SN65HVD78D

Product Overview

Category

SN65HVD78D belongs to the category of integrated circuits (ICs) specifically designed for use in industrial applications.

Use

This IC is commonly used for communication purposes in industrial automation systems, such as fieldbus networks and industrial control systems.

Characteristics

• Robustness: SN65HVD78D is designed to withstand harsh industrial environments, including high temperatures, voltage transients, and electromagnetic interference.
• High-speed communication: It supports data rates up to 5 Mbps, enabling fast and reliable communication between devices.
• Low power consumption: The IC is optimized for low power operation, making it suitable for battery-powered applications.
• ESD protection: It provides built-in electrostatic discharge (ESD) protection, ensuring the reliability of the communication link.

Package

SN65HVD78D is available in a small outline integrated circuit (SOIC) package. The package dimensions are 3.91 mm x 8.65 mm.

Essence

The essence of SN65HVD78D lies in its ability to facilitate robust and high-speed communication in industrial settings, ensuring reliable data transmission between devices.

Packaging/Quantity

SN65HVD78D is typically sold in reels containing 250 units per reel.

Specifications

• Supply voltage range: 3.3V to 5V
• Data rate: Up to 5 Mbps
• Operating temperature range: -40°C to +125°C
• Number of pins: 8
• Pin pitch: 1.27 mm

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. TXD: Transmit data output
4. RXD: Receive data input
5. RS: Receiver input/output enable
6. DE: Driver output enable
7. RE: Receiver output enable
8. VREF: Reference voltage output

Functional Features

• Half-duplex communication: SN65HVD78D supports half-duplex communication, allowing devices to transmit and receive data on a shared communication line.
• Bus fault protection: It provides bus fault protection, detecting and reporting faults such as short circuits and open circuits on the communication line.
• Wake-up functionality: The IC supports wake-up functionality, enabling devices to be activated from a low-power sleep mode upon receiving specific wake-up signals.

Advantages and Disadvantages

Advantages

• Robustness in harsh industrial environments
• High-speed communication capability
• Low power consumption
• Built-in ESD protection

Disadvantages

• Limited to half-duplex communication
• Relatively small number of pins for complex applications

Working Principles

SN65HVD78D operates based on the principles of differential signaling. It uses a balanced transmission line to transmit data, which helps in reducing noise and improving signal integrity. The IC employs various techniques, such as voltage level shifting and filtering, to ensure reliable data transmission over long distances.

Detailed Application Field Plans

SN65HVD78D finds extensive application in various industrial automation systems, including: 1. Fieldbus networks: It is commonly used in protocols like Profibus, DeviceNet, and CAN (Controller Area Network). 2. Industrial control systems: The IC facilitates communication between different components of industrial control systems, such as programmable logic controllers (PLCs) and sensors.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to SN65HVD78D are: - MAX1487E - LTC2874 - ADM3053

These alternatives can be considered based on specific requirements and compatibility with the target system.

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