MAX487ESA+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: RS-485/RS-422 Transceiver
• Characteristics: Low-power, half-duplex transceiver
• Package: 8-SOIC (Small Outline Integrated Circuit)
• Essence: MAXIM Integrated Products' MAX487ESA+T is a low-power, half-duplex transceiver designed for RS-485 and RS-422 communication protocols.
• Packaging/Quantity: The MAX487ESA+T is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: +4.75V to +5.25V
• Data Rate: Up to 2.5Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Drivers/Receivers: 1/1
• Receiver Input Impedance: 12kΩ
• Driver Output Impedance: 60Ω
• ESD Protection: ±15kV (Human Body Model)

Pin Configuration

The MAX487ESA+T has an 8-pin SOIC 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

• Low-power shutdown mode for power-saving applications
• Half-duplex operation for bidirectional communication
• High-speed data transmission up to 2.5Mbps
• Robust ESD protection for reliable operation in harsh environments
• Wide operating temperature range for versatile applications

Advantages and Disadvantages

Advantages: - Low-power consumption - High data rate capability - ESD protection for enhanced reliability - Compact package size

Disadvantages: - Limited to half-duplex communication - Requires external control signals for driver/receiver enable

Working Principles

The MAX487ESA+T is a half-duplex transceiver that enables bidirectional communication using the RS-485 and RS-422 protocols. It features a single driver and receiver, allowing data transmission in both directions but not simultaneously. The DE (Driver Enable) and RE (Receiver Enable) pins control the direction of data flow.

When DE is high and RE is low, the driver is enabled, allowing data transmission from the A and B inputs to the bus. When DE is low and RE is high, the receiver is enabled, allowing data reception from the bus to the A and B outputs.

Detailed Application Field Plans

The MAX487ESA+T is widely used in various applications requiring long-distance, noise-immune communication. Some common application fields include:

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 data exchange between measurement instruments, data loggers, and control units in scientific and industrial instrumentation.
4. Automotive Electronics: Utilized in automotive networks for communication between ECUs (Electronic Control Units), sensors, and actuators.
5. Renewable Energy Systems: Enables communication between solar inverters, wind turbines, and energy management systems in renewable energy installations.

Detailed and Complete Alternative Models

1. SN75176BP - Texas Instruments
2. LTC485 - Linear Technology
3. ADM485 - Analog Devices
4. SP3485 - Exar Corporation
5. ST485B - STMicroelectronics

These alternative models offer similar functionality to the MAX487ESA+T and can be considered as replacements based on specific application requirements.

Word count: 536 words