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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1066 Datasheet

ACPI Compliant SMBus Thermal Sensor

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TC1066 pdf
EVALUATION
KIT
AVAILABLE
ACPI-Compliant SMBus Thermal Sensor with External
Diode Input
TC1066
*Patent Pending
FEATURES
s Specifically ACPI-Compliant
s Backward Compliant to Older APM Systems
s Includes Internal and External Sensing Capability
s Outputs Temperature As 8-Bit Digital Word
s Solid State Temperature Sensing; 1°C Resolution
s 3.0 – 5.5V Operating Range
s Independent Internal and External Threshold
Set-Points With ALERT#/COMP# Interrupt Output
s SMBus 2-Wire Serial Interface
s Optional CRITICAL Set-Point for Full ACPI
Compliant Implementation
s Up To Nine TC1066s May Share the Same Bus
s Standby Mode for Low Standby Power
s Low Power ........................... 70 µA (max) Operating
....................................... 10 µA (max) Standby Mode
s 16-Pin Plastic QSOP Package
TYPICAL APPLICATIONS
s Thermal Protection For Intel “Deschutes”
Pentium™ II and Other High Performance CPUs
with Integrated On-Board Diode — No Sensor
Mounting Problems!
s Accurate Thermal Sensing From Any Si Junction
Diode
s Thermal Management in Electronic Systems:
Computers, Network Equipment, Power Supplies
BLOCK DIAGRAM
Internal
Sensor
(Diode)
D+ ∆∑
mD
Modulator
Control
Logic
oRegister Set
.cInt. Temp
uExt. Temp
t4Status Byte
Config. Byte
eConv. Rate
eExt. Hi Limit
hExt. Lo Limit
s Int. Hi Limit
ta Int. Lo Limit
a CRIT. Limit
SMBus
Interface
www.d© 2001 Microchip Technology Inc DS21351A
CRIT 0
CRIT 1
INT_SEL
OS#
ALERT#/COMP#
STBY#
SCL
SDA
ADD 0
ADD 1
GENERAL DESCRIPTION
The TC1066 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’s thermal diode outputs
and made available as an 8-bit digital word.
Communication with the TC1066 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#/COMP# pin
when temperature moves outside the preset threshold win-
dows in either direction. A separate CRITICAL setpoint is
provided through external hardwiring for “fail safe” operation
per ACPI guidelines.
A Standby command may be sent via the SMBus or by
signaling the STBY# input pin to activate the low-power
Standby mode. Registers can be accessed while in Standby
mode. Address selection inputs allow up to nine TC1066s 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 TC1066
an ideal choice for implementing sophisticated system man-
agement schemes, such as ACPI.
ORDERING INFORMATION
Part No.
Package
TC1066MQR
TCM1617EV
16-Pin QSOP
Evaluation Kit
PIN CONFIGURATION
Temp. Range
–55°C to +125°C
CRIT 1 1
VDD 2
D+ 3
D4
CRIT 0 5
ADD 1 6
GND 7
GND 8
TC1066
16 NC
15 STBY#
14 SCL
13 INT_SEL
12 SDA
11 ALERT#/COMP#
10 ADD0
9 OS#
16-Pin Plastic QSOP
TC1066-1 12/7/99


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1066 Datasheet

ACPI Compliant SMBus Thermal Sensor

No Preview Available !

TC1066 pdf
ACPI-Compliant SMBus Thermal Sensor
with External Diode Input
TC1066
ABSOLUTE MAXIMUM RATINGS*
Power Supply Voltage (VDD) .........................................6V
Voltage On Any Pin ............ (GND – 0.3V) to (VDD + 0.3V)
Operating Temperature (TA) .................. –55°C to +125°C
Storage Temperature (TSTG) .................. –65°C to +150°C
SMBus Input/Output Current ................. –1 mA to +50 mA
D– Input Current ...................................................... ±1 mA
Max. Power Dissipation (PD) ................................ 330 mW
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
DC ELECTRICAL CHARACTERISTICS: VDD = 3.3V, –55°C TA 125°C, unless otherwise noted.
Symbol Parameter
Test Conditions
Min Typ Max
Power Supply
VDD Power Supply Voltage
VUV-LOCK
VDD Undervoltage
Lockout Threshold
VPOR
Power-On Reset Threshold
IDD Operating Current
IDD Operating Current
IDD-STANDBY Standby Supply Current
IDD-STANDBY Standby Supply Current
ICRIT-BIAS CRIT[1:0] Bias Current
IADD-BIAS ADD[1:0] Bias Current
ALERT#/COMP# Output
VOL Output Low Voltage
OS# Output
VOL Output Low Voltage
ADD[1:0], CRIT [1:0] Inputs
VIL Logic Input Low
VIH Logic Input High
STBY# Input
VIL
VIH
INT_SEL
Logic Input Low
Logic Input High
VIL Logic Input Low
VIH Logic Input High
RP Internal Pull-up Resistance
Temp-to-Bits Converter
TRES
TIERR
Basic Temperature Resolution
Internal Diode Temperature
TEERR
External Diode Temperature
(Note 4)
–55 TA +125°C
VDD Falling Edge
0.25 Conv./Sec Rate
SMBus Inactive (Note 1)
2 Conv./Sec Rate
SMBus Inactive (Note 1)
VDD = 3.3V SMBus Active
VDD = 3.3V, SMBus Inactive
Power-Up Only
Power-Up Only
IOL = 1.0 mA (Note 3)
IOL = 1.0 mA (Note 3)
+60°C TA +100°C
0°C TA +125°C
–55°C TA 0°C
+60°C TA +100°C
0°C TA +125°C
–55°C TA 0°C
3.0 — 5.5
2.4 2.80 2.95
1.0 1.7 2.3
— — 70
— — 180
— — 100
— — 10
— 160 —
— 160 —
— — 0.4
— — 0.4
— — VDD x .3
VDD x .7
— — VDD x .3
VDD x .7
— — VDD x .3
VDD x .7
— 500 —
—1—
–2 — +2
–3 — +3
±3 —
–3 — +3
–5 — +5
±5 —
Unit
V
V
V
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
K
°C
°C
°C
°C
°C
°C
°C
TC1066-1 12/7/99
2 2001 Microchip Technology Inc. DS21351A


Part Number TC1066
Description ACPI Compliant SMBus Thermal Sensor
Maker Microchip Technology
Total Page 14 Pages
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