www.sensirion.com Version 1 – July 2018 1/13
Datasheet SHTC3
Humidity and Temperature Sensor IC
Ultra-low power consumption
Full battery supply voltage range (1.62 - 3.6 V)
Small DFN package: 2 × 2 × 0.75 mm3
Typical accuracy: ±2 %RH and ±0.2 °C
Fully calibrated and reflow solderable
Power-up and measurement within 1 ms
Benefits of Sensirion’s CMOSens® Technology
High reliability and long-term stability
Industry-proven technology with a track record of
more than 15 years
Designed for mass production
Optimized for lowest cost
High signal-to-noise ratio
Contents of this Data Sheet
1 Humidity and Temperature Sensor
Specifications ............................................................ 2
2 Electrical Specifications ..................................... 3
3 Timing Specifications......................................... 4
4 Interface Specifications ..................................... 6
5 Operation and Communication .......................... 6
6 Quality ............................................................... 9
7 Packaging and Traceability ............................... 9
8 Ordering Information.......................................... 9
9 Technical Drawings ......................................... 10
10 Further Information .......................................... 11
Block diagram
Figure 1 Functional block diagram of the SHTC3.
RH sensor
T sensor
Signal conditioning
Signal conditioning
ADC
I2C interface
Calibration mem.
VDD
VSS
SDA
SCL
analog
digital
Product Summary
The SHTC3 is a digital humidity and temperature sensor
designed especially for battery-driven high-volume
consumer electronics applications. This sensor is strictly
designed to overcome conventional limits for size, power
consumption, and performance to price ratio in order to
fulfill current and future requirements. Sensirion’s
CMOSens® technology offers a complete sensor system
on a single chip, consisting of a capacitive humidity sensor,
a bandgap temperature sensor, analog and digital signal
processing, A/D converter, calibration data memory, and a
digital communication interface supporting I2C Fast Mode
Plus. The small 2 × 2 × 0.75 mm3 DFN package enables
applications in even the most limited of spaces.
The sensor covers a humidity measurement range of 0 to
100 %RH and a temperature measurement range of
- 40 °C to 125 °C with a typical accuracy of ±2 %RH and
±0.2°C. The broad supply voltage of 1.62 V to 3.6 V and
an energy budget below 1 µJ per measurement make the
SHTC3 suitable for mobile or wireless applications
powered by batteries. With the industry-proven quality and
reliability of Sensirion’s humidity and temperature sensors
and constant accuracy over a large measurement range,
the SHTC3 offers best performance-to-price ratio. Tape
and reel packaging together with suitability for standard
SMD assembly processes make the SHTC3 predestined
for high-volume applications.
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1 Humidity and Temperature Sensor Specifications
Relative Humidity
Parameter
Condition
Value
Unit
Accuracy tolerance1
Typ.
2.0
%RH
Max.
see Figure 2
%RH
Repeatability2
-
0.1
%RH
Resolution3
-
0.01
%RH
Hysteresis
-
1
%RH
Specified range4
extended5
0 to 100
%RH
Response time6
63%
8
s
Long-term drift7
Typ.
<0.25
%RH/y
Table 1 Humidity sensor specifications.
Figure 2 Typical and maximal tolerance for relative humidity in %RH
at 25 °C.
1
For definition of typ. and max. accuracy tolerance, please refer to the document
“Sensirion Humidity Sensor Specification Statement”. Specification applies to
normal mode.
2
The stated repeatability is 3 times the standard deviation (3σ) of multiple
consecutive measurement values at constant conditions and is a measure for the
noise on the physical sensor output. Specification applies to normal mode.
3
Resolution of A/D converter. Specification applies to normal mode.
4
Specified range refers to the range for which the humidity or temperature sensor
specification is guaranteed.
5
For details about recommended humidity and temperature operating range, please
refer to section 1.2.
Temperature
Parameter
Condition
Value
Unit
Accuracy tolerance1
Typ.
0.2
°C
Max.
see Figure 3
°C
Repeatability2
-
0.1
°C
Resolution3
-
0.01
°C
Specified range4
-
–40 to +125
°C
Response time8
63%
<5 to 30
s
Long-term drift 9
Typ.
<0.02
°C/y
Table 2 Temperature sensor specifications.
Figure 3 Typical and maximal tolerance for temperature sensor in
°C.
6
Time for achieving 63% of a humidity step function, valid at 25°C and 1 m/s
airflow. Humidity response time in the application depends on the design-in of
the sensor.
7
Typical value for operation in normal RH/T operating range. Max. value is <
0.5 %RH/y. Value may be higher in environments with vaporized solvents, out-
gassing tapes, adhesives, packaging materials, etc. For more details please
refer to Handling Instructions.
8
Temperature response time depends on heat conductivity of sensor
substrate and design-in of sensor in application.
9
Max. value is < 0.04°C/y.
±0
±2
±4
±6
010 20 30 40 50 60 70 80 90 100
ΔRH [%RH]
Relative humidity [%RH]
Maximum accuracy
Typical Accuracy
±0
±0.4
±0.8
±1.2
±1.6
-40 -20 0 20 40 60 80 100 120
ΔT [C]
Temperature [°C]
Maximum Accuracy
Typical Accuracy
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1.1 RH Accuracy at Various Temperatures
Typical RH accuracy at 25°C is defined in Figure 2. For
other temperatures, typical accuracy has been evaluated to
be as displayed in Figure 4.
Figure 4 Typical accuracy of relative humidity measurements given
in %RH for temperatures 0°C … 80°C.
1.2 Recommended Operating Conditions
The sensor performs best when operated within the
recommended normal temperature and humidity range of 5 –
60 °C and 20 – 80 %RH, respectively. Long-term exposure to
conditions outside the normal range, especially at high
humidity, may temporarily offset the RH signal (e.g. +3%RH
after 60h at >80%RH). After returning to normal temperature
and humidity range the sensor will slowly come back to its
calibration state by itself. Prolonged exposure to extreme
conditions may accelerate ageing.
To ensure stable operation of the humidity sensor, the
conditions described in the document “SHTxx Assembly of
SMD Packages”, section “Storage and Handling Instructions”
regarding exposure to volatile organic compounds have to be
met. Please note as well that this does apply not only to
transportation and manufacturing, but also to operation of the
SHTC3.
2 Electrical Specifications
2.1 Electrical Characteristics
Default conditions of 25 °C and 3.3 V supply voltage apply to values in the table below, unless otherwise stated.
Parameter
Symbol
Conditions
Min
Typ.
Max
Units
Comments
Supply voltage
VDD
1.62
3.3
3.6
V
-
Power-up/down level
VPOR
Static power supply
1.28
1.4
1.55
V
-
Supply current
IDD
Idle state
-
45
70
µA
After power-up the sensor
remains in the idle state unless
a sleep command is issued or
other data transmission is active
Sleep Mode
-
0.3
0.6
µA
When in sleep mode, the sensor
requires a dedicated wake-up
command to enable further I2C
communication
Measurement
Normal Mode
-
430
900
µA
Average current consumption
while the sensor is measuring
Low Power M.
-
270
570
µA
Average
Normal Mode
-
4.9
-
µA
Average current consumption
(continuous operation with one
measurement per second)
Low Power M.
-
0.5
-
µA
Average current consumption
(continuous operation with one
measurement per second)
Low level input voltage
VIL
-
-
-
0.42 VDD
V
-
High level input voltage
VIH
-
0.7 VDD
-
-
V
-
Low level output voltage
VOL
3 mA sink current
-
-
0.2 VDD
V
-
Table 3 Electrical specifications.
100 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3.5 ±4 ±4
90 ±3.5 ±3 ±2.5 ±2.5 ±2.5 ±2.5 ±3 ±3.5 ±4
80 ±3 ±2.5 ±2 ±2 ±2 ±2.5 ±2.5 ±3 ±3.5
70 ±3 ±2.5 ±2 ±2 ±2 ±2 ±2.5 ±2.5 ±3
60 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2.5 ±2.5
50 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2 ±2.5
40 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2 ±2
30 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2 ±2
20 ±2.5 ±2.5 ±2 ±2 ±2 ±2 ±2 ±2 ±2
10 ±3 ±3 ±2.5 ±2.5 ±2.5 ±2.5 ±2.5 ±2.5 ±2.5
0 ±3.5 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3
010 20 30 40 50 60 70 80
Relative Humidity [%RH]
Temperature [°C]
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2.2 Absolute Maximum Ratings
Stress levels beyond the limits listed in Table 4 may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these conditions cannot be guaranteed. Exposure to the absolute maximum rating conditions
for extended periods may affect the reliability of the device. Parameters are only tested each at a time.
Parameter
Rating
Supply voltage, VDD
-0.3 to +4 V
Operating temperature range
-40 to +125 °C
Storage temperature range10
-40 to +125 °C
ESD HBM (human body model)11
-2 to 2 kV
ESD CDM (change device model)12
-500 to 500 V
Latch up, JESD78 Class II, 125°C
-100 to 100 mA
Table 4 Absolute maximum ratings.
3 Timing Specifications
3.1 Sensor System Timings
Default conditions of 25 °C and 3.3 V supply voltage apply to values the table below, unless otherwise stated. Max. values are
measured at -40 °C.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Comments
Power-up time
tPU
After hard reset, VDD ≥ VPOR
-
180
240
µs
Time between VDD reaching VPU
and sensor entering the idle
state
Soft reset time
tSR
After soft reset.
-
180
240
µs
Time between ACK of soft reset
command and sensor entering
the idle state
Measurement duration
tMEAS
Average
Normal Mode
-
10.8
12.1
ms
Duration for a humidity and
temperature measurement
Low Power M.
-
0.7
0.8
Table 5 System timing specifications.
10
The recommended storage temperature range is 10-50°C. Please consult the document “SHTxx Handling Instructions” for more information.
11
According to ANSI/ESDA/JEDEC JS-001-2014; AEC-Q100-002.
12
According to ANSI/ESD S5.3.1-2009; AEC-Q100-011.
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3.2 Communication Timings
Default conditions of 25 °C and 3.3 V supply voltage apply to values in the table below, unless otherwise stated.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Comments
SCL clock frequency
fSCL
-
0
-
1
MHz
-
Hold time (repeated) START
condition
tHD;STA
After this period, the first
clock pulse is generated
260
-
-
ns
-
LOW period of the SCL clock
tLOW
-
500
-
-
ns
-
HIGH period of the SCL clock
tHIGH
-
260
-
-
ns
-
Set-up time for a repeated
START condition
tSU;STA
-
260
-
-
ns
-
SDA hold time
tHD;DAT
-
0
-
-
-
-
SDA set-up time
tSU;DAT
-
50
-
-
ns
-
SCL/SDA rise time
tR
-
-
-
120
ns
-
SCL/SDA fall time
tF
-
-
-
120
ns
-
SDA valid time
tVD;DAT
-
-
-
400
ns
-
Set-up time for STOP
condition
tSU;STO
-
260
-
-
ns
-
Capacitive load on bus line
CB
-
-
-
550
pF
-
Table 6 Communication timing specifications. The numbers above are values according to the I2C Fast Mode Plus specification.
Figure 5 Timing diagram for digital input/output pads. SDA directions as seen from the sensor. Bold SDA lines are controlled by the sensor,
plain SDA lines are controlled by the micro-controller. Note that SDA valid read time is triggered by falling edge of preceding toggle.
SCL
70%
30%
tLOW
1/fSCL
tHIGH
tR
tF
SDA
70%
30%
tSU;DAT
tHD;DAT
DATA IN
tR
SDA
70%
30%
DATA OUT
tVD;DAT
tF
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4 Interface Specifications
The SHTC3 supports I2C Fast Mode Plus (SCL clock
frequency from 0 to 1 MHz) with clock stretching. For
detailed information on the I2C protocol, refer to NXP I2C-
bus specification and user manual UM10204, Rev. 6, April
4th, 2014.
The SHTC3 comes in a 4-pin package – see Table 7.
Pin
Name
Comments
1
VDD
Supply voltage
2
SCL
Serial clock, bidirectional
3
SDA
Serial data, bidirectional
4
VSS
Ground
Table 7 SHTC3 pin assignment (top view). The center pad is
internally connected to VSS.
Power-supply pins supply voltage (VDD) and ground (VSS)
must be decoupled with a 100 nF capacitor that shall be
placed as close to the sensor as possible – see Figure 6.
SCL is used to synchronize the communication between the
microcontroller and the sensor. The master must keep the
clock frequency within 0 to 1 MHz as specified in Table 6.
The SHTC3 may pull down the SCL line when clock
stretching is enabled.
The SDA pin is used to transfer data in and out of the
sensor. For safe communication, the timing specifications
defined in the I2C manual must be met.
To avoid signal contention, the microcontroller must only
drive SDA and SCL low. External pull-up resistors (e.g.
10 kΩ) are required to pull the signal high. For
dimensioning resistor sizes please take the bus capacity
requirements into account. Note that pull-up resistors may
be included in I/O circuits of microcontrollers.
Figure 6 Typical application circuit, including pull-up resistors RP
and decoupling of VDD and VSS by a capacitor.
For good performance of the SHTC3 in the application, the
center pad of the SHTC3 offers the best thermal contact to
13
If an immediate sensor signal is desired, sending the sensor to sleep mode
can be omitted. Not sending the sensor to sleep mode for an extended amount
of time keeps up the current consumption of the sensor.
the temperature sensor. For more information on design-in,
please refer to the document “SHTxx Design Guide”.
For mechanical reasons the center pad should be soldered.
Electrically, the center pad is internally connected to GND
and may be connected to the GND net on the PCB
additionally.
5 Operation and Communication
All commands and memory locations of the SHTC3 are
mapped to a 16-bit address space which can be accessed
via the I2C protocol.
5.1 I2C Address
The I2C device address is given Table 8:
SHTC3
Hex. Code
Bin. Code
I2C address
0x70
111’0000
Table 8 SHTC3 I2C device address.
Each transmission sequence begins with START condition
(S) and ends with an (optional) STOP condition (P) as
described in the I2C-bus specification.
5.2 Power-Up, Sleep, Wakeup
Upon VDD reaching the power-up voltage level VPOR, the
SHTC3 enters the idle state after a duration of tPU. After that,
the sensor should be set to sleep mode with the command
given in Table 9
13
.
Command
Hex. Code
Bin. Code
Sleep
0xB098
1011’0000’1001’1000
Table 9 Sleep command of the sensor.
When the sensor is in sleep mode, it requires the following
wake-up command before any further communication, see
Table 10:
Command
Hex. Code
Bin. Code
Wakeup
0x3517
0011’0101’0001’0111
Table 10 Wake-up command of the sensor.
5.3 Measurement Commands
The SHTC3 provides a clock-stretching option and the
order of the signal return can be selected. These
parameters are selected by dedicated measurement
commands as summarized in Table 11. N. B.: Each
measurement command triggers always both, a
temperature and a relative humidity measurement.
2
1
3
4
SHTC3
AXY89
SDA
SCL
GND
VDD
MCU (master)
RP
RP
SCL OUT
SDA OUT
SDA IN
SCL IN
C = 100 nF
SHTC3
(slave)
SHTC3
AXY89
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Clock Stretching
Enabled
Clock Stretching
Disabled
Read T
First
Read RH
First
Read T
First
Read RH
First
Normal Mode
0x7CA2
0x5C24
0x7866
0x58E0
Low Power
M.
0x6458
0x44DE
0x609C
0x401A
Table 11 Measurement commands.
5.4 Measuring and Reading the Signals
Each measurement cycle contains a set of four commands,
each initiated by the I2C START condition and ended by the
I2C STOP condition:
1. Wakeup command
2. Measurement command
3. Read out command
4. Sleep command
An exemplary measurement set is shown in Figure 7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
S
ACK
ACK
ACK
P
SHTC3 wake up
1
1
1
0
0
0
0
0
0
0
1
1
0
1
0
1
0
0
0
1
0
1
1
1
I2C address + write
Wakeup command MSB
Wakeup command LSB
Wakeup time see Table 5
28
29
30
31
32
33
34
35
36
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
ACK
ACK
ACK
P
SHTC3 measuring
S
1
1
1
0
0
0
0
0
0
1
0
1
1
1
0
0
0
0
1
0
0
1
0
0
I2C address + write
Measurement command MSB
Measurement command LSB
Measurement in progress
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
S
NACK
P
SHTC3 measuring
SHTC3 in idle
state
S
ACK
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
repeated I2C address + read
while meas. is in prog. (polling)
measurement cont’d
measurement
completed
I2C address + read
56
57
58
59
60
61
62
63
64
S
ACK
SHTC3 measuring,
SCL line pulled low
1
1
1
0
0
0
0
1
I2C address + read
while meas. is in progress
measurement continued
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
ACK
ACK
ACK
1
0
1
0
0
0
0
1
0
0
1
1
0
0
1
1
0
0
0
1
1
1
0
0
Humidity MSB
Humidity LSB
Humidity CRC checksum
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
ACK
ACK
ACK
P
0
1
1
0
0
1
0
0
1
0
0
0
1
0
1
1
1
1
0
0
0
1
1
1
Temperature MSB
Temperature LSB
Temperature CRC checksum
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
S
ACK
ACK
ACK
P
1
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
1
0
0
1
1
0
0
0
I2C address + write
Sleep command MSB
Sleep command LSB
Figure 7 Communication sequence for waking up the sensor, starting a measurement and reading measurement results displaying both
clock stretching options.
The numerical example corresponds to a read humidity-first command with clock stretching enabled. The physical values of the transmitted
measurement results are 63 %RH and 23.7 °C. Clear blocks are controlled by the microcontroller, grey blocks by the SHTC3.
clock stretching
disabled
clock
stretching enabled
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5.5 Sensor Behavior during Measurement and
Clock Stretching
In general, the sensor does not respond to any I2C activity
during measurement, i.e. I2C read and write headers are not
acknowledged (NACK). However, when clock stretching
has been enabled by using a corresponding measurement
command, the sensor responds to a read header with an
ACK and subsequently pulls down the SCL line until the
measurement is complete. As soon as the measurement is
complete, the sensor starts sending the measurement
results.
During measurement, the sensor has a current
consumption according to Table 3.
For best possible repeatability of humidity and temperature
measurements, it is recommended to avoid any
communication on the I2C bus while the SHTC3 is
measuring. For more information, see the application note
“Optimization of Repeatibility”.
5.6 Readout of Measurement Results
After a measurement command has been issued and the
sensor has completed the measurement, the master can
read the measurement results by sending a START
condition followed by an I2C read header. The sensor will
acknowledge the reception of the read header and send two
bytes of data followed by one byte CRC checksum and
another two bytes of data followed by one byte CRC
checksum. Each byte must be acknowledged by the
microcontroller with an ACK condition for the sensor to
continue sending data. If the SHTC3 does not receive an
ACK from the master after any byte of data, it will not
continue sending data.
The I2C master can abort the read transfer with a NACK
condition after any data byte if it is not interested in
subsequent data, e.g. the CRC byte or the second
measurement result, in order to save time.
In case the user needs humidity and temperature data but
does not want to process CRC data, it is recommended to
read the first two bytes of data with the CRC byte (without
processing the CRC data) and abort the read transfer after
reading the second two data bytes with a NACK. This
procedure is more time efficient than starting two different
measurements and aborting the read transfer after the first
two data bytes each time.
5.7 Soft Reset
The SHTC3 provides a soft reset mechanism that forces
the system into a well-defined state without removing the
power supply. If the system is in its idle state (i.e. if no
measurement is in progress) the soft reset command can
be sent to SHTC3 according to Table 12. This triggers the
14
http://www.nxp.com/documents/user_manual/UM10204.pdf
sensor to reset all internal state machines and reload
calibration data from the memory.
Command
Hex. Code
Bin. Code
Software reset
0x805D
1000’0000’0101’1101
Table 12 Soft reset command.
5.8 Reset through General Call
Additionally, a reset of the sensor can also be generated
using the “general call” mode according to I2C-bus
specification
14
. This generates a reset which is functionally
identical to using the nReset pin. It is important to
understand that a reset generated in this way is not device
specific. All devices on the same I2C bus that support the
general call mode will perform a reset. Additionally, this
command only works when the sensor is able to process
I2C commands. The appropriate command consists of two
bytes and is shown in Table 13.
Command
Code
Address byte
0x00
Second byte
0x06
Reset command using the
general call address
0x0006
Table 13 Reset through the general call address (clear blocks are
controlled by the microcontroller, grey blocks by the sensor)
5.9 Read-out of ID Register
The SHTC3 has an ID register which contains an SHTC3-
specific product code. The read-out of the ID register can
be used to verify the presence of the sensor and proper
communication. The command to read the ID register is
shown in Table 14.
Command
Hex. Code
Bin. Code
Read ID register
0xEFC8
1110’1111’1100’1000
Table 14 Read-out command of ID register.
It needs to be sent to the SHTC3 after an I2C write header.
Once the SHTC3 has acknowledged the proper reception
of the command, the master can send an I2C read header
and the SHTC3 submits the 16-bit ID followed by 8 bits of
CRC. The structure of the ID is described in Table 15.
S
ACK
General Call Address
1 2 3 4 5 6 7 8 9
ACK
Reset Command
1 2 3 4 5 6 7 8 9
General Call 1st byte General Call 2nd byte
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16-bit ID
bits 15 to 12 & 10 to 6: unspecified info.
xxxx' 1 xxx’xx 00’0111
bits 11 & 5 to 0: SHTC3 identifier.
Table 15 Structure of the 16-bit ID. Bits 15:12 & 10:6 of the ID
contain unspecified information (marked as “x”), which may vary
from sensor to sensor, while bits 11 & 5:0 contain the SHTC3-
specific product code.
5.10 Checksum Calculation
The 8-bit CRC checksum transmitted after each data word
is generated by a CRC algorithm with the properties
displayed in Table 16. The CRC covers the contents of the
two previously transmitted data bytes.
Property
Value
Name
CRC-8
Width
8 bits
Polynomial
0x31 (x8 + x5 + x4 + 1)
Initialization
0xFF
Reflect input
False
Reflect output
False
Final XOR
0x00
Examples
CRC (0x00) = 0xAC
CRC (0xBEEF) = 0x92
Table 16 SHTC3 I2C CRC properties.
5.11 Conversion of Sensor Output
Measurement data is always transferred as 16-bit values.
These values are already linearized and temperature
compensated by the SHTC3. Humidity and temperature
values can be calculated with the formulas in given below.
Relative humidity conversion formula (result in %RH):
16
RH
2
S
100 RH
Temperature conversion formula (result in °C):
16
T
2
S
175 45 T
SRH and ST denote the raw sensor output (as decimal
values) for humidity and temperature, respectively.
6 Quality
6.1 Environmental Stability
Qualification of the SHTC3 is performed based on the
JEDEC JESD47 qualification test method.
6.2 Material Contents
The device is fully RoHS, REACH and Halogen-Free
compliant, e.g. free of Pb, Cd, and Hg.
7 Packaging and Traceability
SHTC3 sensors are provided in a DFN package with an
outline of 2 × 2 × 0.75 mm3 and a terminal pitch of 1 mm.
DFN stands for dual flat no leads. The humidity sensor
opening is centered on the top side of the package.
The sensor chip is made of silicon and is mounted to a lead
frame. The latter is made of Cu plated with Ni/Pd/Au. Chip
and lead frame are overmolded by an epoxy-based mold
compound. Please note that the sidewalls of sensor are
diced and therefore these diced lead frame surfaces are not
covered with the respective plating.
The Moisture Sensitivity Level classification of the SHTC3
is MSL1, according to IPC/JEDEC J-STD-020.
All SHTC3 sensors are laser marked for easy identification
and traceability. The marking on the sensor consists of two
lines and a pin-1 indicator. The top line contains the sensor
type (SHTC3), the bottom line contains a 5-digit,
alphanumeric tracking code. The pin-1 indicator is located
in the top left corner. See Figure 8 for illustration.
Figure 8 Laser marking on SHTC3, the top line with the pin-1
indicator and the sensor type, the bottom line with the 5-digit
alphanumeric tracking code.
Reels are also labeled and provide additional traceability
information.
8 Ordering Information
The SHTC3 can be ordered in tape and reel packaging with
different sizes, see Table 17. The reels are sealed into
antistatic ESD bags. A drawing of the packaging tape with
sensor orientation is shown in Figure 11.
Quantity
Packaging
Reel Diameter
Order Number
2500
Tape & Reel
180 mm (7 inch)
3.000.047
10’000
Tape & Reel
330 mm (13 inch)
1-101681-01
Table 17 SHTC3 ordering options.
SHTC3
XXXXX
www.sensirion.com Version 1 – July 2018 10/13
9 Technical Drawings
9.1 Package Outline
Figure 9 Package outline drawing of the SHTC3. Dimensions are given in millimeters.
9.2 Metal Land Pattern
Figure 10 Recommended metal land pattern for SHTC3 (all dimensions are in mm). Recommended solder paste stencil thickness is 100µm,
pads on PCB are recommended to be non solder mask defined (NSMD).
0.75
1.6
1
0.7
0.2x45°
0.35
0.35
2
2
* Mold opening shows smooth transition to package surface. Therefore
this dimension is not well defined and given for reference only.
www.sensirion.com Version 1 – July 2018 11/13
9.3 Tape and Reel Package
Figure 11 Technical drawing of the packaging tape with sensor orientation in tape. Header tape is to the right and trailer tape to the left on
this drawing. Dimensions are given in millimeters.
10 Further Information
For more in-depth information on the SHTC3 and its application please consult the following documents:
Document Name
Description
Source
SHTxx Assembly of SMD
Packages
Instructions on soldering and processing of the
SHTC3 in a production environment
Available for download from the SHTC3 product
website:
www.sensirion.com/humidity-download
SHTxx Design Guide
Design guidelines for designing SHTxx humidity
sensors into applications
Available for download at the Sensirion humidity
sensors download center:
www.sensirion.com/humidity-download
SHTxx Handling Instructions
Guidelines for proper handling of SHTxx humidity
sensors
Available for download at the Sensirion humidity
sensors download center:
www.sensirion.com/humidity-download
Sensirion Humidity Sensor
Specification Statement
Definition of sensor specifications.
Available for download at the Sensirion humidity
sensors download center:
www.sensirion.com/humidity-download
Table 18 Documents containing further information relevant for the SHTC3.
www.sensirion.com Version 1 – July 2018 12/13
Revision History
Date
Version
Page(s)
Changes
July 2018
1
all
Initial version
www.sensirion.com Version 1 – July 2018 13/13
Important Notices
Warning, Personal Injury
Do not use this product as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury. Do not use this
product for applications other than its intended and
authorized use. Before installing, handling, using or
servicing this product, please consult the data sheet and
application notes. Failure to comply with these instructions
could result in death or serious injury.
If the Buyer shall purchase or use SENSIRION products for any
unintended or unauthorized application, Buyer shall defend,
indemnify and hold harmless SENSIRION and its officers,
employees, subsidiaries, affiliates and distributors against all
claims, costs, damages and expenses, and reasonable attorney
fees arising out of, directly or indirectly, any claim of personal
injury or death associated with such unintended or unauthorized
use, even if SENSIRION shall be allegedly negligent with
respect to the design or the manufacture of the product.
ESD Precautions
The inherent design of this component causes it to be sensitive
to electrostatic discharge (ESD). To prevent ESD-induced
damage and/or degradation, take customary and statutory ESD
precautions when handling this product.
See application note “ESD, Latchup and EMC” for more
information.
Warranty
SENSIRION warrants solely to the original purchaser of this
product for a period of 12 months (one year) from the date of
delivery that this product shall be of the quality, material and
workmanship defined in SENSIRION’s published specifications
of the product. Within such period, if proven to be defective,
SENSIRION shall repair and/or replace this product, in
SENSIRION’s discretion, free of charge to the Buyer, provided
that:
notice in writing describing the defects shall be given to
SENSIRION within fourteen (14) days after their
appearance;
such defects shall be found, to SENSIRION’s reasonable
satisfaction, to have arisen from SENSIRION’s faulty
design, material, or workmanship;
the defective product shall be returned to SENSIRION’s
factory at the Buyer’s expense; and
the warranty period for any repaired or replaced product
shall be limited to the unexpired portion of the original
period.
This warranty does not apply to any equipment which has not
been installed and used within the specifications recommended
by SENSIRION for the intended and proper use of the
equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY
SET FORTH HEREIN, SENSIRION MAKES NO
WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH
RESPECT TO THE PRODUCT. ANY AND ALL WARRANTIES,
INCLUDING WITHOUT LIMITATION, WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED.
SENSIRION is only liable for defects of this product arising
under the conditions of operation provided for in the data sheet
and proper use of the goods. SENSIRION explicitly disclaims all
warranties, express or implied, for any period during which the
goods are operated or stored not in accordance with the
technical specifications.
SENSIRION does not assume any liability arising out of any
application or use of any product or circuit and specifically
disclaims any and all liability, including without limitation
consequential or incidental damages. All operating parameters,
including without limitation recommended parameters, must be
validated for each customer’s applications by customer’s
technical experts. Recommended parameters can and do vary
in different applications.
SENSIRION reserves the right, without further notice, (i) to
change the product specifications and/or the information in this
document and (ii) to improve reliability, functions and design of
this product.
Copyright © 2018, by SENSIRION.
CMOSens® is a trademark of Sensirion
All rights reserved
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