MAX488EESA+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-485/RS-422 Transceiver
• Characteristics: Low-power, Half-duplex, 250kbps data rate
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Maxim Integrated's MAX488EESA+T is a low-power, half-duplex transceiver designed for RS-485 and RS-422 communication protocols.
• Packaging/Quantity: The MAX488EESA+T is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

The MAX488EESA+T has the following specifications:

• Supply Voltage Range: +3.0V to +5.5V
• Data Rate: Up to 250kbps
• Operating Temperature Range: -40°C to +85°C
• Number of Channels: 1
• Receiver Input Voltage Range: ±12V
• Driver Output Voltage Range: ±12V
• Quiescent Current: 300µA (typical)

Pin Configuration

The MAX488EESA+T features an 8-pin SOIC package with the following pin configuration:

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

Functional Features

The MAX488EESA+T offers the following functional features:

• Half-Duplex Communication: Supports bidirectional data transmission on a single pair of wires.
• Enhanced ESD Protection: Provides ±15kV Human Body Model (HBM) ESD protection on the bus pins.
• Low-Power Operation: Consumes only 300µA of quiescent current, making it suitable for battery-powered applications.
• Thermal Shutdown Protection: Includes thermal shutdown circuitry to prevent damage due to excessive heat.

Advantages and Disadvantages

Advantages of the MAX488EESA+T include:

• Wide Supply Voltage Range: Can operate with a supply voltage between +3.0V and +5.5V, providing flexibility in various applications.
• High Data Rate: Supports data rates up to 250kbps, enabling fast and efficient communication.
• Enhanced ESD Protection: Protects against electrostatic discharge, ensuring robustness in harsh environments.

Disadvantages of the MAX488EESA+T include:

• Single Channel: Limited to a single channel, which may not be suitable for applications requiring multiple independent channels.
• Half-Duplex Only: Supports half-duplex communication, restricting simultaneous transmission and reception.

Working Principles

The MAX488EESA+T operates based on the RS-485 and RS-422 communication standards. It uses differential signaling to transmit and receive data over long distances. The driver section converts logic-level signals into balanced differential voltages, while the receiver section converts the received differential signals back into logic-level signals.

Detailed Application Field Plans

The MAX488EESA+T is commonly used in various applications, including:

1. Industrial Automation: Enables reliable communication between industrial control systems, sensors, and actuators.
2. Building Automation: Facilitates communication between different building automation devices, such as HVAC systems, lighting controls, and access control systems.
3. Instrumentation: Provides a robust interface for data acquisition systems, test equipment, and measurement devices.
4. Automotive Electronics: Supports communication in automotive applications, such as vehicle diagnostics, infotainment systems, and body control modules.

Detailed and Complete Alternative Models

Some alternative models to the MAX488EESA+T include:

1. SN65HVD485E: Texas Instruments' RS-485 Transceiver with similar specifications and features.
2. LTC1480: Linear Technology's RS-485 Transceiver offering enhanced ESD protection and low power consumption.
3. ADM485: Analog Devices' RS-485 Transceiver with wide supply voltage range and high data rate capability.

These alternative models provide similar functionality and can be considered as substitutes for the MAX488EESA+T in various applications.

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