MAX487ECPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-485/RS-422 Transceiver
• Characteristics: Low-power, half-duplex communication, high-speed data transmission
• Package: 8-pin PDIP (Plastic Dual In-line Package)
• Essence: MAX487ECPA is a versatile IC that enables reliable and efficient communication over long distances using the RS-485/RS-422 protocol.
• Packaging/Quantity: Available in tubes or reels, with a quantity of 25 units per tube/reel.

Specifications

• Supply Voltage Range: +4.75V to +5.25V
• Data Rate: Up to 2.5Mbps
• Operating Temperature Range: -40°C to +85°C
• ESD Protection: ±15kV Human Body Model
• Receiver Input Impedance: 12kΩ
• Driver Output Impedance: 60Ω

Pin Configuration

The MAX487ECPA features an 8-pin PDIP package with the following pin configuration:

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

Functional Features

• Half-Duplex Communication: The MAX487ECPA allows bidirectional communication on a single pair of wires, enabling both transmitting and receiving data.
• High-Speed Data Transmission: With a maximum data rate of 2.5Mbps, it supports fast and efficient communication.
• Low-Power Operation: The IC operates at low power, making it suitable for battery-powered applications.
• ESD Protection: The MAX487ECPA provides robust protection against electrostatic discharge, ensuring reliable operation in harsh environments.

Advantages and Disadvantages

Advantages: - Versatile: Supports both RS-485 and RS-422 protocols. - Wide Operating Temperature Range: Can operate in extreme temperature conditions. - Low Power Consumption: Ideal for energy-efficient applications. - Robust ESD Protection: Ensures reliability in challenging environments.

Disadvantages: - Limited Data Rate: Although suitable for most applications, it may not be suitable for high-speed data transmission requirements exceeding 2.5Mbps.

Working Principles

The MAX487ECPA is designed to facilitate long-distance communication using the RS-485/RS-422 protocol. It employs differential signaling, where data is transmitted as voltage differences between two wires. This allows for noise immunity and enables reliable communication over long distances.

The driver section of the IC converts logic-level signals into differential voltages, while the receiver section converts the received differential voltages back into logic-level signals. The DE (Driver Enable) and /RE (Receiver Enable) pins control the direction of data flow, enabling half-duplex communication.

Detailed Application Field Plans

The MAX487ECPA finds applications in various fields, including:

1. Industrial Automation: Used for communication between PLCs (Programmable Logic Controllers), sensors, and actuators in industrial automation systems.
2. Building Automation: Enables communication between different building management systems, such as HVAC (Heating, Ventilation, and Air Conditioning) controllers, lighting control systems, and access control systems.
3. Instrumentation: Facilitates communication between measurement devices, such as data loggers, sensors, and control units.
4. Automotive Electronics: Used in automotive applications for communication between different electronic modules, such as engine control units, body control modules, and infotainment systems.

Detailed and Complete Alternative Models

1. MAX485ECPA: Similar to MAX487ECPA, but with a lower data rate of 2.5Mbps.
2. SN75176BP: RS-485/RS-422 transceiver with a data rate of up to 10Mbps.
3. LTC2850IMS#PBF: Low-power RS-485 transceiver with a data rate of up to 20Mbps.
4. ADM485ARZ: RS-485 transceiver with a data rate of up to 250kbps.

These alternative models offer different features and specifications, allowing users to choose the most suitable option based on their specific requirements.

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