which damage to the device may occur.
Value
6.0
(GND – 0.3 V) to (VDD + 0.3 V)
–55 to +125
–65 to +150
–1 to +50
±1
330
Unit
V
V
°C
°C
mA
mA
mW
http://onsemi.com
2


Part Number MAX1617
Description SMBus Temperature Sensor with Internal and External Diode Input
Maker ON Semiconductor
Total Page 12 Pages
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