ST3485EBDR Transceiver: Features, Applications and Datasheet
8 Terminations 3.3V 16 Pin ST3485 Receivers 1 Bits 1/1 Drivers/Receivers 1 Functions









8 Terminations 3.3V 16 Pin ST3485 Receivers 1 Bits 1/1 Drivers/Receivers 1 Functions
The STMicroelectronics ST3485EBDR is a device that can be used for RS-485 and RS-422 communication protocols. This article will introduce its features, applications and datasheet.
ST3485EBDR Description
The STMicroelectronics ST3485EBDR is a device that can be used for RS-485 and RS-422 communication protocols. It is a transceiver, which means it can both transmit and receive data. It has a high level of protection against electrostatic discharge (ESD), which can damage electronic components. It can operate with a low power supply of 3.3 V and achieve a fast data rate of up to 12 Mbps. It is available in a small SO8 package and has an automotive grade option.
ST3485EBDR Features
It is a transceiver for RS-485 and RS-422 communication protocols, which are widely used for industrial and automotive applications.
It has a high level of protection against electrostatic discharge (ESD), which can damage electronic components. It can withstand ±15 kV ESD according to the human body model and ±8 kV ESD according to the IEC 61000-4-2 contact discharge standard.
It can operate with a low power supply of 3.3 V and achieve a fast data rate of up to 12 Mbps12.
It has a low current shutdown mode that consumes only 1 µA max.
It has a wide common mode input voltage range of -7 to 12 V, which allows it to tolerate noise and ground potential differences.
It has a current limiting and thermal shutdown feature that protects the driver from overload and excessive power dissipation.
It has an industry standard 75176 pinout and is available in a small SO8 package.
It has an automotive grade option (ST3485EIY) that meets the specifications of the AEC-Q100 standard
Specifications
- TypeParameter
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
ACTIVE (Last Updated: 7 months ago) - Factory Lead Time10 Weeks
- Contact Plating
Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.
Gold - 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 - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
8-SOIC (0.154, 3.90mm Width) - Number of Pins16
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C - 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 (CT) - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e4 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations8
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - TypeTransceiver
- Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
3V~3.6V - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
GULL WING - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
260 - Number of Functions1
- Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
3.3V - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
30 - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
ST3485 - Pin Count
a count of all of the component leads (or pins)
8 - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
R-PDSO-G8 - 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 - Number of Channels2
- 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.
RS-422, RS-485 - Nominal Supply Current
Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.
2.2mA - Max Supply Current
Max Supply Current refers to the maximum amount of electrical current that a component can draw from its power supply under normal operating conditions. It is a critical parameter that ensures the component operates reliably without exceeding its thermal limits or damaging internal circuitry. Exceeding this current can lead to overheating, performance degradation, or failure of the component. Understanding this parameter is essential for designing circuits that provide adequate power while avoiding overload situations.
2.2mA - Data Rate
Data Rate is defined as the amount of data transmitted during a specified time period over a network. It is the speed at which data is transferred from one device to another or between a peripheral device and the computer. It is generally measured in Mega bits per second(Mbps) or Mega bytes per second(MBps).
15Mbps - Differential Output
a differential output voltage in electronics is the difference between the values of two AC voltages, 180° out of phase, present at the output terminals of an amplifier when you apply a differential input voltage to the input terminals of an amplifier.
YES - Protocol
In electronic components, the parameter "Protocol" refers to a set of rules and standards that govern the communication between devices. It defines the format, timing, sequencing, and error checking methods for data exchange between different components or systems. Protocols ensure that devices can understand and interpret data correctly, enabling them to communicate effectively with each other. Common examples of protocols in electronics include USB, Ethernet, SPI, I2C, and Bluetooth, each with its own specifications for data transmission. Understanding and adhering to protocols is essential for ensuring compatibility and reliable communication between electronic devices.
RS422, RS485 - Input Characteristics
In electronic components, "Input Characteristics" refer to the set of specifications that describe how the component behaves in response to signals or inputs applied to it. These characteristics typically include parameters such as input voltage, input current, input impedance, input capacitance, and input frequency range. Understanding the input characteristics of a component is crucial for designing circuits and systems, as it helps ensure compatibility and proper functioning. By analyzing these parameters, engineers can determine how the component will interact with the signals it receives and make informed decisions about its use in a particular application.
DIFFERENTIAL SCHMITT TRIGGER - Number of Drivers/Receivers1/1
- Driver Number of Bits1
- Receiver Number of Bits1
- Duplex
In the context of electronic components, "Duplex" refers to a type of communication system that allows for bidirectional data flow. It enables two devices to communicate with each other simultaneously, allowing for both sending and receiving of data at the same time. Duplex communication can be further categorized into two types: half-duplex, where data can be transmitted in both directions but not at the same time, and full-duplex, where data can be sent and received simultaneously. This parameter is crucial in networking and telecommunications systems to ensure efficient and effective data transmission between devices.
Half - Receiver Hysteresis
Receiver hysteresis is?commonly used to ensure glitch-free reception even when differential noise is present. This application report compares the noise immunity of the SN65HVD37 to similar devices available from competitors. Contents.
70mV - Number of Transceivers1
- ESD Protection
ESD protection, or Electrostatic Discharge protection, is a feature in electronic components designed to prevent damage caused by sudden electrostatic discharges. These discharges can occur when a person or object with an electric charge comes into contact with a sensitive electronic component, leading to a rapid flow of static electricity that can damage or destroy the component. ESD protection mechanisms in electronic components typically involve the use of special materials or circuitry that can safely dissipate or divert the excess charge away from the sensitive components, thus safeguarding the device from potential harm. Implementing effective ESD protection is crucial in ensuring the reliability and longevity of electronic devices, especially in environments where static electricity buildup is common, such as in manufacturing facilities or areas with low humidity.
Yes - Receive Delay-Max
Receive Delay-Max is a parameter in electronic components that refers to the maximum amount of time it takes for a device to receive and process incoming signals or data after they have been transmitted. This parameter is crucial in determining the overall performance and efficiency of the component, especially in applications where timing is critical. A lower Receive Delay-Max value indicates faster response times and better overall performance, while a higher value may result in delays and potential issues in data transmission. It is important to consider and optimize the Receive Delay-Max parameter when designing or selecting electronic components for specific applications to ensure reliable and efficient operation.
50 ns - Transmit Delay-Max
Transmit Delay-Max refers to the maximum time interval it takes for a signal to be transmitted from the input to the output of an electronic component or system. This parameter is critical in digital circuits and communication systems, as it affects the overall performance and timing of data transmission. A lower Transmit Delay-Max indicates faster signal propagation, which is essential for high-speed applications. It is typically specified in nanoseconds or microseconds, depending on the technology and design of the component.
30 ns - Output Low Current-Max
Output Low Current-Max is a parameter in electronic components that specifies the maximum amount of current that can flow out of the output pin when it is in a low state. This parameter is important for determining the capability of the component to sink current when driving external loads. It is typically measured in units of amperes (A) and helps in ensuring that the component can effectively drive connected devices without being damaged. Designers use this parameter to ensure proper functioning and reliability of the overall circuit by selecting components with appropriate output low current-max ratings.
0.004A - Height1.25mm
- Length5mm
- Width4mm
- 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 - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 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
ST3485EBDR Pinout

ST3485EBDR CAD Model
Symbol

Footprint

3D Model

ST3485EBDR Alternatives
Part Number | Description | Manufacturer |
ST3485EBD | LINE TRANSCEIVER, PDSO8, SO-8 | STMicroelectronics |
ST3485EBDR Applications
Industrial automation: RS-485 and RS-422 are widely used for connecting sensors, actuators, controllers, and other devices in industrial networks. The ST3485EBDR can provide reliable and fast data transmission in harsh environments, with high immunity to noise and ground potential differences.
Motor control: RS-485 and RS-422 are also used for controlling motors, such as stepper motors, servo motors, and brushless DC motors2. The ST3485EBDR can offer low power consumption, high data rate, and current limiting and thermal shutdown features that protect the driver from overload and excessive power dissipation.
Security systems: RS-485 and RS-422 are suitable for transmitting video signals, audio signals, and control signals in security systems, such as CCTV cameras, intercoms, and access control systems. The ST3485EBDR can ensure high quality and integrity of the signals, with high level of protection against electrostatic discharge (ESD), which can damage electronic components.
ST3485EBDR Manufacturer
STMicroelectronics is a global leader in creating products and solutions for smart mobility, extreme versatility, power and energy, and IoT and connectivity. It is a Franco-Italian company with its operational and executive headquarters located in Plan-les-Ouates, near Geneva, Switzerland. It develops, manufactures and markets semiconductor integrated circuits (ICs) for various applications, such as industrial automation, motor control, security systems, automotive, consumer electronics, communication, computing, healthcare, and more. It has one of the industry’s broadest technology portfolios and its products are found in today’s most innovative electronics solutions. It has a network of manufacturing facilities that provides robust and flexible supply. It is also committed to protecting people and the planet and communicating to its stakeholders with transparency.
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsInterfaceDriver Number of BitsReceiver Number of BitsData RateSupply VoltageMountView Compare
ST3485EBDR
8-SOIC (0.154, 3.90mm Width)
16
RS-422, RS-485
1
1
15Mbps
3.3 V
Surface Mount
8-SOIC (0.154, 3.90mm Width)
8
RS-485
1
1
200kbps
5 V
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8-SOIC (0.154, 3.90mm Width)
8
RS-485
1
1
200kbps
5 V
Surface Mount
8-SOIC (0.154, 3.90mm Width)
8
RS-422, RS-485
-
-
250kbps
-
Surface Mount
SOIC
8
RS-422, RS-485
1
1
5 Mbps
5 V
Surface Mount
Datasheet PDF
- Datasheets :
ST3485EBDR-STMicroelectronics-datasheet-10030485.pdf
ST3485EBDR-STMicroelectronics-datasheet-62334861.pdf
ST3485EBDR-STMicroelectronics-datasheet-83134231.pdf
ST3485EBDR-STMicroelectronics-datasheet-659115.pdf
ST3485EBDR-STMicroelectronics-datasheet-14122897.pdf
ST3485EBDR-STMicroelectronics-datasheet-44642075.pdf
pid_6183145_st3485ebdr-stmicroelectronics-datasheet-83134231.pdf
What is the STMicroelectronics ST3485EBDR device?
The STMicroelectronics ST3485EBDR is a device that can be used for RS-485 and RS-422 communication protocols. It is a transceiver, which means it can both transmit and receive data. It has a high level of protection against electrostatic discharge (ESD), which can damage electronic components. It can operate with a low power supply of 3.3 V and achieve a fast data rate of up to 12 Mbps. It is available in a small SO8 package and has an automotive grade option.
How to use the STMicroelectronics ST3485EBDR device?
The STMicroelectronics ST3485EBDR device is easy to use and has an industry standard 75176 pinout. The device has four pins for data transmission and reception: driver output (A and B) and receiver input (Y and Z). The device also has two pins for power supply: VCC and GND. The device has a low current shutdown mode that can be activated by pulling the RE (receiver enable) and DE (driver enable) pins low. The device can be configured for half duplex operation by connecting the RE and DE pins together and using them as a direction control input. The device can be connected to other devices on the bus by using twisted pair cables and termination resistors. The device can tolerate up to 64 transceivers on the bus. For more details, please refer to the datasheet3 or the web search results.
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