MAX1487C/D

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-485/RS-422 Transceiver
• Characteristics: High-speed, low-power, half-duplex communication
• Package: 14-pin SOIC (Small Outline Integrated Circuit)
• Essence: MAX1487C/D is a versatile transceiver designed for reliable data communication over long distances using the RS-485/RS-422 standard.
• Packaging/Quantity: Available in tubes or tape and reel packaging, with quantities varying based on customer requirements.

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 driver, 1 receiver
• Driver Output Current: ±10mA
• Receiver Input Sensitivity: ±200mV
• Shutdown Mode: Low power consumption when not in use

Pin Configuration

The MAX1487C/D features a 14-pin SOIC package with the following pin configuration:

1. DE (Driver Enable)
2. /RE (Receiver Enable)
3. A (Non-Inverting Driver Output)
4. B (Inverting Driver Output)
5. GND (Ground)
6. B (Inverting Receiver Input)
7. A (Non-Inverting Receiver Input)
8. VCC (Power Supply)
9. RO (Receiver Output)
10. DI (Driver Input)
11. /RE (Receiver Enable)
12. DE (Driver Enable)
13. GND (Ground)
14. VCC (Power Supply)

Functional Features

• Supports RS-485 and RS-422 standards
• Half-duplex communication mode
• Low power consumption in shutdown mode
• Wide operating temperature range for industrial applications
• High data rate capability for fast communication

Advantages and Disadvantages

Advantages

• Versatile transceiver suitable for various applications
• Reliable data communication over long distances
• Low power consumption when not in use
• Robust design for industrial environments
• High-speed data transmission

Disadvantages

• Limited to half-duplex communication only
• Requires external components for complete functionality
• Sensitive to voltage fluctuations

Working Principles

The MAX1487C/D is designed to facilitate reliable data communication over long distances using the RS-485/RS-422 standard. It operates in a half-duplex mode, allowing bidirectional communication on a single pair of wires. The transceiver features a driver and a receiver, enabling data transmission and reception.

When transmitting data, the driver input (DI) receives the digital signal and converts it into a differential output signal on pins A and B. The driver enable (DE) pin controls the driver's operation. On the receiving end, the receiver input pins (A and B) detect the differential signals and convert them into a digital output signal on the receiver output (RO) pin.

The MAX1487C/D ensures reliable communication by providing robust protection against electrical noise, voltage spikes, and other disturbances commonly encountered in industrial environments.

Detailed Application Field Plans

The MAX1487C/D is widely used in various applications that require long-distance, high-speed data communication. Some common application fields include:

1. Industrial Automation: Used in PLCs (Programmable Logic Controllers), SCADA (Supervisory Control and Data Acquisition) systems, and industrial control networks.
2. Building Automation: Enables communication between different building automation devices, such as HVAC (Heating, Ventilation, and Air Conditioning) systems, lighting control systems, and security systems.
3. Instrumentation: Facilitates data transmission in measurement and control instruments, such as data loggers, sensors, and signal converters.
4. Automotive: Used in automotive electronics for communication between different vehicle subsystems, such as engine control units, body control modules, and infotainment systems.

Detailed and Complete Alternative Models

• MAX1487E/D: Similar to MAX1487C/D but with extended temperature range (-40°C to +125°C).
• MAX485: Full-duplex RS-485/RS-422 transceiver with additional features like fail-safe biasing and hot-swappable capability.
• SN75176: RS-485 transceiver with low power consumption and wide supply voltage range.
• LTC2850: High-speed RS-485 transceiver with integrated ESD protection and fault detection features.

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

In conclusion, the MAX1487C/D is a versatile RS-485/RS-422 transceiver designed for reliable long-distance data communication. Its high-speed capability, low power consumption, and robust design make it suitable for various industrial