Overview
The SN65HVD72DR is a 3.3-V half-duplex RS-485 line transceiver designed by Texas Instruments for bidirectional data communication on multipoint bus transmission lines. This component is housed in a compact 8-pin SOIC package and is tailored for robust communication in harsh industrial environments. It supports communication speeds up to 250 kbps and operates across a temperature range from -40°C to 125°C, making it suitable for a wide range of applications requiring reliable data transfer.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Number of Receivers | 1 | Number of Transmitters | 1 |
| Duplex | Half | Supply Voltage (nom) | 3.3 V |
| Signaling Rate (max) | 250 kbps | IEC 61000-4-2 Contact | ±12 kV |
| Fault Protection | -13 to 16.5 V | Common-Mode Range | -7 to 12 V |
| Number of Nodes | 200 | Supply Current (max) | 950 µA |
| Operating Temperature Range | -40°C to 125°C | Package Type | SOIC-8 |
Key Features
- Small-size VSSOP Packages and SOIC for Drop-in Compatibility: Saves board space and offers compatibility with existing designs.
- Bus I/O Protection: Provides robust protection against electrostatic discharge (ESD) with >±15 kV HBM and >±12 kV IEC 61000-4-2 contact discharge.
- Extended Industrial Temperature Range: Operates from -40°C to 125°C, making it suitable for harsh industrial environments.
- Large Receiver Hysteresis (80 mV): Enhances noise rejection and improves signal integrity.
- Low Power Consumption: Low standby supply current (< 2 µA) and quiescent current (IC < 1 mA) during operation.
- 5-V Tolerant Logic Inputs: Compatible with 3.3-V or 5-V controllers.
- Glitch Free Power-Up and Power-Down Bus Inputs and Outputs: Ensures smooth operation during power transitions.
- High-Speed Data Transfer: Supports signaling rates up to 250 kbps.
Applications
- Industrial Automation: Ideal for reliable communication between sensors, actuators, and control units across large distances in systems such as data acquisition, programmable logic controllers (PLCs), and industrial Ethernet interfaces.
- Telecommunications: Suitable for networking equipment, base stations, and repeaters where maintaining signal integrity is crucial.
- Building Automation: Used in systems like access controls, HVAC, and fire alarm systems to facilitate communication between control panels and sensors/actuators.
- Robust Data Transmission and Long Distance Communication: Enables fast and reliable data transfer over long distances, making it a standout choice for various industrial and communication applications.
Q & A
- What is the primary function of the SN65HVD72DR?
The SN65HVD72DR is a 3.3-V half-duplex RS-485 line transceiver designed for bidirectional data communication on multipoint bus transmission lines.
- What are the operating temperature ranges for the SN65HVD72DR?
The device operates from -40°C to 125°C.
- What is the maximum signaling rate supported by the SN65HVD72DR?
The SN65HVD72DR supports signaling rates up to 250 kbps.
- What type of ESD protection does the SN65HVD72DR offer?
The device offers >±15 kV HBM and >±12 kV IEC 61000-4-2 contact discharge protection.
- How many nodes can be connected using the SN65HVD72DR?
The device allows over 200 connected nodes.
- What is the typical power consumption of the SN65HVD72DR?
The device has a low quiescent current (IC < 1 mA) and low standby supply current (< 2 µA).
- Is the SN65HVD72DR compatible with 5-V logic inputs?
Yes, the device is 5-V tolerant and compatible with 3.3-V or 5-V controllers.
- What types of applications can benefit from using the SN65HVD72DR?
The device is suitable for industrial automation, telecommunications, building automation, and other applications requiring reliable long-distance communication.
- What is the package type of the SN65HVD72DR?
The device is available in an 8-pin SOIC package.
- Does the SN65HVD72DR have built-in thermal shutdown protection?
Yes, the device features thermal shutdown protection that disables the driver outputs when the junction temperature reaches 170°C.
