DS485TM

Product Overview

Category: Integrated Circuit (IC)

Use: DS485TM is a high-speed differential bus transceiver designed for bidirectional data communication over long distances. It is commonly used in industrial automation, building automation, and other applications that require reliable and noise-immune data transmission.

Characteristics: - High-speed data transmission - Differential signaling for noise immunity - Low power consumption - Wide operating voltage range - Robust ESD protection

Package: DS485TM is available in a compact 8-pin SOIC package, which ensures easy integration into various electronic systems.

Essence: The essence of DS485TM lies in its ability to provide a reliable and efficient means of transmitting data over long distances while minimizing the impact of noise and interference.

Packaging/Quantity: DS485TM is typically sold in reels containing 250 units per reel.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Data Rate: Up to 10 Mbps
• Operating Temperature Range: -40°C to +85°C
• Input Hysteresis: 50 mV
• Output Current: ±60 mA
• ESD Protection: ±15 kV (Human Body Model)

Detailed Pin Configuration

1. DE (Driver Enable)
2. A (Non-Inverting Data Line)
3. B (Inverting Data Line)
4. GND (Ground)
5. VCC (Supply Voltage)
6. Y (Receiver Output)
7. Z (Receiver Output)
8. RE (Receiver Enable)

Functional Features

• Bidirectional data transmission
• Driver enable control for bus arbitration
• Receiver enable control for low-power standby mode
• Built-in fail-safe biasing resistors for open-circuit conditions
• Thermal shutdown protection

Advantages and Disadvantages

Advantages: - High-speed data transmission capability - Excellent noise immunity due to differential signaling - Low power consumption for energy-efficient operation - Wide operating voltage range for compatibility with various systems - Robust ESD protection for enhanced reliability

Disadvantages: - Limited maximum data rate compared to some other high-speed transceivers - Requires careful consideration of termination and bus topology for optimal performance

Working Principles

DS485TM utilizes differential signaling, where data is transmitted as the voltage difference between two lines (A and B). This method allows the receiver to distinguish between valid data and common-mode noise. The driver and receiver sections are controlled by DE and RE pins, respectively, enabling bidirectional communication.

Detailed Application Field Plans

DS485TM finds extensive use in various industrial automation applications, such as: - Supervisory Control and Data Acquisition (SCADA) systems - Programmable Logic Controllers (PLCs) - Remote Terminal Units (RTUs) - Motor control systems - Building automation systems

Its robustness against noise and long-distance transmission capabilities make it suitable for environments with electromagnetic interference and where reliable communication over extended distances is required.

Detailed and Complete Alternative Models

1. SN75176 - A similar differential bus transceiver with comparable specifications and features.
2. MAX485 - Another popular choice for differential bus communication, offering similar functionality and performance.
3. LTC2850 - A high-speed differential transceiver with advanced features like hot-swappable capability and low quiescent current.

These alternative models can be considered based on specific application requirements and system compatibility.

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