Texas Instruments TMP411, TMP411BDGKTG4 Datasheet
TMP411
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
SBOS383A − FEBRUAR Y 2007
±1°C Remote and Local TEMPERATURE SENSOR
with N-Factor and Series Resistance Correction
FEATURES
D ±1°C REMOTE DIODE SENSOR
D ±1°C LOCAL TEMPERATURE SENSOR
D PROGRAMMABLE NON-IDEALITY FACTOR
D SERIES RESISTANCE CANCELLATION
D ALERT FUNCTION
D PROGRAMMABLE RESOLUTION: 9 to 12 Bits
D PROGRAMMABLE THRESHOLD LIMITS
D TWO-WIRE/SMBus SERIAL INTERFACE
D MINIMUM AND MAXIMUM TEMPERATURE
MONITORS
D MULTIPLE INTERFACE ADDRESSES
D ALERT/THERM2 PIN CONFIGURATION
D DIODE FAULT DETECTION
APPLICATIONS
D LCD/DLP/LCOS PROJECTORS
D SERVERS
D INDUSTRIAL CONTROLLERS
D CENTRAL OFFICE TELECOM EQUIPMENT
D DESKTOP AND NOTEBOOK COMPUTERS
D STORAGE AREA NETWORKS (SAN)
D INDUSTRIAL AND MEDICAL
EQUIPMENT
D PROCESSOR/FPGA
TEMPERATURE MONITORING
V+
GND
SCL
SDA
V+
1
5
Conversion Rate
D+
2
3
−
D
8
7
TMP411
N−Factor
Correction
Local
Temperature
Register
Register
Remote
Temperature
Register
DESCRIPTION
The TMP411 is a remote temperature sensor monitor with
a built-in local temperature sensor. The remote
temperature sensor diode-connected transistors are
typically low-cost, NPN- or PNP-type transistors or diodes
that are an integral part of microcontrollers,
microprocessors, or FPGAs.
Remote accuracy is ±1°C for multiple IC manufacturers,
with no calibration needed. The Two-Wire serial interface
accepts SMBus write byte, read byte, send byte, and
receive byte commands to program the alarm thresholds
and to read temperature data.
Features that are included in the TMP411 are: series
resistance cancellation, programmable non-ideality factor,
programmable resolution, programmable threshold limits,
minimum and maximum temperature monitors, wide
remote temperature measurement range (up to +150°C),
diode fault detection, and temperature alert function.
The TMP411 is available in both MSOP-8 and SO-8
(available Q1 2007) packages.
4
THERM
6
ALERT/THERM2
Interrupt
Configuration
Status Regis ter
T
L
Temperature
Comparators
T
R
Bus Interface Pointer Register
Local Temperature Min/Max Register
Remote Temperature Min/Max Register
Consecutive Alert
Configuration Register
Remote Temp High Limit
Remote THERM Limit
Remote TempLow Limit
THERM Hysteresis Register
Local Temp High Limit
Local THE RM Limit
Local Temp Low Limit
Manufacturer IDRegister
Device ID Register
Configuration Register
Resolution Register
semiconductor products and disclaimers thereto appears at the end of this data sheet.
DLP is a registered trademark of Texas Instruments. SMBus is a trademark of Intel Corp.
All other trademarks are the property of their respective owners.
! !
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Copyright 2006−2007, Texas Instruments Incorporated
"#$$
TMP411A
Remote Junction Temperature Sensor
100 1100
TMP411B
Remote Junction Temperature Sensor
100 1101
SBOS383A − FEBRUARY 2007
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ABSOLUTE MAXIMUM RATINGS
(1)
Power Supply, VS 7.0V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, pins 2, 3, 4 only −0.5V to VS + 0.5V. . . . . . . . . . . . .
Input Voltage, pins 6, 7, 8 only −0.5V to 7V. . . . . . . . . . . . . . . . . . .
Input Current 10mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range −55°C to +127°C. . . . . . . . . . . . . . .
Storage Temperature Range −60°C to +130°C. . . . . . . . . . . . . . . . .
Junction Temperature (TJ max) +150°C. . . . . . . . . . . . . . . . . . . . . .
proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible t o damage because very small parametric changes could
cause the device not to meet its published specifications.
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to observe
ESD Rating:
Human Body Model (HBM) 3000V. . . . . . . . . . . . . . . . . . . . . . .
Charged Device Model (CDM) 1000V. . . . . . . . . . . . . . . . . . . .
Machine Model (MM) 200V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(1)
Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only , an d
functional operation of the device at these or any other conditions
beyond those specified is not supported.
ORDERING INFORMATION
PRODUCT DESCRIPTION I2C ADDRESS PACKAGE-LEAD
(1)
PACKAGE
DESIGNATOR
PACKAGE
MARKING
MSOP-8 DGK 411A
(2)
SO-8
D T411A
MSOP-8 DGK 411B
(2)
SO-8
(1)
For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site
at www .ti.com.
(2)
Available Q1 2007.
D T411B
PIN CONFIGURATION
Top View MSOP, SO
TMP411
V+
D+
D
THERM
1
2
−
3
4
SCL
8
SDA
7
ALERT/THERM2
6
GND
5
PIN ASSIGNMENTS
PIN NAME DESCRIPTION
1 V+ Positive supply (2.7V to 5.5V)
2 D+
3 D−
4 THERM
5 GND Ground
6 ALERT/THERM2
7 SDA
8 SCL
Positive connection to remote temperature
sensor
Negative connection to remote temperature
sensor
Thermal flag, active low, open-drain;
requires pull-up resistor to V+
Alert (reconfigurable as second thermal
flag), active low, open-drain; requires
pull-up resistor to V+
Serial data line for SMBus, open-drain;
requires pull-up resistor to V+
Serial clock line for SMBus, open-drain;
requires pull-up resistor to V+
2
"#$$
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SBOS383A − FEBRUARY 2007
ELECTRICAL CHARACTERISTICS
At TA = −40°C to +125°C and VS = 2.7V to 5.5V , unless otherwise noted.
TMP411
PARAMETERS CONDITIONS
TEMPERATURE ERROR
Local Temperature Sensor TE
Remote Temperature Sensor
vs Supply
Local/Remote VS = 2.7V to 5.5V ±0.2 ±0.5 °C/V
TEMPERATURE MEASUREMENT
Conversion Time (per channel) 105 115 125 ms
Resolution
Local Temperature Sensor (programmable) 9 12 Bits
Remote Temperature Sensor 12 Bits
Remote Sensor Source Currents
High Series Resistance 3kΩ Max 120 µA
Medium High 60 µA
Medium Low 12 µA
Low 6 µA
Remote Transistor Ideality Factor η TMP411 Optimized Ideality Factor 1.008
SMBus INTERFACE
Logic Input High Voltage (SCL, SDA) V
Logic Input Low Voltage (SCL, SDA) V
Hysteresis 500 mV
SMBus Output Low Sink Current 6 mA
Logic Input Current −1 +1 µA
SMBus Input Capacitance (SCL, SDA) 3 pF
SMBus Clock Frequency 3.4 MHz
SMBus Timeout 25 30 35 ms
SCL Falling Edge to SDA Valid T ime 1 µs
DIGITAL OUTPUTS
Output Low Voltage V
High-Level Output Leakage Current I
ALERT/THERM2 Output Low Sink Current ALERT/THERM2 Forced to 0.4V 6 mA
THERM Output Low Sink Current THERM Forced to 0.4V 6 mA
POWER SUPPLY
Specified Voltage Range V
Quiescent Current I
Undervoltage Lock Out 2.3 2.4 2.6 V
Power-On Reset Threshold POR 1.6 2.3 V
TEMPERATURE RANGE
Specified Range −40 +125 °C
Storage Range −60 +130 °C
Thermal Resistance
MSOP-8, SO-8 150 °C/W
(1)
Tested with less than 5Ω effective series resistance and 100pF differential input capacitance.
(1)
LOCAL
TE
REMOTETA
OL
OH
= +15°C to +75°C, TD = −40°C to +150°C, VS = 3.3V ±0.0625 ±1 °C
TA = −40°C to +100°C, TD = −40°C to +150°C, VS = 3.3V ±1 ±3 °C
TA = −40°C to +125°C, TD = −40°C to +150°C ±3 ±5 °C
IH
IL
S
Q
Serial Bus Active, fS = 400kHz, Shutdown Mode 90 µA
Serial Bus Active, fS = 3.4MHz, Shutdown Mode 350 µA
TA = −40°C to +125°C ±1.25 ±2.5 °C
TA = +15°C to +85°C, VS = 3.3V ±0.0625 ±1 °C
I
= 6mA 0.15 0.4 V
OUT
V
= V
OUT
S
0.0625 Conversions per Second 28 30 µA
Eight Conversions per Second 400 475 µA
Serial Bus Inactive, Shutdown Mode 3 10 µA
MIN TYP MAX
2.1 V
0.8 V
0.1 1 µA
2.7 5.5 V
UNITS
3
"#$$
SBOS383A − FEBRUARY 2007
TYPICAL CHARACTERISTICS
At TA = +25°C and VS = 5.0V , unless otherwise noted.
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REMOTE TEMPERATURE ERROR
3
VS=3.3V
T
REMOTE
C)
2
_
30 Typical Units Shown
η
=1.008
1
0
−
1
−
2
Remote Temperature Error (
−
3
−
50−25 1251007550250
=+25_C
vs TEMPERATURE
Ambient Temperature, T
A
(_C)
Figure 1.
REMOTE TEMPERATURE ERROR
60
C)
40
_
20
0
−
20
−
40
Remote Temperature Error (
−
60
0 5 10 15 20 25 30
vs LEAKAGE RESISTANCE
R−GND
R−V
S
Leakage Resistance (MΩ)
Figure 3.
LOCAL TEMPERATURE ERROR
3.0
VS=3.3V
2.0
C)
_
1.0
0
−1.0
−2.0
Local Temperature Error (
−3.0
−50 125−25 0 25 50 75 100
vs TEMPERATURE
50 Units Shown
Ambient Temperature, TA(_C)
Figure 2.
REMOTE TEMPERATURE ERROR vsSERIES RESISTANCE
2.0
1.5
C)
_
1.0
0.5
0
− 0.5
− 1.0
− 1.5
Remote Temperature Error (
− 2.0
(Diode−Connected Transistor, 2N3906 PNP)
VS=2.7V
03500500 1000 1500 2000 2500 3000
RS(Ω)
Figure 4.
VS=5.5V
REMOTE TEMPERATURE ERROR vsSERIES RESISTANCE
(GND Collector−Connected Transistor, 2N3906 PNP)
2.0
1.5
C)
_
1.0
0.5
0
− 0.5
− 1.0
− 1.5
Remote Temperature Error (
− 2.0
03500500 1000 1500 2000 2500 3000
VS=2.7V
RS(Ω)
Figure 5.
VS=5.5V
3
C)
2
_
1
0
−
1
−
2
Remote Temperature Error (
−
3
0 0.5 1.0 1.5 2.0 2.5 3.0
REMOTE TEMPERATURE ERROR
vs DIFFERENTIAL CAPACITANCE
Capacitance (nF)
Figure 6.
4
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TYPICAL CHARACTERISTICS (continued)
At TA = +25°C and VS = 5.0V , unless otherwise noted.
"#$$
SBOS383A − FEBRUAR Y 2007
TEMPERATUREERROR
25
20
15
C)
_
10
5
0
−
5
−
10
Temperature Error (
−
15
−
20
−
25
vs POWER−SUPPLY NOISE FREQUENCY
Local 100mVPPNoise
Remote 100mV
Local 250mV
Remote 250mV
051015
Frequency (MHz)
PP
Noise
PP
Noise
Noise
PP
Figure 7.
SHUTDOWN QUIESCENT CURRENT
500
450
400
350
300
A)
µ
250
(
Q
I
200
150
100
50
0
1k 10k 100k 1M 10M
vs SCL CLOCK FREQUENCY
VS=5.5V
VS=3.3V
SCLCLockFrequency(Hz)
QUIESCENT CURRENT
500
450
400
350
300
A)
µ
250
(
Q
I
200
150
100
50
0
0.0625 0.125 0.25 0.5 1 2 4 8
vs CONVERSION RATE
VS=5.5V
VS=2.7V
Conversion Rate (conversions/sec)
Figure 8.
SHUTDOWN QUIESCENT CURRENT
8
7
6
5
A)
µ
4
(
Q
I
3
2
1
0
vs SUPPLY VOLTAGE
4.53.0 3.5 4.0 5.55.02.5
VS(V)
Figure 9.
Figure 10.
5
"#$$
SBOS383A − FEBRUAR Y 2007
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APPLICATIONS INFORMATION
The TMP411 is a dual-channel digital temperature sensor
that combines a local die temperature measurement
channel and a remote junction temperature measurement
channel in a single MSOP-8 or SO-8 package. The
TMP411 is Two-Wire- and SMBus interface-compatible
and is specified over a temperature range of −40°C to
+125°C. The TMP411 contains multiple registers for
holding configuration information, temperature
measurement results, temperature comparator
maximum/minimum limits, and status information.
User-programmed high and low temperature limits stored
in the TMP401 can be used to monitor local and remote
temperatures to trigger an over/under temperature alarm
+5V
(1)
Transistor−connected configuration
Series Resistance
(2)
R
S
(2)
R
S
:
2
D+
(3)
C
DIFF
3
−
D
1
V+
TMP411
SDA
ALERT/THERM2
0.1µF
SCL
(ALERT
). Additional thermal limits can be programmed
into the TMP411 and used to trigger another flag (THERM
that can be used to initiate a system response to rising
temperatures.
The TMP411 requires only a transistor connected between
D+ and D− for proper remote temperature sensing
operation. The SCL and SDA interface pins require pull-up
resistors as part of the communication bus, while ALERT
and THERM are open-drain outputs that also need pull−up
resistors. ALERT
and THERM may be shared with other
devices if desired for a wired-OR implementation. A 0.1µF
power-supply bypass capacitor is recommended for good
local bypassing. Figure 11 shows a typical configuration
for the TMP411.
10k
(typ)
Ω
Ω
10k
(typ)
8
7
6
10k
(typ)
Ω
10k
(typ)
Ω
SMBus
Controller
)
Diode−connectedconfiguration
(2)
R
S
(2)
R
S
THERM
GND
(1)
:
(3)
C
DIFF
5
(1) Diode−connected configuration provides better settling time.
NOTES:
(2) R
(3) C
4
Transistor−connected configuration provides better series resistance cancellation.
should be < 1.5kΩin most applications.
S
should be < 1000pF in most applications.
DIFF
Fan Controller
Figure 11. Basic Connections
6
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TEMP
TEMP
"#$$
SBOS383A − FEBRUAR Y 2007
SERIES RESISTANCE CANCELLATION
Series resistance in an application circuit that typically
results from printed circuit board (PCB) trace resistance
and remote line length (see Figure 11) is automatically
cancelled by the TMP411, preventing what would
otherwise result in a temperature offset.
A total of up to 3kΩ of series line resistance is cancelled
by the TMP411, eliminating the need for additional
characterization and temperature offset correction.
See the two Remote Temperature Error vs Series
Resistance typical characteristics curves for details on the
effect of series resistance and power-supply voltage on
sensed remote temperature error.
DIFFERENTIAL INPUT CAPACITANCE
The TMP411 tolerates differential input capacitance of up
to 1000pF with minimal change in temperature error. The
effect of capacitance on sensed remote temperature error
is illustrated in typical characteristic Remote Temperature
Error vs Differential Capacitance.
TEMPERATURE MEASUREMENT DATA
Temperature measurement data is taken over a default
range of 0 °C to +127°C for both local and remote locations.
Measurements from −55°C to +150°C can be made both
locally and remotely by reconfiguring the TMP411 for the
extended temperature range. To change the TMP411
configuration from the standard to the extended
temperature range, switch bit 2 (RANGE) of the
Configuration Register from low to high.
for ambient temperatures ranging from −40°C to +125°C.
Parameters in the Absolute Maximum Ratings table must
be observed.
Table 1. Temperature Data Format
(Local and Remote Temperature High Bytes)
LOCAL/REMOTE TEMPERATURE REGISTER
HIGH BYTE VALUE (+1°C RESOLUTION)
STANDARD BINARY EXTENDED BINARY
(°C)
−64 0000 0000 00 0000 0000 00
−50 0000 0000 00 0000 1110 0E
−25 0000 0000 00 0010 0111 27
0 0000 0000 00 0100 0000 40
1 0000 0001 01 0100 0001 41
5 0000 0101 05 0100 0101 45
10 0000 1010 0A 0100 1010 4A
25 0001 1001 19 0101 1001 59
50 0011 0010 32 0111 0010 72
75 0100 1011 4B 1000 1011 8B
100 0110 0100 64 1010 0100 A4
125 0111 1101 7D 1011 1101 BD
127 0111 1111 7F 1011 1111 BF
150 0111 1111 7F 1101 0110 D6
175 0111 1111 7F 1110 1111 EF
191 0111 1111 7F 1111 1111 FF
BINARY HEX BINARY HEX
Temperature data resulting from conversions within the
default measurement range is represented in binary form,
as shown in Table 1, Standard Binary column. Note that
any temperature below 0°C results in a data value of zero
(00h). Likewise, temperatures above +127°C result in a
value of 127 (7Fh). The device can be set to measure over
an extended temperature range by changing bit 2 of the
Configuration Register from low to high. The change in
measurement range and data format from standard binary
to extended binary occurs at the next temperature
conversion. For data captured in the extended
temperature range configuration, an offset of 64 (40h) is
added to the standard binary value, as shown in Table 1,
Extended Binary column. This configuration allows
measurement of temperatures below 0°C. Note that binary
values corresponding to temperatures as low as −64°C,
and as high as +191°C are possible; however, most
temperature sensing diodes only measure with the range
of −55°C to +150°C. Additionally, the TMP411 is rated only
NOTE: Whenever changing between standard and
extended temperature ranges, be aware that the
temperatures stored in the temperature limit registers are
NOT automatically reformatted to correspond to the new
temperature range format. These temperature limit values
must be reprogrammed in the appropriate binary or
extended binary format.
Both local and remote temperature data use two bytes for
data storage. The high byte stores the temperature with
1°C resolution. The second or low byte stores the decimal
fraction value of the temperature and allows a higher
measurement resolution; see Table 2. The measurement
resolution for the remote channel is 0.0625°C, and is not
adjustable. The measurement resolution for the local
channel is adjustable; it can be set for 0.5°C, 0.25°C,
0.125°C, or 0.0625°C by setting the RES1 and RES0 bits
of the Resolution Register; see the Resolution Register
section.
7
"#$$
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SBOS383A − FEBRUAR Y 2007
Table 2. Decimal Fraction Temperature Data Format (Local and Remote Temperature Low Bytes)
REMOTE TEMPERA TURE
REGISTER LOW BYTE
VALUE
0.0625°C RESOLUTION 0.5°C RESOLUTION 0.25°C RESOLUTION 0.125°C RESOLUTION 0.0625°C RESOLUTION
TEMP
(°C)
0.0000 0000 0000 00 0000 0000 00 0000 0000 00 0000 0000 00 0000 0000 00
0.0625 0001 0000 10 0000 0000 00 0000 0000 00 0000 0000 00 0001 0000 10
0.1250 0010 0000 20 0000 0000 00 0000 0000 00 0010 0000 20 0010 0000 20
0.1875 0011 0000 30 0000 0000 00 0000 0000 00 0010 0000 20 0011 0000 30
0.2500 0100 0000 40 0000 0000 00 0100 0000 40 0100 0000 40 0100 0000 40
0.3125 0101 0000 50 0000 0000 00 0100 0000 40 0100 0000 40 0101 0000 50
0.3750 0110 0000 60 0000 0000 00 0100 0000 40 0110 0000 60 0110 0000 60
0.4375 0111 0000 70 0000 0000 00 0100 0000 40 0110 0000 60 0111 0000 70
0.5000 1000 0000 80 1000 0000 80 1000 0000 80 1000 0000 80 1000 0000 80
0.5625 1001 0000 90 1000 0000 80 1000 0000 80 1000 0000 80 1001 0000 90
0.6250 1010 0000 A0 1000 0000 80 1000 0000 80 1010 0000 A0 1010 0000 A0
0.6875 1011 0000 B0 1000 0000 80 1000 0000 80 1010 0000 A0 1011 0000 B0
0.7500 1100 0000 C0 1000 0000 80 1100 0000 C0 1100 0000 C0 1100 0000 C0
0.8125 1101 0000 D0 1000 0000 80 1100 0000 C0 1100 0000 C0 1101 0000 D0
0.8750 1110 0000 E0 1000 0000 80 1100 0000 C0 1110 0000 E0 1110 0000 E0
0.9385 1111 0000 F0 1000 0000 80 1100 0000 C0 1110 0000 E0 1111 0000 F0
BINARY
HEX
STANDARD
AND EXTENDED
STANDARD
AND EXTENDED
BINARY
LOCAL TEMPERATURE REGISTER LOW BYTE VALUE
HEX
STANDARD
AND EXTENDED
BINARY
HEX
STANDARD
AND EXTENDED
BINARY
HEX
STANDARD
AND EXTENDED
BINARY
HEX
REGISTER INFORMATION
The TMP411 contains multiple registers for holding
configuration information, temperature measurement
results, temperature comparator maximum/minimum,
limits, and status information. These registers are
described in Figure 12 and Table 3.
POINTER REGISTER
Figure 12 shows the internal register structure of the
TMP411. The 8-bit Pointer Register is used to address a
given data register. The Pointer Register identifies which
of the data registers should respond to a read or write
command on the Two-Wire bus. This register is set with
every write command. A write command must be issued
to set the proper value in the Pointer Register before
executing a read command. Table 3 describes the pointer
address of the registers available in the TMP411. The
power-on reset (POR) value of the Pointer Register is 00h
(0000 0000b).
Pointer Register
Local and Remote Temperature Registers
Local and Remote Limit Registers
THERM Hysteresis Register
Status Register
Configuration Register
Resolution Register
Conversion Rate Register
Consecutive Alert Register
Identification Registers
Local Temperature Min/Max
Remote Temperature Min/Max
Control
Interface
Figure 12. Internal Register Structure
SDA
I/O
SCL
8
"#$$
RESET
RESET
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SBOS383A − FEBRUAR Y 2007
Table 3. Register Map
POINTER
ADDRESS (HEX)
READ WRITE
00 NA
01 NA 00 RT11 RT10 RT9 RT8 RT7 RT6 RT5 RT4
02 NA XX BUSY LHIGH LLOW RHIGH RLOW OPEN RTHRM LTHRM Status Register
03 09 00 MASK1 SD AL/TH 0 0 RANGE 0 0 Configuration Register
04 0A 08 0 0 0 0 R3 R2 R1 R0 Conversion Rate Register
05 0B 55 LTH11 LTH10 LTH9 LTH8 LTH7 LTH6 LTH5 LTH4
06 0C 00 LTL11 LTL10 LTL9 LTL8 LTL7 LTL6 LTL5 LTL4
07 0D 55 RTH11 RTH10 RTH9 RTH8 RTH7 RTH6 RTH5 RTH4
08 0E 00 RTL11 RTL10 RTL9 RTL8 RTL7 RTL6 RTL5 RTL4
10 NA 00 RT3 RT2 RT1 RT0 0 0 0 0
13 13 00 RTH3 RTH2 RTH1 RTH0 0 0 0 0
14 14 00 RTL3 RTL2 RTL1 RTL0 0 0 0 0
15 NA 00 LT3 LT2 LT1 LT0 0 0 0 0 Local Temperature (Low Byte)
16 16 00 LTH3 LTH2 LTH1 LTH0 0 0 0 0
17 17 00 LTL3 LTL2 LTL1 LTL0 0 0 0 0
18 18 00 NC7 NC6 NC5 NC4 NC3 NC2 NC1 NC0 N-factor Correction
19 19 55 RTHL11 RTHL10 RTHL9 RTHL8 RTHL7 RTHL6 RTHL5 RTHL4 Remote THERM Limit
1A 1A 1C 0 0 0 1 1 1 RES1 RES0 Resolution Register
20 20 55 LTHL11 LTHL10 LTHL9 LTHL8 LTHL7 LTHL6 LTHL5 LTHL4 Local THERM Limit
21 21 0A TH11 TH10 TH9 TH8 TH7 TH6 TH5 TH4 THERM Hysteresis
22 22 80 TO_EN 0 0 0 C2 C1 C0 0 Consecutive Alert Register
30 30 FF LMT11 LMT10 LMT9 LMT8 LMT7 LMT6 LMT5 LMT4
31 31 F0 LMT3 LMT2 LMT1 LMT0 0 0 0 0
32 32 00 LXT11 LXT10 LXT9 LXT8 LXT7 LXT6 LXT5 LXT4
33 33 00 LXT3 LXT2 LXT1 LXT0 0 0 0 0
34 34 FF RMT11 RMT10 RMT9 RMT8 RMT7 RMT6 RMT5 RMT4
35 35 F0 RMT3 RMT2 RMT1 RMT0 0 0 0 0
36 36 00 RXT11 RXT10 RXT9 RXT8 RXT7 RXT6 RXT5 RXT4
37 37 00 RXT3 RXT2 RXT1 RXT0 0 0 0 0
NA FC XX X
FE NA 55 0 1 0 1 0 1 0 1 Manufacturer ID
FF NA 11 0 0 0 1 0 0 0 1 Device ID
(1)
NA = not applicable; register is write- or read-only.
(2)
X = indeterminate state.
(1)
POWER-ON
(HEX)
00 LT11 LT10 LT9 LT8 LT7 LT6 LT5 LT4 Local Temperature (High Byte)
D7 D6 D5 D4 D3 D2 D1 D0
(2)
X X X X X X X Software Reset
BIT DESCRIPTIONS
REGISTER DESCRIPTIONS
Remote Temperature
(High Byte)
Local T emperature High Limit
(High Byte)
Local Temperature Low Limit
(High Byte)
Remote Temperature
High Limit (High Byte)
Remote Temperature
Low Limit (High Byte)
Remote Temperature
(Low Byte)
Remote Temperature
High Limit (Low Byte)
Remote Temperature
Low Limit (Low Byte)
Local T emperature High Limit
(Low Byte)
Local Temperature Low Limit
(Low Byte)
Local Temperature Minimum
(High Byte)
Local Temperature Minimum
(Low Byte)
Local Temperature Maximum
(High Byte)
Local Temperature Maximum
(Low Byte)
Remote Temperature Minimum
(High Byte)
Remote Temperature Minimum
(Low Byte)
Remote Temperature
Maximum (High Byte)
Remote Temperature
Maximum (Low Byte)
9
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