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TCM1617MQR Datasheet

  • TCM1617MQR

  • SMBus Thermal Sensor with External Diode Input

  • 14頁

  • MICROCHIP   MICROCHIP

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EVALUATION
KIT
AVAILABLE
TCM1617
SMBus Thermal Sensor with External Diode Input
FEATURES
s
s
s
s
s
s
s
s
s
s
Includes Internal External Sensing Capability
Outputs Temperature as 8-Bit Digital Word
Solid State Temperature Sensing; 1
擄
C Resolution
3.0 鈥?5.5V Operating Range
Independent Internal and External Threshold
Set-Points With ALERT# Interrupt Output
SMBus 2-Wire Serial Interface
Up To Nine TCM1617s May Share the Same Bus
Standby Mode for Low Standby Power
Low Power ............................ 70
碌
A (max) Operating
...................................... 10
碌
A (max) Standby Mode
16-Pin Plastic QSOP Package
GENERAL DESCRIPTION
The TCM1617 is a serially programmable temperature
sensor optimized for monitoring modern high performance
CPUs with on-board integrated thermal diodes. Tempera-
ture data is converted from the CPU鈥檚 thermal diode outputs
and made available as an 8-Bit digital word.
Communication with the TCM1617 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. Addition-
ally, 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 TCM1617s 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 TCM1617
an ideal choice for implementing sophisticated system man-
agement schemes, such as ACPI.
TYPICAL APPLICATIONS
s
Thermal Protection For Intel 鈥淒eschutes鈥?/div>
Pentium II鈩?and Other High Performance CPUs
with Integrated On-Board Diode 鈥?No Sensor
Mounting Problems!
Accurate Thermal Sensing From Any Si Junction
Diode
Thermal Management in Electronic Systems:
Computers, Network Equipment, Power Supplies
s
s
BLOCK DIAGRAM
Internal
Sensor
(Diode)
D
+
D
鈥?/div>
ORDERING INFORMATION
Part No.
TCM1617MQR
TCM1617EV
Control
Logic
Package
Temp. Range
QSOP-16
鈥?5擄C to +125擄C
Evaluation Kit for TCM1617
鈭嗏垜
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
PIN CONFIGURATION
ALERT#
STBY#
NC
V
DD
D+
D鈥?/div>
1
2
3
4
5
6
7
8
TCM1617
16 NC
15 STBY#
14
13
12
11
10
9
SCL
NC
SDA
ALERT#
ADD0
NC
SCL
SDA
NC
ADD 1
GND
SMBus
Interface
ADD 0
ADD 1
GND
16-Pin Plastic QSOP
錚?/div>
2001 Microchip Technology Inc.
DS21485A
1
TCM1617-1 2/5/99

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