CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
SENSYLINK Microelectronics
(CT75)
Digital Temperature Sensor
CT75 is a Digital Temperature Sensor with±0.5°C Accuracy
Compatible with SMBus, I2C and 2-wire Interface.
It is ideally used in HVAC, Thermal management and Portable
Devices etc.
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
1
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Table of Contents
DESCRIPTION ......................................................................................................................................................... 4
FEATURES............................................................................................................................................................... 4
APPLICATIONS ....................................................................................................................................................... 4
PIN CONFIGURATIONS (TOP VIEW) ..................................................................................................................... 4
TYPICAL APPLICATION ......................................................................................................................................... 4
PIN DESCRIPTION .................................................................................................................................................. 5
FUNCTION BLOCK ................................................................................................................................................. 5
ORDERING INFORMATION .................................................................................................................................... 6
ABSOLUTE MAXIMUM RATINGS (NOTE 2).......................................................................................................... 7
RECOMMENDED OPERATING CONDITIONS....................................................................................................... 7
ELECTRICAL CHARACTERISTICS (NOTE 3) ....................................................................................................... 8
CHARACTERISTICS (VCC=3.0V/5.0V) ................................................................................................................11
1
FUNCTION DESCRIPTIONS ..........................................................................................................................12
1.1
DIGITAL OUTPUT OF TEMPERATURE DATA ...................................................................................................12
1.2
TEMPERATURE HIGHER THAN 128 ...............................................................................................................12
1.3
REGISTER M AP ..........................................................................................................................................13
1.4
REGISTER DESCRIPTION .............................................................................................................................13
1.4.1
Temp_Data, Temperature Data ......................................................................................................13
1.4.2
Config, Configuration Setup register ............................................................................................13
1.4.3
Low_Temp_Set, Setup Low Temperature Limitation register ....................................................15
1.4.4
High_Temp_Set, Setup High Temperature Limitation register ..................................................15
1.5
SMBUS DIGITAL INTERFACE .......................................................................................................................16
1.5.1
Slave Address .................................................................................................................................16
1.5.2
Timeout ............................................................................................................................................16
1.5.3
SMBus Protocol ..............................................................................................................................17
2
1.5.4
Compatible with I C ........................................................................................................................17
1.5.5
General Call .....................................................................................................................................17
1.5.6
High-Speed (Hs) Mode ....................................................................................................................17
1.6
ALERT OUTPUT ........................................................................................................................................18
1.6.1
Comparator mode (ALTM = 0) .......................................................................................................18
1.6.2
Interrupt mode (ALTM = 1) .............................................................................................................18
1.6.3
SMBus Alert Response Address (ARA) ........................................................................................19
2
APPLICATION INFORMATION......................................................................................................................21
2.1
HOW TO IMPROVE TEMPERATURE ACCURACY..............................................................................................21
2.1.1
Noise between VCC and GND ........................................................................................................21
2.1.2
Thermal Response Time ................................................................................................................21
2.2
PCB LAYOUT .............................................................................................................................................22
2.2.1
Device placement ............................................................................................................................22
2.2.2
Cin, Pull-up resistor ........................................................................................................................22
2.3
STANDALONE THERMOSTAT ........................................................................................................................23
PACKAGE OUTLINE DIMENSIONS (SOP-8) .......................................................................................................24
PACKAGE OUTLINE DIMENSIONS (MSOP-8) ....................................................................................................25
PACKAGE OUTLINE DIMENSIONS (DFN3X3-8).................................................................................................26
REVISION HISTORY ..............................................................................................................................................27
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
2
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Figures and Tables
Figure 1. Typical Application of CT75 ......................... 4
Figure 2. CT75 function block ..................................... 5
2
Figure 3. SMBus/I CTimingDiagram ........................... 9
2
Figure 4. SMBus/I C Write Word (2-Bytes) Timing
Diagram .............................................................. 9
2
Figure 5. SMBus/I C Read Word (2-Bytes) Timing
Diagram ............................................................ 10
Figure 6. SMBus ALERT Response Diagram ........... 10
Figure 7. Temperature Accuracy vs. Temperature ... 11
Figure 8. Shutdown Current vs. Temperature........... 11
Figure 9. Shutdown Current vs. Supply Voltage ....... 11
Figure 10. Temperature Error Distribution ................ 11
Figure 11 ALERT pin output in comparator mode .... 18
Figure 12 ALERT pin output in interrupt mode ......... 19
Figure 13 ALERT pin in SMBus Alert Response (ARA)
.......................................................................... 20
Table 1. 12-bit Temperature Data (EM bit = 0) ..........12
Table 2. 13-bit Temperature Data (EM bit = 1) ..........12
Table 3. Register Map ...............................................13
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
3
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Description
Features
o
CT75 is a digital temperature sensor with ±0.5 C
accuracy. Temperature data can be read out directly via
2
digital interface (compatible with SMBus, I C or 2-wire) by
MCU, Bluetooth Chip or SoC chip.
2
CT75 supports I C communication with speed up to 400
o
kHz. Each chip is specially calibrated for ±0.5 C(Max.)
o
o
accuracy over 0 C to 50 C range in factory before shipment
to customers. There is no need for re-calibration anymore
o
for ±0.5 C accuracy.
It includes a high precision band-gap circuit, a 12-bit
o
analog to digital converter that can offer 0.0625 C
resolution, a calibration unit with non-volatile memory, and
a digital interface block.
It has ALERT logic output pin with open drain structure,
which is selectable for active low or high by programming.
ALERT response is compatible with SMBus ALERT
Response Address (ARA).
Operation Voltage: 1.75V to 5.5V
Average Quiescent Current: 3.0uA (Typ.) (1Con/s)
Shutdown Current: 1.0uA (Typ.)
Temperature Accuracy without calibration:
o
o
o
Maximum:±0.5 C from 0 C to 50 C
o
o
o
Maximum:±1 C from -20 C to 85 C
o
o
o
Maximum:±1.5 C from -40 C to 125 C
o
12 bit ADC for 0.0625 C resolution
Compatible industry LM75 with performance
improved
2
Compatible with SMBus, 2-wire and I C interface
Programmable Over/Under Temperature
Programmable Active Low or High for ALERT pin
Support SMBus ALERT Response Address(ARA)
Generate 32 different slave address by setup A0, A1,
A2 pin
o
o
Temperature Range: -40 C to 125 C
Applications
CT75 can also be used as standalone thermostat.
Available Package: SOP-8/MSOP-8 and DFN3x3-8.
Smart HVAC System
Thermal Management
PIN Configurations (Top View)
SDA
VCC
SDA
VCC
SCL
A0
SCL
A0
ALERT
A1
ALERT
A1
GND
A2
GND
A2
SOP-8/MSOP-8(Package Code M/MM)
DFN3x3-8(package Code DN)
Typical Application
VCC
Rpu=10k for each resistor
CIN
0.1uF
VCC
A0
SCL
A1
SDA
A2
ALERT
to MCU I/O
GND
Figure 1. Typical Application of CT75
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
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CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Pin Description
PIN No.
PIN Name
Description
1
SDA
Digital interface data input or output pin, need a pull-up resistor to VCC.
2
SCL
Digital interface clock input pin, need a pull-up resistor to VCC.
3
ALERT
4
GND
5
A2
6
A1
7
A0
8
VCC
To Indicate ALERT of over or under Temperature programmed by setting THIGH/TLOW
register, it is open drain output with programmable active low or high. Need a pull-up
resistor to VCC in application.
Ground pin.
Address selection pins, the chip can be defined total 32 different slave address by
connecting these pins to GND, VCC, SCL or SDA pin respectively. Do not leave this
pins open. See 1.5.1 Slave Address for detail.
Power supply input pin, using 0.1uF low ESR ceramic capacitor to ground
Function Block
VCC
Regulator
SDA
SCL
Amplifer&
ADC
Digital
Logic &
Interface
ALERT
A0
Local TSensor
VREF
Calibration
Memory
A1
A2
GND
Figure 2. CT75 function block
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
5
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Ordering Information
CT75 X X
Order PN
Accuracy
CT75MR
±0.5 C
CT75MB
±0.5 C
CT75MMR
±0.5 C
CT75MMB
±0.5 C
CT75DNR
±0.5 C
Package Type
Packing
M : SOP-8
MM : MSOP-8
DN : DFN3x3-8
R : Tape & Reel
B : Tube
Green
1
o
Halogen free
o
Halogen free
o
Halogen free
o
Halogen free
o
Halogen free
Marking
Packing
Note 1
ID
75
SOP-8
Tape & Reel
YWWAXX
75
SOP-8
Tube
YWWAXX
75
MSOP-8
Tape & Reel
YWWAXX
75
MSOP-8
Tube
YWWAXX
75
DFN3x3-8
Tape & Reel
YWWAXX
Package
MPQ
Operation
Temperature
4,000
-40 C~+125 C
o
o
o
o
o
o
o
o
o
o
10,000 -40 C~+125 C
3,000
-40 C~+125 C
32,000 -40 C~+125 C
3,000
-40 C~+125 C
Notes 1
1. Based on ROHS Y2012 spec, Halogen free covers lead free. So most package types Sensylink offers only states halogen
free, instead of lead free.
st
nd
2. Marking ID includes 2 rows of characters. In general, the 1 row of characters are part number, and the 2 row of
characters are date code plus production information.
1) Generally, date code is represented by 3 numbers. The number stands for year and work week information. e.g.
501stands for the first work week of year 2015;621 stands for the 21st work week of year 2016.
2) Right after the date code information, the next 2-3 numbers or letters are specified to stands for supplier or
production location information.
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
6
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Absolute Maximum Ratings (Note 2)
Parameter
Symbol
Value
Unit
VCC to GND
-0.3 to 5.5
V
VSDA/VSCL/VA0/VA1/VA2 to GND
-0.3 to 5.5
V
VALERT to GND
-0.3 to 5.5
V
Storage temperature Range
TSTG
-65 to 150
ºC
Lead Temperature (Soldering, 10
Seconds)
TLEAD
260
ºC
ESD MM
ESDMM
400
V
ESD HBM
ESDHBM
4000
V
ESD CDM
ESDCDM
1000
V
Supply Voltage
SDA, SCL, A0, A1, A2 Voltage
ALERT Voltage
Note 2
1.
Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only. Functional operation of the device at the "Absolute Maximum Ratings" conditions or any
other conditions beyond those indicated under "Recommended Operating Conditions" is not recommended. Exposure to
"Absolute Maximum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
1.75 ~ 5.5
V
Ambient Operation Temperature Range
TA
-40 ~ +125
°C
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
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CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Electrical Characteristics (Note 3)
o
Test Conditions: CIN = 0.1uF, VCC = 3.3V,TA = -40 to 125 C unless otherwise specified. All limits are 100% tested
o
at TA=25 C.
Parameter
Supply Voltage
Symbol
VCC
Test Conditions
Min
1.75
o
Temperature Accuracy
TAC
TA = 0 to 50 C
o
TA = -20 to 85 C
o
TA = -40 to 125 C
Max
5.5
0.5
o
-1
-1.5
1
1.5
o
3.0
4.5
uA
1.0
3.0
uA
0.5
1.0
V
uA
0.0625
IAOC
Unit
V
-0.5
Temperature Resolution
Average Operating Current
Typ
VIN = 3.3V, 1.0 con/s
C
C
o
C
o
C
Open Drain Output Voltage
Open Drain Leakage
VOL
IODL
STB bit = 1, force SDA/SCL to VCC or
GND
ALERT pin, sink 5mA
ALERT pin
Conversion time
tCON
From active to finish completely
30
ms
Logic Input Capacitance
CIL
SDA, SCL pin
3.0
pF
Logic Input High Voltage
VIH
SDA, SCL pin
0.7*VCC
VCC+0.3
V
Logic Input Low Voltage
Logic Input Current
Logic Output Sink Current
VIL
IINL
IOLS
SDA, SCL pin
SDA, SCL pin
SDA, ALERT pin, forced 0.2V
-0.3
-1.0
0.3*VCC
1.0
V
uA
mA
Fast Mode
1
400
kHz
High Speed Mode
0.001
3
MHz
Shutdown Current
ISHUTDOWN
0
-1.0
Digital Interface
SCL frequency
Timeout of detecting clock low
period time
Clock low period time
Clock high period time
Bus free time
Hold time after Start condition
Repeated Start condition setup time
Stop condition setup time
Data Hold time
Data Setup time
Clock/Data fall time
Clock/Data rise time
fCLK
5.0
tTOUT
SMBus Communication
tLOW
tHIGH
tBUF
Fast Mode
Fast Mode
Between Stop and Start condition
tHD:STA
tSU:STA
tSU:STO
tHD:DAT
tSU:DAT
tF
tSR
30
ms
1300
600
1200
600
600
600
100
100
300
1000
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note 3:
1.
All devices are 100% production tested at TA = +25°C; All specifications over the automotive temperature range is
guaranteed by design, not production tested.
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
8
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
tF
SCL
VIH
tLOW
tHIGH
VIL
tR
tHD:DAT
tHD:STA
tSU:STA
tSU:DAT
tSU:STO
SDA
VIH
tBUF
VIL
P
S
P
S
2
Figure 3. SMBus/I C Timing Diagram
SCL
1
8
9
1
8
9
...
SDA
A6
1
A5
0
A4
0
A3
1
A2
0
A1
0
A0
0
R/W
0
R7
R6
R5
R4
R3
R2
R1
...
R0
ACK
ACK
S
Byte 1
Slave Address (0x90h)
Byte 2
Register Address (0x00h to 0x03h)
1
SCL(cont)
...
SDA(cont)
...
D15
8
D14
D13
D12
D11
D10
D9
9
D8
10
D7
17
D6
D5
D4
D3
ACK
D2
D1
18
D0
NACK
P
Byte 3, Byte 4
Data to be written into Register (address pointed in Byte2)
2
Figure 4. SMBus/I C Write Word (2-Bytes) Timing Diagram
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
9
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
SCL
1
8
9
1
8
9
...
SDA
A6
1
A5
0
A4
0
A3
1
A2
0
A1
0
A0
0
R/W
0
R7
R6
R5
R4
R3
R2
R1
...
R0
ACK
ACK
S
P
Byte 1
Slave Address (0x90h)
Byte 2
Register Address (0x00h to 0x03h)
1
SCL
(cont)
8
9
1
8
9
...
SDA
(cont)
A6
1
...
A5
0
A4
0
A3
1
A2
0
A1
0
A0
0
R/W
1
D7
D6
D5
D4
D3
D2
D1
D0
ACK
ACK
S
Byte 4 (1st Byte)
Data to be read out (Register address pointed in Byte2)
Byte 3
Slave Address (0x91h)
1
8
9
SCL
(cont)
...
SDA
(cont)
D7
...
D6
D5
D4
D3
D2
D1
D0
NACK
P
Byte 5 (2st Byte)
Data to be read out (Register address pointed in Byte2)
2
Figure 5. SMBus/I C Read Word (2-Bytes) Timing Diagram
SCL
1
8
9
1
8
9
SDA
A6
0
A5
0
A4
0
A3
1
A2
1
A1
0
A0
0
R/W
1
1
0
x
x
x
x
x
ACK
ALT
NACK
S
P
Byte 1
SMBus Alert Response Address (0x19h)
Byte 2
Device Slave Address (10xx, xxxALT)
Figure 6. SMBus ALERT Response Diagram
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
10
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Characteristics (VCC=3.0V/5.0V)
+ 2.0
+5.0
1#
2#
3#
4#
5#
6#
7#
8#
9#
10#
11#
12#
13#
14#
15#
16#
17#
18#
UL
LL
upper limit
o
Temperature Accuracy ( C)
+ 1.0
+ 0.5
0.0
-0.5
-1.0
lower limit
-1.5
-2.0
-60
+4.5
o
Ta = 25 C, Shutdown Mode
+4.0
Shutdown Current (uA)
+ 1.5
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5
0.0
-40
-20
0
20
40
60
80
100
120
140
1
o
Ambient Temperature ( C)
2
3
4
5
6
Supply Voltage (V)
Figure 9. Shutdown Current vs. Supply Voltage
Figure 7. Temperature Accuracy vs. Temperature
+4.0
In Shutdown Mode
VCC=1.8V
VCC=3.3V
VCC=5.0V
+3.5
Shutdown Current (uA)
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5
0.0
-40
-20
0
20
40
60
80
100
120
140
o
Ambient Temperature ( C)
Figure 10. Temperature Error Distribution
Figure 8. Shutdown Current vs. Temperature
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
11
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
1
Function Descriptions
The chip can sense temperature and convert it into digital data by a 12-bit ADC. Also the chip supports programmable
high-/low-limit temperature settings. If the measured temperature meets or exceeds the high-limit temperature, ALERT
pin will be asserted (be set low or high, depending on POL bit of configuration register).Once the measured temperature
goes below the low-limit temperature (programmable by user), ALERT pin will be released (comparator mode).
1.1
Digital Output of Temperature Data
The temperature measurement data is stored in read only temperature register. The temperature register is in
12-bit binary format (set EM bit as '0') or 13-bit binary format (set EM bit as '1') with 2-Bytes. This 2-Bytes
st
nd
temperature data must be read at the same time in each reading cycle, 1 -Byte is MSB followed by 2 -Byte, the
LSB. The relationship between temperature data in Celsius degree and binary data is shown as below tables.
Table 1. 12-bit Temperature Data (EM bit = 0)
Temperature (°C)
12-bit Digital Output (HEX)
12-bit Digital Output (BIN)
+128.000
0x7FF0
0 1 1 1, 1 1 1 1, 1 1 1 1 (0 0 0 0)
+127.9375
0x7FF0
0 1 1 1, 1 1 1 1, 1 1 1 1 (0 0 0 0)
+100.000
0x6400
0 1 1 0, 0 1 0 0, 0 0 0 0 (0 0 0 0)
+25.000
0x1900
0 0 0 1, 1 0 0 1, 0 0 0 0 (0 0 0 0)
+0.250
0x0040
0 0 0 0, 0 0 0 0, 0 1 0 0 (0 0 0 0)
0.000
0x0000
0 0 0 0, 0 0 0 0, 0 0 0 0 (0 0 0 0)
-0.0625
0xFFF0
1 1 1 1, 1 1 1 1, 1 1 1 1 (0 0 0 0)
-0.250
0xFFC0
1 1 1 1, 1 1 1 1, 1 1 0 0 (0 0 0 0)
-25.000
0xE700
1 1 1 0, 0 1 1 1, 0 0 0 0 (0 0 0 0)
Table 2. 13-bit Temperature Data (EM bit = 1)
+150.000
13-bit Digital
Output (HEX)
0x4B01
8-bit Digital Output (BIN)
st
(MSB) 1 Byte
0 1 0 0, 1 0 1 1
5-bit Digital Output (BIN)
nd
(LSB) 2 Byte
0 0 0 0, 0 (0 0 1)
+128.000
0x4001
0 1 0 0, 0 0 0 0
0 0 0 0, 0 (0 0 1)
+127.9375
0x3FF9
0 0 1 1, 1 1 1 1
1 1 1 1, 1 (0 0 1)
+100.000
0x3201
0 0 1 1, 0 0 1 0
0 0 0 0, 0 (0 0 1)
+25.000
0x0C81
0 0 0 0, 1 1 0 0
1 0 0 0, 0 (0 0 1)
+0.250
0x0021
0 0 0 0, 0 0 0 0
0 0 1 0, 0 (0 0 1)
0.000
0x0001
0 0 0 0, 0 0 0 0
0 0 0 0, 0 (0 0 1)
-0.0625
0xFFF9
1 1 1 1, 1 1 1 1
1 1 1 1, 1 (0 0 1)
-0.250
0xFFE1
1 1 1 1, 1 1 1 1
1 1 1 0, 0 (0 0 1)
-25.000
0xF381
1 1 1 1, 0 0 1 1
1 0 0 0, 0 (0 0 1)
Temperature (°C)
1.2
Temperature Higher than 128
When temperature is higher than 128°
C, it can be expressed in binary register data by setting EM bit as '1',
shown as above Table 2. In extended format, the resolution of AD converter does not change, but '+128' bit is
st
added. For example, 12-bit format for 100°
C is 0x6400, in which 0x64 is from 1 Byte, and 0x00 is from 2
st
13-bit format for 100°
C is 0x3201, in which 0x32 is from 1 Byte, and 0x01 is from 2
nd
nd
Byte.
Byte. The default for EM
bit is '0' after Power-on reset.
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
12
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
1.3
Register Map
st
nd
The chip has 4 registers assigned address from 0x00 to 0x03, and there are 2 Bytes (1 Byte and 2
Byte), total
16 bits for each register, shown as below table.
Table 3. Register Map
Register
Address
0x00Note 4
0x01
0x02 Note 4
0x03 Note 4
Register Name
Attrib Default
ution Data
Temp_MSB
(1st Byte)
Temp_LSB
(2nd Byte)
Config_MSB
(1st Byte)
Config_LSB
(2nd Byte)
Low_Temp_Set_MSB
(1st Byte)
Low_Temp_Set_LSB
(2nd Byte)
High_Temp_Set_MSB
(1st Byte)
High_Temp_Set_LSB
(2nd Byte)
BIT
7
6
5
4
3
2
1
0
R/O
N/A
Temp_Data[11:4]
R/O
N/A
Temp_Data[3:0]
R/W
0x00
OS
CR1
CR0
F1
F0
POL
ALTM
SD
R/W
0x00
0
0
AL
EM
0
0
0
0
R/W
0x4B
Low_Temp_Setup_Data[11:4]
R/W
0x00
Low_Temp_Setup_Data[3:0]
R/W
0x50
High_Temp_Setup_Data[11:4]
R/W
0x00
High_Temp_Setup_Data[3:0]
Note 4, if set EM as '1', Temp data is expressed in 13-bit format, 1st Byte, 8 bits data [12:5] is used as MSB, and 2nd
Byte, 5 bits data [4:0] in left justified is used as LSB.
1.4
Register Description
1.4.1 Temp_Data, Temperature Data
Register Address: 0x00
Register Attribution: Read only
Default Data: N/A
BIT (1st Byte)
Name: Temp_MSB (1st Byte)
Temperature Data (oC) [12-bit]
12-bit format
Temperature Data (oC) [13-bit]
13-bit format
7
6
5
SIGN
T11
(SIGN)
(T12)
64
T10
(128)
(T11)
32
T9
(64)
(T10)
BIT (2nd Byte)
Name: Temp_LSB (2ndByte)
Temperature Data (oC) [12-bit]
12-bit format
Temperature Data (oC) [13-bit]
7
6
5
0.5
T3
(1)
0.25
T2
(0.5)
0.125
T1
(0.25)
13-bit format
(T4)
(T3)
(T2)
4
3
Temp_Data[11:4]
16
8
T8
T7
(32)
(16)
(T9)
(T8)
4
3
Temp_Data[3:0]
0.0625
0
T0
0
(0.125) (0.0625)
(T1)
(T0)
2
1
0
4
T6
(8)
(T7)
2
T5
(4)
(T6)
1
T4
(2)
(T5)
2
1
0
0
0
0
0
0
0
0
0
(1)
(0)
(0)
(1)
1.4.2 Config, Configuration Setup register
Register Address: 0x01
Register Attribution: Read/Write
st
Default Data: 0x00 for 1 Byte, 0x20 for 2
nd
Byte after POR. If user used only 1-Byte, it is ok to read/write 1st
Byte command via digital interface; the only 1 Byte (MSB) will be accessed.
BIT
st
1 Byte
2nd Byte
7
OS
0
6
CR1
0
Reserved
0
0
5
CR0
0
AL
1
4
F1
0
EM
0
Apr. 2020 Rev. 2.3
3
F0
0
0
2
1
POL
ALTM
0
0
Reserved
0
0
0
SD
0
0
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CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
OS, One shot Conversion bit
When the device is in shutdown mode, setting this bit as ‘1’ will trigger a single time temperature conversion.
During the conversion, the OS bit reads as ‘0’. The device returns to shutdown mode once it completes the
single conversion. This feature is used for reducing power consumption when continuous temperature
monitoring is not necessary.
CR1, CR0, Conversion Rate Selection bits
These 2 bits allow user to setup different conversion rate for temperature. The default is 00 after POR,
meaning the conversion rate is 8Hz, i.e. 8 times conversion every second.
CR1
0
0
1
1
CR0
0
1
0
1
Conversion Rate / Conversion Time
8.0Hz / 0.125s (default)
4.0Hz / 0.25s
1.0Hz / 1.0s
0.25Hz / 4.0s
F1, F0, Fault Queue bits
These 2 bits are used to setup the number of fault conditions to trigger alert. The default is 00 after POR,
which means one time fault. This feature is used to prevent a false alert, which is immune to certain noise in
application.
F1
F0
Fault Queue Number
0
0
1
1
0
1
0
1
1 (default)
2
4
6
POL, Alert Output Polarity bit
This bit allows user to setup the polarity of ALERT pin for output. The default is 0 after POR, meaning
ALERT pin is active low. When POL bit is set as ‘1’, the ALERT pin becomes active high and the state of
ALERT pin is inverted.
ALTM, Alert Operation Mode bit
This bit allows user to select ALERT pin operation mode: Comparator Mode or Interrupt Mode. The default
is 0 after POR to select Comparator Mode. For detail information, see ALERT output section.
SD, Shutdown bit
This bit allows user to shut down the chip and to make the chip enter into standby mode once writing ‘1’.
The default value is ‘0’, which sets the chip to be in Normal working mode. During shutdown mode, the
temperature data is kept as those of last time, no anymore update, and all function blocks are turned-off
except interface. Set this bit as '0' can allow the chip be out of shutdown mode. In shutdown mode, the
operation current is about 1.0uA in typical.
Apr. 2020 Rev. 2.3
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CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
EM, Extended Mode bit
This bit allows user to select 12-bit (EM = 0) or 13-bit (EM = 1) temperature data. When EM bit is set as ‘1’,
o
the temperature resolution is still 0.0625 C resolution. However, the expression range is extended from 255 to +255.
AL, Alert Status bit
The AL bit indicates the Alert status with read-only attribution. In addition, this bit is always read as the
inversion of POL bit. When the POL bit equals 0, the AL bit reads as 1 until the measured temperature
equals or exceeds Temperature (HIGH) for the programmed number of consecutive faults, causing the AL
bit to read as 0. The AL bit continues to read as 0 until the temperature falls below Temperature (LOW) for
the programmed number of consecutive faults, when it again reads as 1. Vice versa, when the POL bit is '1',
the AL bit reads as 0 until the temperature equals or exceeds Temperature (HIGH). And the AL bit is set as
0 again once the temperature falls below Temperature (LOW). The status of the TM bit does not affect the
status of the AL bit.
1.4.3 Low_Temp_Set, Setup Low Temperature Limitation register
Register Address: 0x02
Register Attribution: Read/Write
st
Default Data: 0x4B (1 Byte) 0x00 (2
BIT
st
1 Byte
2
nd
Byte
BIT
12-bit
13-bit
Default
12-bit
13-bit
Default
7
L11
(L12)
0
L3
(L4)
0
nd
Byte) after POR.
6
L10
(L11)
1
L2
(L3)
0
5
L9
(L10)
0
L1
(L2)
0
4
L8
(L9)
0
L0
(L1)
0
3
L7
(L8)
1
0
(L0)
0
2
L6
(L7)
0
0
(0)
0
1
L5
(L6)
1
0
(0)
0
0
L4
(L5)
1
0
(0)
0
The high-/low- limit temperature data is determined by High_Temp_Set register [0x03] and Low_Temp_Set
register [0x02] with same format as Temp_Data register [0x00], which could be in 12-bit or 13-bit binary
format. The chip compares Temp_Data [0x00] register and High_Temp_Set register [0x03]/Low_Temp_Set
register [0x02] in each conversion cycle, which will affect ALT pin output. The default value is 0x4B00 with
o
12-bit binary format, which means 75 C. For other low-limit temperature data chip, please contact our sales.
1.4.4 High_Temp_Set, Setup High Temperature Limitation register
Register Address: 0x03
Register Attribution: Read/Write
st
Default Data: 0x50 (1 Byte) 0x00 (2
BIT
st
1 Byte
2
nd
Byte
BIT
12-bit
13-bit
Default
12-bit
13-bit
Default
7
H11
(H12)
0
H3
(H4)
0
nd
Byte) after POR.
6
H10
(H11)
1
H2
(H3)
0
5
H9
(H10)
0
H1
(H2)
0
Apr. 2020 Rev. 2.3
4
H8
(H9)
1
H0
(H1)
0
3
H7
(H8)
0
0
(H0)
0
2
H6
(H7)
0
0
(0)
0
1
H5
(H6)
0
0
(0)
0
0
H4
(H5)
0
0
(0)
0
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CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
The high-/low- limit temperature data is determined by High_Temp_Set register [0x03] and Low_Temp_Set
register [0x02] with same format as Temp_Data register [0x00], which could be in 12-bit or 13-bit binary
format. The chip compares Temp_Data [0x00] register and High_Temp_Set register [0x03]/Low_Temp_Set
register [0x02] in each conversion cycle, which will affect ALT pin output. The default value is 0x5000 with
o
12-bit binary format, which means 80 C. For other low-limit temperature data chip, please contact our sales.
1.5
SMBus Digital Interface
1.5.1 Slave Address
2
The SMBus or I C slave address of this device can be configured 32 different addresses by setting [A2],
[A1] and [A0] pin. See below table for detail, which permit connecting total 32 devices in one SMBus.
No.
A2
A1
A0
R/W
Slave Address in Hex [R/W]
1
GND
GND
GND
1/0
0x91/0x90
2
GND
GND
VCC
1/0
0x93/0x92
3
GND
VCC
GND
1/0
0x95/0x94
4
GND
VCC
VCC
1/0
0x97/0x96
5
VCC
GND
GND
1/0
0x99/0x98
6
VCC
GND
VCC
1/0
0x9B/0x9A
7
VCC
VCC
GND
1/0
0x9D/0x9C
8
VCC
VCC
VCC
1/0
0x9F/0x9E
9
GND
GND
SDA
1/0
0x81/0x80
10
GND
GND
SCL
1/0
0x83/0x82
11
GND
VCC
SDA
1/0
0x85/0x84
12
GND
VCC
SCL
1/0
0x87/0x86
13
VCC
GND
SDA
1/0
0x89/0x88
14
VCC
GND
SCL
1/0
0x8B/0x8A
15
VCC
VCC
SDA
1/0
0x8D/0x8C
16
VCC
VCC
SCL
1/0
0x8F/0x8E
17
GND
SDA
SDA
1/0
0xA1/0xA0
18
GND
SDA
SCL
1/0
0xA3/0xA2
19
GND
SCL
SDA
1/0
0xA5/0xA4
20
GND
SCL
SCL
1/0
0xA7/0xA6
21
VCC
SDA
SDA
1/0
0xA9/0xA8
22
VCC
SDA
SCL
1/0
0xAB/0xAA
23
VCC
SCL
SDA
1/0
0xAD/0xAC
24
VCC
SCL
SCL
1/0
0xAF/0xAE
25
GND
SDA
GND
1/0
0xB1/0xB0
26
GND
SDA
VCC
1/0
0xB3/0xB2
27
GND
SCL
GND
1/0
0xB5/0xB4
28
GND
SCL
VCC
1/0
0xB7/0xB6
29
VCC
SDA
GND
1/0
0xB9/0xB8
30
VCC
SDA
VCC
1/0
0xBB/0xBA
31
VCC
SCL
GND
1/0
0xBD/0xBC
32
VCC
SCL
VCC
1/0
0xBF/0xBE
1.5.2 Timeout
The chip supports SMBus timeout. If the data (SDA PIN) or clock (SCL PIN) is held low for longer than
30ms (Typ.), the chip will reset its SMBus protocol and be ready for a new transmission.
Apr. 2020 Rev. 2.3
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CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
1.5.3 SMBus Protocol
The chip supports four standard SMBus protocols Send Byte, Read Byte, Write Byte and Receive Byte,
shown as below tables.
Write Byte
S
Slave Add
R/W
ACK
Reg Add
ACK
Reg Data
ACK
0x80 to 0xBE
0
0
0x00 to 0x03
0
XXh
0
P
Read Byte
S
Slave Add
R/W
0x80 to 0xBE 0
ACK
Reg Add
0
0x00 to 0x03 0
ACK S
Slave Add
R/W
0x80 to 0xBE 1
ACK
Reg Data NACK P
0
XXh1
1
Send Byte
S
Slave Add
R/W
ACK
Reg Add
ACK
0x80 to 0xBE
0
0
XXh
0
Slave Add
R/W
ACK
Reg Add
NACK
0x80 to 0xBE
1
0
XXh
1
P
Receive Byte
S
P
Here S means SMBus Start to communication; P, means communication STOP.
Slave Add, means the chip's slave address.
Reg Add, means pointed register address.
Reg Data, means data to be written into register or read from register.
For this chip, each register includes 2 Bytes, so generally reading or writing operation is based on 1 Word (2-Bytes).Also
it is permitted to read 1 byte for read/write, then the 1st byte will be accessed in first.
2
1.5.4 Compatible with I C
2
2
The chip is compatible with both SMBus and I C. The major difference between SMbus and I C are shown
2
as below. For more information, refer to SMBus specification v2.0 and I C specification v2.1.
2
1). Besides DC specification difference, this chip supports I C fast mode (400kHz) and standard mode
(100kHz), which can cover SMBus maximum frequency 100kHz. For SMBus protocol, the minimum
2
frequency is 10 kHz. There is no such limitation for I C.
2). For SMBus protocol, the communication will be reset if holding clock or data low with duration over
2
30ms (Typ.). There is no timeout for I C.
2
3). ARA (Alert Response Address) general call is only valid interrupt in SMBus, not valid in I C.
1.5.5 General Call
The CT75 device responds to a two-wire general-call address (0000 000) if the eighth bit is 0. The device
acknowledges the general-call address and responds to commands in the second byte. If the second byte
is 0000 0110, the CT75 internal registers are reset to power-up values.
1.5.6 High-Speed (Hs) Mode
2
If the master needs to run at frequencies above 400 kHz in I C, the master device must issue an Hs-mode
master code (0000 1xxx) as the first byte after a START condition to switch the bus to high-speed operation.
After the Hs-mode master code has been issued, the master transmits a slave address to initiate a datatransfer operation. The bus continues to operate in Hs-mode until a STOP condition occurs on the bus.
Apr. 2020 Rev. 2.3
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17
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Upon receiving the STOP condition, the CT75 device will return to fast-mode operation. below is the
example for reading operation in high speed mode.
S
1.6
Hs-mode
Slave Add R/W
code
0x08
to 0x80
to
0
0x0F
0xBE
ACK
Reg Add
0
0x00
0x03
to
ACK Sr
Slave Add
0
0x80
0xBE
to
R/W
ACK
Reg
Data
NACK P
1
0
XXh
1
ALERT Output
ALERT pin is output with open drain, which can be set active low or active high by setting POL bit. In addition,
this pin is triggered when the measured temperature equals or exceeds the high-limitation temperature setup in
the registers of High_Temp_Set. There are two types of ALERT output mode: comparator mode and interrupt
mode.
1.6.1 Comparator mode (ALTM = 0)
Below Figure shows the mechanism of the ALERT output in comparator mode. In this mode, the ALERT pin
will becomes active if the monitored temperature equals or exceeds the value setup in High_Temp_Set
[0x03] register for a consecutive number of faults according to setup by F1 and F0 bits. The ALERT pin
keeps active until the temperature falls below the value setup in Low_Temp_Set [0x02] register.
Measured
temperature
THIGH Limitation
THERM_HYS
TLOW Limitation
ALERT PIN
(Comparator Mode)
POL = 0
ALERT PIN
(Comparator Mode)
POL = 1
Figure 11 ALERT pin output in comparator mode
1.6.2 Interrupt mode (ALTM = 1)
Below Figure shows the mechanism of the ALERT pin output in interrupt mode. In this mode, the ALERT
pin becomes active when the temperature equals or exceeds the value setup in High_Temp_Set [0x03]
register for a consecutive number of faults according to setup by F1 and F0 bits. The ALERT pin keeps
active until a read operation of any register happens or the chip responds to SMBus Alert Response
Address (ARA) successfully. When ALERT pin is cleared, it will become active again only when the
temperature falls below the value setup in Low_Temp_Set [0x02] register, and keeps active until being
cleared by reading register or responding to SMBus ARA, ALERT pin is also cleared by setting the chip in
shutdown mode.
Apr. 2020 Rev. 2.3
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18
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Measured
temperature
THIGH Limitation
THERM_HYS
TLOW Limitation
ALERT PIN
(Interrupt Mode)
POL = 0
ALERT PIN
(Interrupt Mode)
POL = 1
Reading Register to SMBus ARA
Figure 12 ALERT pin output in interrupt mode
1.6.3 SMBus Alert Response Address (ARA)
The chip supports the SMBus alert function feature. When the chip operates in interrupt mode (ALTM=1), it
can be connected as SMBus alert signal, used as a processer interrupt or as SMBus ALERT. When the
master detects that the ALERT pin is asserted, it will send Alert Response Address (ARA) to general
address (0001, 1001b). All devices with active interrupts will respond with client address. If the alert pin is
active, the device acknowledges the SMBus command by returning the slave address from SDA line. If
more devices than one on the bus respond SMBus ARA, arbitration during the slave address portion of
SMBus ARA determines which device clears the alert trigger. The device with the highest priority (lowest
address) wins the arbitration. If the chip wins the arbitration, ALERT pin is released after completion of
SMBus ARA command. If the chip loses the arbitration, it will keep ALERT pin active. See System
Management Bus (SMBus) Specification for more detail. Below Figure shows the mechanism of the ALERT
output SMBus Alert mode.
S
Slave Add
R/W
ACK
Reg Add
ACK
0001,100
1
0
100x,xxxS
1
P
Here Reg Add presented the chip real actual address setup by user. S bit indicates if the alert condition is caused by the
temperature exceeding T(HIGH) or falling below T(LOW). The S bit is '1' if the temperature is greater than T(HIGH), or '0'
if the temperature is less than T(LOW).
Apr. 2020 Rev. 2.3
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19
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Measured
temperature
THIGH Limitation
THERM_HYS
TLOW Limitation
ALERT pin active
ALERT pin (Interrupt Mode)
POL=0
ALERT pin inactive
ALERT pin (Interrupt Mode)
POL=1
Reading register or SMBus ARA
Figure 13 ALERT pin in SMBus Alert Response (ARA)
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
20
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
2
Application Information
2.1
How to Improve Temperature Accuracy
The temperature measurement of the chip is based on semiconductor physics principle --Forward voltage
of diode is a function of temperature. The formula is shown as below.
VF
kT I F
ln
q IS
Here,
VF -- forward voltage
IF -- forward current
IS -- reverse saturation current
k -- Boltzmann constant
T -- Temperature in K
q -- Electric charge constant
To cover wide temperature range, i.e. -40 oC to 125oC, a very small voltage variation is corresponding to
every degree C temperature change. Sensylink has applied many ways to improve measurement accuracy
in chip circuits design, such as compensation, trimming etc. In real system design, however, some factors
that can increase measurement error need to be considered. Most issues that usually occur are highlighted
as below.
2.1.1 Noise between VCC and GND
It is very necessary to place a low ESR ceramic cap (CIN) between VCC and GND pin to filter digital
noise, although suppression noise circuit has been built inside the chip. This filter cap should be
placed as close as possible to the chip. The recommended capacitance is 0.1uF.
2.1.2 Thermal Response Time
It is very necessary to wait enough time for obvious temperature changing of target due to
o
o
thermal time constant, e.g. food temperature could change from -20 C to 20 C when taken out of
refrigerator, which could take over ten minutes to reach thermal equilibrium eventually. Enough
time is still needed for the target to reach thermal equilibrium, even forcing temperature transient
into target object. For this chip, the temperature step response changing from room temperature
o
to oil bath of 125 C is shown as below. (Based on SOP-8 package)
Room Temperature
o
26.8 C
Target Temperature
o
125.0 C
Apr. 2020 Rev. 2.3
Change ratio
63%
80%
90%
100%
Delta T
o
61.9 C
o
78.5 C
o
88.4 C
o
98.2 C
Time (s)
2.3
3.8
5.6
20.0
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21
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
150
140
o
From room temperature to 125 C oil bath
130
120
o
Temperature ( C)
110
100
90
80
70
60
50
40
30
20
10
3.8
7.8
11.8
15.8
19.8
23.8
Time(s)
Vice versa, it will take longer time, about 150s, when the chip temperature is back to room
o
temperature, once taking the chip out of oil bath of 125 C. See below plot.
150
140
o
From 125 C oil bath to room temperature
130
120
o
Temperature ( C)
110
100
90
80
70
60
50
40
30
20
10
-20
0
20
40
60
80
100
120
140
160
Time(s)
2.2
PCB Layout
Cautions below are important to improve temperature measurement accuracy in PCB layout design.
2.2.1 Device placement
It is better to place the chip away from any thermal source (e.g. power device in board), highspeed digital bus (e.g. memory bus), coil device (e.g. inductors) and wireless antenna (e.g.
Bluetooth, WiFi, and RF). It is recommended to place the chip close to the remote diode.
2.2.2 Cin, Pull-up resistor
It is better to place Cin as close as possible to VCC and GND pins of the chip. The
recommended Cin value is 0.1uF with low ESR ceramic cap although using multi caps, such as
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
22
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
1.0uF plus 0.1uF or 0.01uF, is ok, which can suppress digital noise with different frequency
range.
User has to put a pull-up resistor with 4.7k to 10k for SDA and SCL pins respectively. It is ok to
use smaller resistors such as 2k-3k in real application, if multi slave devices are used in the
same bus.
2.3
Standalone Thermostat
CT75 can also be used as standalone thermostat shown as below. It does not need external
MCU to setup High/Low limitation temperature via SMBus/I2C communication. The trigger
temperature and hysteresis temperature can be setup in factory before shipping to customer. For
example,
o
o
Trigger temperate is 55 C, and Hysteresis temperature is 5 C.
o
Which means when the chip temperature equals or exceeds 55 C, the ALERT pin will be set low.
o
And once the temperature of the chip drops below 50 C (55 - 5), the ALERT pin will be released
back to high (pulled by Rpu to VCC).
Please contact Sensylink sales for specific Trigger, Hysteresis temperature you want.
VCC
CIN
0.1uF
Rpu=4.7k - 10k
A0
A1
VCC
A2
SCL
ALERT
SDA
GND
Apr. 2020 Rev. 2.3
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23
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Package Outline Dimensions (SOP-8)
SOP-8
Unit (mm)
θ
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Dimensions in Millimeters
Min.
Max.
1.350
1.750
0.100
0.250
1.250
1.650
0.33
0.51
0.17
0.25
4.700
5.100
5.800
6.200
3.700
4.100
1.270（BSC）
0.400
1.270
0°
8°
Apr. 2020 Rev. 2.3
Dimensions in Inches
Min.
Max.
0.053
0.069
0.004
0.010
0.049
0.065
0.013
0.020
0.007
0.010
0.185
0.201
0.228
0.244
0.146
0.161
0.050（BSC）
0.016
0.050
0°
8°
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24
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Package Outline Dimensions (MSOP-8)
MSOP-8
Unit (mm)
c
L
E
E1
θ
A2
A
b
e
D
A1
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Dimensions in Millimeters
Min.
Max.
0.820
1.100
0.020
0.150
0.750
0.950
0.250
0.380
0.090
0.250
2.900
3.100
2.900
3.100
4.700
5.100
0.650（BSC）
0.400
0.800
0°
8°
Apr. 2020 Rev. 2.3
Dimensions in Inches
Min.
Max.
0.032
0.043
0.001
0.006
0.030
0.037
0.010
0.015
0.004
0.010
0.114
0.122
0.114
0.122
0.185
0.201
0.026（BSC）
0.016
0.031
0°
8°
SENSYLINK Microelectronics Co., LTD
25
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Package Outline Dimensions (DFN3x3-8)
DFN3x3-8
D
Unit (mm)
e
N8
K
N5
L
E
E1
D1
N4
b
N1
Bottom View
A1
A
A3
Top View
0.08
Side View
Symbol
A
A1
A3
D
E
D1
E1
k
b
e
L
Dimensions in Millimeters
Min.
Max.
0.700
0.800
0.000
0.050
0.203REF.
2.900
3.100
2.900
3.100
2.200
2.600
1.400
1.800
0.250MIN.
0.250
0.350
0.650TYP.
0.200
0.400
Apr. 2020 Rev. 2.3
Dimensions in Inches
Min.
Max.
0.028
0.031
0.000
0.002
0.008REF
0.114
0.122
0.114
0.122
0.087
0.102
0.055
0.071
0.010REF
0.010
0.014
0.026TYP
0.008
0.016
SENSYLINK Microelectronics Co., LTD
26
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
Revision History
Version
Date
Change Content
Ver1.0
2017/05
Initial
Ver1.1
2017/10
update characteristics plots
Ver1.2
2018/01
Add DFN package
Ver1.3
2018/07
Update register description
Ver1.4
2018/11
Update Sensylink Logo
Ver1.5
2018/12
Update ordering information
Ver1.6
2019/01
Update shutdown current
Ver1.7
2019/02
Update timeout description
Ver1.8
2019/03
Update voltage range
Ver1.9
2019/06
Update Slave Address
Ver2.0
2019/09
Update Time Out
Ver2.1
2019/10
Update Hold Time
Ver2.2
2019/12
Update Current
Ver2.3
2020/04
Update Packing Outline Dimensions
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
27
CT75
SENSYLINK
±0.5oC Digital Temperature Sensor with Digital Interface
SENSYLINK
SENSYLINK Microelectronics Co., Ltd
www.sensylink.com
IMPORTANT NOTICE
SENSYLINK Microelectronics Co., Ltd reserves the right to make modifications, enhancements, improvements, corrections or
other changes without further notice to this document and any product described here in or to discontinue any product or
service. Customers should obtain the latest relevant information before placing orders and should verify the latest and
complete information. SENSYLINK Microelectronics does not assume any responsibility for use of any product, nor does
SENSYLINK Microelectronics any liability arising out of the application or use of this document or any product or circuit
described herein. SENSYLINK Microelectronics assumes no liability for applications assistance or the design of Customers’
products. Customers are responsible for their products and applications using SENSYLINK Microelectronics components.
SENSYLINK Microelectronics does not convey any license under its patent or trademark rights nor the other rights.
SENSYLINK Microelectronics Co., Ltd©2020.
Apr. 2020 Rev. 2.3
SENSYLINK Microelectronics Co., LTD
28
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