MAX487CPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Transceiver
• Characteristics: Low-power, RS-485/RS-422 transceiver
• Package: 8-pin PDIP (Plastic Dual In-line Package)
• Essence: MAX487CPA is a versatile transceiver IC designed for bidirectional communication over long distances using the RS-485/RS-422 standard.
• 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
• Number of Drivers and Receivers: 1 driver, 1 receiver
• Receiver Input Impedance: 12kΩ
• Driver Output Impedance: 60Ω
• Maximum Driver Output Current: ±60mA
• ESD Protection: ±15kV (Human Body Model)

Pin Configuration

The MAX487CPA has an 8-pin PDIP package with the following pin configuration:

___________ | | 1 | A | 8 Vcc 2 | B | 7 GND 3 | Y | 6 RO 4 | Z | 5 RE/DE |___________|

Functional Features

• Low power consumption: The MAX487CPA operates at low supply voltages and consumes minimal power, making it suitable for battery-powered applications.
• High data rate: With a maximum data rate of 2.5Mbps, this transceiver can handle high-speed communication requirements.
• Robust communication: The RS-485/RS-422 standard provides noise immunity and allows for reliable communication over long distances.
• Half-duplex operation: The MAX487CPA supports half-duplex communication, allowing data transmission in both directions but not simultaneously.

Advantages and Disadvantages

Advantages: - Low power consumption - High data rate - Robust communication over long distances - Easy to use and integrate into existing systems

Disadvantages: - Limited to half-duplex operation - Requires external components for complete functionality

Working Principles

The MAX487CPA is designed to facilitate bidirectional communication using the RS-485/RS-422 standard. It features a driver and a receiver, enabling data transmission in both directions. The driver converts the logic-level signals into differential voltages suitable for long-distance transmission, while the receiver converts the received differential signals back into logic-level signals.

Detailed Application Field Plans

The MAX487CPA is widely used in various applications, including:

1. Industrial Automation: Used for communication between PLCs (Programmable Logic Controllers), sensors, and actuators in industrial control systems.
2. Building Automation: Enables communication between different building automation devices, such as HVAC (Heating, Ventilation, and Air Conditioning) systems, lighting controls, and access control systems.
3. Instrumentation: Facilitates data exchange between measurement instruments, such as data loggers, temperature sensors, and pressure transducers.
4. Automotive Systems: 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

Some alternative models to the MAX487CPA include:

1. SN75176: Similar low-power RS-485 transceiver with a wide supply voltage range.
2. LTC2850: RS-485 transceiver with integrated ESD protection and high data rate capability.
3. ADM485: Low-power RS-485 transceiver with a wide operating temperature range.

These alternative models offer similar functionality and can be considered as replacements for the MAX487CPA in various applications.

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