DS485M/NOPB

Product Overview

Category

The DS485M/NOPB belongs to the category of integrated circuits (ICs) and specifically falls under the family of RS-485/RS-422 transceivers.

Use

This product is commonly used for communication in industrial automation, building automation, and other applications requiring robust and reliable data transmission over long distances.

Characteristics

• Robustness: Designed to withstand harsh industrial environments.
• Long-distance Communication: Capable of transmitting data over long cable runs.
• Noise Immunity: Provides high noise immunity, making it suitable for industrial settings.
• Low Power Consumption: Offers low power consumption for energy-efficient operation.

Package

The DS485M/NOPB is typically available in a small outline integrated circuit (SOIC) package, which provides ease of handling and integration into various electronic systems.

Essence

The essence of the DS485M/NOPB lies in its ability to facilitate reliable and efficient data communication in industrial and commercial applications.

Packaging/Quantity

It is commonly supplied in reels containing a specific quantity of units, typically ranging from 250 to 3000 units per reel, depending on the manufacturer's specifications.

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Data Rate: Up to 20Mbps
• Operating Temperature Range: -40°C to 85°C
• Number of Channels: 1
• Interface Type: RS-485/RS-422
• Package Type: SOIC

Detailed Pin Configuration

The DS485M/NOPB features a standard pin configuration with pins designated for power supply, data input/output, and control signals. The detailed pinout is as follows:

| Pin No. | Name | Description | |---------|------------|-------------------------------| | 1 | VCC | Power Supply Voltage | | 2 | A | Non-Inverting Data Line (A) | | 3 | B | Inverting Data Line (B) | | 4 | GND | Ground | | 5 | RO | Receiver Output | | 6 | RE | Receiver Output Enable | | 7 | DE | Driver Output Enable | | 8 | DI | Driver Input |

Functional Features

• Differential Signaling: Utilizes differential signaling for noise immunity and long-distance communication.
• Receiver Output Enable (RO): Allows the receiver output to be enabled or disabled as needed.
• Driver Output Enable (DE): Enables or disables the driver output for controlling the transmission of data.
• Overvoltage Protection: Incorporates overvoltage protection to safeguard against voltage spikes.

Advantages and Disadvantages

Advantages

• Robust communication in industrial environments
• High noise immunity
• Long-distance data transmission capability
• Low power consumption

Disadvantages

• Requires careful attention to signal termination for optimal performance
• May require additional components for certain configurations

Working Principles

The DS485M/NOPB operates based on the principles of differential signaling, where data is transmitted as the difference between two signals. This allows for effective noise rejection and reliable communication over extended distances. The driver and receiver components work together to ensure accurate data transmission and reception.

Detailed Application Field Plans

The DS485M/NOPB finds extensive use in various application fields, including: - Industrial Automation: Used for connecting sensors, actuators, and controllers in industrial automation systems. - Building Automation: Employed in HVAC (Heating, Ventilation, and Air Conditioning) systems, access control, and lighting control applications. - Transportation Systems: Integrated into transportation infrastructure for communication between control units and monitoring devices.

Detailed and Complete Alternative Models

Some alternative models to the DS485M/NOPB include: - MAX485: A widely used RS-485 transceiver with similar characteristics and functionality. - SN65HVD72: Another popular choice for RS-485 communication, offering comparable performance and features.

In conclusion, the DS485M/NOPB serves as a reliable and robust solution for long-distance data communication in industrial and commercial applications, offering high noise immunity and low power consumption. Its compatibility with various systems and availability of alternative models make it a versatile choice for designers and engineers seeking dependable communication solutions.

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