MAX487EESA-T

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-485/RS-422 Transceiver
• Characteristics: Low-power, Half-duplex, 2.5V to 5.5V Supply Voltage Range
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: MAX487EESA-T is a high-speed transceiver designed for RS-485 and RS-422 communication protocols.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 5.5V
• Data Rate: Up to 2.5Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Drivers/Receivers: 1 Driver, 1 Receiver
• Receiver Input Impedance: 12kΩ
• Driver Output Impedance: 60Ω
• Shutdown Current: 1μA (max)

Pin Configuration

The MAX487EESA-T has the following pin configuration:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| RO RE |-- Pin 2: Receiver Output (RO) --| DI DE |-- Pin 3: Driver Input (DI) --| DE /RE |-- Pin 4: Driver Enable (DE) / Receiver Enable (/RE) --| Y A |-- Pin 5: Driver Output (Y) / Receiver Input (A) --| B Z |-- Pin 6: Receiver Input (B) / Driver Output (Z) --| A /B |-- Pin 7: Driver Input (A) / Receiver Input (/B) --| BIAS VCC |-- Pin 8: Supply Voltage (VCC) |___________| ```

Functional Features

• Supports RS-485 and RS-422 communication protocols.
• Half-duplex operation allows transmission and reception on a single pair of wires.
• Wide supply voltage range enables compatibility with various systems.
• Low-power design for energy-efficient applications.
• Built-in driver and receiver enable/disable functionality.

Advantages and Disadvantages

Advantages: - High-speed data transmission up to 2.5Mbps. - Robust performance in noisy environments due to differential signaling. - Flexible supply voltage range allows integration into different systems. - Low power consumption extends battery life in portable devices.

Disadvantages: - Limited to half-duplex communication, not suitable for full-duplex applications. - Requires external components for proper termination and biasing.

Working Principles

The MAX487EESA-T is a transceiver IC designed for RS-485 and RS-422 communication. It utilizes differential signaling to transmit and receive data over long distances while maintaining noise immunity. The driver section converts the logic-level input signal into a balanced differential output, while the receiver section converts the received differential signal back into a logic-level output.

The transceiver operates in half-duplex mode, allowing bidirectional communication on a single pair of wires. The driver and receiver can be enabled or disabled independently using the DE (Driver Enable) and /RE (Receiver Enable) pins. This feature enables multi-point communication by controlling the direction of data flow.

Detailed Application Field Plans

The MAX487EESA-T is widely used in various industrial and communication applications, including:

1. Industrial Automation: Used for reliable data transmission in factory automation systems, process control, and industrial monitoring.
2. Building Automation: Enables communication between different building systems, such as HVAC (Heating, Ventilation, and Air Conditioning), lighting control, and security systems.
3. Instrumentation: Suitable for data acquisition systems, test equipment, and measurement devices that require long-distance communication.
4. Networking: Used in network switches, routers, and hubs to extend the reach of data transmission over twisted-pair cables.
5. Automotive: Enables communication between different automotive modules, such as engine control units, body control modules, and infotainment systems.

Detailed and Complete Alternative Models

1. MAX485EESA+: Similar to MAX487EESA-T but with a higher data rate of up to 10Mbps.
2. SN75176BDR: RS-485/RS-422 transceiver with a wide supply voltage range and low power consumption.
3. LTC2850IMS#PBF: Low-power RS-485 transceiver with integrated ESD protection and high data rate capability.

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

Word count: 529 words