MAX1617 Datasheet, PDF (1/12 Pages) ON Semiconductor – SMBus Temperature Sensor with Internal and External Diode Input

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 II™ and 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
1
February, 2000 – Rev. 0
Publication Order Number:
MAX1617/D