MAX487CSA

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-485/RS-422 Transceiver
• Characteristics: Low-power, Half-duplex, Multipoint Transceiver
• Package: 8-pin Small Outline Integrated Circuit (SOIC)
• Essence: MAXIM Integrated Products' MAX487CSA is a low-power transceiver designed for RS-485 and RS-422 communication protocols.
• Packaging/Quantity: The MAX487CSA is available in a small outline integrated circuit package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 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 Sensitivity: ±200mV
• Driver Output Voltage Swing: ±1.5V
• Quiescent Current: 300µA (typical)

Pin Configuration

The MAX487CSA has the following pin configuration:

```

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| | --| Vcc GND |-- Pin 1: Power Supply --| RO DI |-- Pin 2: Receiver Output / Driver Input --| RE DE |-- Pin 3: Receiver Enable / Driver Enable --| A B |-- Pins 4 and 5: Differential Data Inputs/Outputs --| B A | --| DE RE |-- Pin 6: Driver Enable / Receiver Enable --| DI RO |-- Pin 7: Driver Input / Receiver Output --| GND Vcc |-- Pin 8: Ground |___________| ```

Functional Features

• Low-power design for energy-efficient operation.
• Half-duplex communication allows transmission and reception on a single pair of wires.
• Multipoint transceiver enables communication between multiple devices on the same bus.
• Wide supply voltage range ensures compatibility with various systems.
• High data rate capability of up to 2.5Mbps facilitates fast and reliable communication.

Advantages and Disadvantages

Advantages: - Low power consumption extends battery life in portable applications. - Half-duplex operation simplifies wiring and reduces cost. - Multipoint capability enables flexible network topologies. - Wide supply voltage range enhances compatibility. - High data rate supports fast and efficient communication.

Disadvantages: - Limited to half-duplex communication, which may not be suitable for certain applications requiring simultaneous bidirectional data transfer. - Requires external components for proper operation, increasing system complexity.

Working Principles

The MAX487CSA is designed to facilitate communication using the RS-485 and RS-422 protocols. It operates in a half-duplex mode, allowing transmission and reception on a single pair of wires. The driver section converts logic-level signals into differential voltages for transmission, while the receiver section converts received differential signals back into logic-level signals.

The driver and receiver sections are controlled by enable signals (DE and RE) to switch between transmit and receive modes. This enables the device to operate as a multipoint transceiver, allowing multiple devices to communicate on the same bus.

Detailed Application Field Plans

The MAX487CSA is widely used in various applications that require robust and reliable long-distance communication. Some common application fields include:

1. Industrial Automation: Used for communication between PLCs, sensors, and actuators in industrial control systems.
2. Building Automation: Enables communication between different building automation devices, such as HVAC systems, lighting controls, and access control systems.
3. Instrumentation: Facilitates data transmission between measurement instruments and control systems in laboratory and industrial settings.
4. Automotive Electronics: Used for communication between different automotive modules, such as engine control units, body control modules, and infotainment systems.
5. Renewable Energy Systems: Enables communication between various components of renewable energy systems, such as solar inverters and battery management systems.

Detailed and Complete Alternative Models

• MAX485ESA
• MAX3485ESA
• SN75176BP
• LTC485CN8
• ADM485ARZ

These alternative models offer similar functionality to the MAX487CSA and can be considered as replacements based on specific application requirements.

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