SHT31 Humidity Sensor: Pinout, Datasheet and Advantages
SENSOR HUMID/TEMP 5V I2C 2% SMD
SHT31 is the next generation of Sensirion’s temperature and humidity sensors. This article mainly covers datasheet, pinout, features, advantages, and other details about SHT31.

SHT31 Temperature/Humidity Sensor and Rasperry Pi Zero W - Test and Review (#127)
SHT31 Pinout

Pinout
| Pin | Name | Comments |
| 1 | SDA | Serial data; input / output |
| 2 | ADDR | Address pin; input; connect to either logic high or low, do not leave floating |
| 3 | ALERT | Indicates alarm condition; output; must be left floating if unused |
| 4 | SCL | Serial clock; input / output |
| 5 | VDD | Supply voltage; input |
| 6 | nRESET | Reset pin active low; input; if not used it is recommended to be left floating; can be connected to VDD with a series resistor of R ≥2 kΩ |
| 7 | R | No electrical function; to be connected to VSS |
| 8 | VSS | Ground |
Pinout Description
SHT31 CAD Model
Symbol

Symbol
Footprint

Footprint
3D Model

3D Model
SHT31 Description
SHT31 is the next generation of Sensirion’s temperature and humidity sensors. It builds on a new CMOSens® sensor chip that is at the heart of Sensirion’s new humidity and temperature platform. The SHT3x-DIS has increased intelligence, reliability, and improved accuracy specifications compared to its predecessor. Its functionality includes enhanced signal processing, two distinctive and user-selectable I2C addresses, and communication speeds of up to 1 MHz.
SHT31 Block Diagram

Block Diagram
Specifications
- TypeParameter
- Factory Lead Time4 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
DFN - Number of Pins8
- Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Cut Tape - Published2014
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Max Operating Temperature
The Maximum Operating Temperature is the maximum body temperature at which the thermistor is designed to operate for extended periods of time with acceptable stability of its electrical characteristics.
125°C - Min Operating Temperature
The "Min Operating Temperature" parameter in electronic components refers to the lowest temperature at which the component is designed to operate effectively and reliably. This parameter is crucial for ensuring the proper functioning and longevity of the component, as operating below this temperature may lead to performance issues or even damage. Manufacturers specify the minimum operating temperature to provide guidance to users on the environmental conditions in which the component can safely operate. It is important to adhere to this parameter to prevent malfunctions and ensure the overall reliability of the electronic system.
-40°C - Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Digital, I2C - Operating Supply Voltage
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
3.3V - Interface
In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.
I2C - Max Supply Voltage
In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.
5.5V - Min Supply Voltage
The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.
2.15V - Accuracy
Accuracy in electronic components refers to the degree to which a measured value agrees with the true or accepted value. It evaluates the precision of a component in providing correct output or measurement under specified conditions. High accuracy indicates minimal deviation from the actual value, while low accuracy shows significant error in measurement. This parameter is crucial in applications where precise data is essential for reliable performance and decision-making.
2 % - Response Time
the time taken for a circuit or measuring device, when subjected to a change in input signal, to change its state by a specified fraction of its total response to that change.
8 s - Sensor Type
In electronic components, the parameter "Sensor Type" refers to the specific type of sensor technology used in a particular component to detect and measure physical phenomena such as light, temperature, pressure, motion, or proximity. Different sensor types utilize various principles and mechanisms to convert the detected input into an electrical signal that can be processed by the electronic component. Common sensor types include photodiodes, thermistors, accelerometers, and proximity sensors, each designed for specific applications and environments. Understanding the sensor type is crucial for selecting the right component for a given task and ensuring accurate and reliable sensing capabilities in electronic systems.
Temperature - Height1mm
- Length2.6mm
- Width2.6mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
RoHS Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
SHT31 Features
Fully calibrated, linearized, and temperature compensated digital output
Wide supply voltage range, from 2.4 V to 5.5 V
I2C Interface with communication speeds up to 1 MHz and two user-selectable addresses
Typical accuracy of ±1.5 %RH and ±0.1 °C for SHT35
Very fast start-up and measurement time
Tiny 8-Pin DFN package
SHT31 Advantages
High reliability and long-term stability
Industry-proven technology with a track record of more than 15 years
Designed for mass production
High process capability
High signal-to-noise ratio
SHT31 Application Circuit

Application Circuit
SHT11 vs. DHT11
Different humidity-sensitive parts
SHT11: The core components of SHT11 use humidity-sensitive capacitors, which have high costs and good stability.
DHT11: The core component of DHT11 adopts humidity sensitive resistor, which has low cost and poor stability.
Different contain
SHT11: SHT11 includes a humidity sensor and a temperature sensor made of energy gap material.
DHT11: DHT11 includes a humidity sensor and an NTC temperature measuring element, and is connected with a high-performance 8-bit single-chip microcomputer.
Different function
SHT11: SHT11 can provide temperature-compensated humidity measurement and high-quality dew point calculation functions.
DHT11: DHT11 can provide temperature-compensated humidity measurement values, but cannot provide high-quality dew point calculation functions.
SHT31 Package


Package
SHT31 Manufacturer
Sensirion is the leading manufacturer of high-quality sensors and sensor solutions for the measurement and control of humidity, and gas and liquid flows.
Datasheet PDF
- Datasheets :
What is SHT31 used for?
SHT31 is a highly reliable, accurate, quick response, and integrated temperature & humidity sensor. The sensor (chip) used in the module is designed with Sensirion's CMOSens® technology. The chip is well-calibrated, linearized, and compensated for digital output.
What are the advantages of SHT31 temperature and humidity sensor?
It combines multiple functions and various interfaces (I2C, voltage output) and a friendly, wide operating voltage range (2.4 to 5.5V). These sensors are suitable for a variety of high-volume and small-volume applications.
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