MAX14840EATA+T

Product Overview

• Category: Integrated Circuit
• Use: Industrial Communication and Control
• Characteristics: High-Speed, Half-Duplex RS-485/RS-422 Transceiver
• Package: 8-pin Thin Shrink Small Outline (TSSOP)
• Essence: Reliable and Efficient Communication Interface Solution
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 3V to 5.5V
• Data Rate: Up to 25Mbps
• Operating Temperature Range: -40°C to +85°C
• ESD Protection: ±15kV Human Body Model (HBM)
• Receiver Input Impedance: 12kΩ
• Driver Output Impedance: 35Ω
• Maximum Bus Length: 1200m

Pin Configuration

The MAX14840EATA+T features the following pin configuration:

1. DE (Driver Enable)
2. RE (Receiver Enable)
3. RO (Receiver Output)
4. DI (Driver Input)
5. GND (Ground)
6. VCC (Supply Voltage)
7. B (Bus Terminal B)
8. A (Bus Terminal A)

Functional Features

• High-Speed Data Transmission: Supports data rates up to 25Mbps, enabling fast and efficient communication.
• Half-Duplex Operation: Allows bidirectional communication on a single bus line, reducing wiring complexity.
• Enhanced ESD Protection: Provides ±15kV HBM ESD protection, ensuring robustness in harsh industrial environments.
• Low Power Consumption: Optimized power management circuitry minimizes power consumption during operation.
• Fail-Safe Receiver Inputs: Ensures receiver outputs are in a known state when inputs are open or shorted.

Advantages

• Wide Supply Voltage Range: Operates from 3V to 5.5V, providing flexibility in various industrial applications.
• Extended Temperature Range: Can withstand extreme temperatures from -40°C to +85°C, suitable for harsh environments.
• Compact Package: Housed in an 8-pin TSSOP package, saving board space and facilitating integration into compact designs.
• Reliable Communication: Offers robust communication over long distances (up to 1200m) with low error rates.

Disadvantages

• Half-Duplex Limitation: Supports only half-duplex communication, which may not be suitable for applications requiring simultaneous bidirectional data transfer.
• Limited Pin Count: With only 8 pins, the device may have limited functionality compared to higher pin count alternatives.

Working Principles

The MAX14840EATA+T is a high-speed RS-485/RS-422 transceiver that enables reliable communication between industrial control systems. It operates in a half-duplex mode, allowing bidirectional data transmission on a single bus line. The driver and receiver sections are designed to provide efficient signal conversion and noise immunity, ensuring accurate data transfer over long distances.

Detailed Application Field Plans

The MAX14840EATA+T finds extensive use in various industrial applications, including:

1. Factory Automation: Enables communication between PLCs, sensors, and actuators in automated manufacturing processes.
2. Building Management Systems: Facilitates data exchange between HVAC systems, lighting controls, and security devices.
3. Energy Management: Supports communication between smart meters, inverters, and energy monitoring systems.
4. Transportation Systems: Provides reliable communication in railway signaling, traffic management, and vehicle control systems.
5. Process Control: Enables seamless data transfer between control systems and field devices in oil refineries, chemical plants, etc.

Detailed and Complete Alternative Models

1. SN65HVD485E: High-Speed RS-485 Transceiver with Enhanced ESD Protection
2. LTC2862: Low Power RS-485 Transceiver with Integrated Cable Termination
3. ADM2485: Isolated RS-485 Transceiver with Integrated Transformer

These alternative models offer similar functionality and can be considered based on specific application requirements.

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