MAX491MJD

Product Overview

• Category: Integrated Circuit
• Use: RS-485/RS-422 Transceiver
• Characteristics: Low-power, slew-rate-limited transceiver for RS-485 and RS-422 communication
• Package: 14-pin SOIC package
• Essence: Provides a robust interface between microcontrollers and industrial buses
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 4.75V to 5.25V
• Operating Temperature Range: -40°C to 85°C
• Data Rate: Up to 2.5Mbps
• Driver Output: ±10V
• Receiver Input: ±12V
• Quiescent Current: 300µA (typical)

Detailed Pin Configuration

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

Functional Features

• Slew-Rate Limited Driver for Reduced EMI
• Thermal Shutdown Protection
• Short-Circuit Protection
• Full-Duplex Communication

Advantages

• Low Power Consumption
• Robust Communication in Noisy Environments
• Wide Operating Temperature Range
• Built-in Protection Features

Disadvantages

• Limited Data Rate Compared to Some High-Speed Transceivers
• Requires External Pull-Up and Pull-Down Resistors for Proper Operation

Working Principles

The MAX491MJD is designed to facilitate reliable communication over long cable runs in industrial environments. It features a slew-rate-limited driver to minimize electromagnetic interference (EMI) and provides thermal shutdown and short-circuit protection to ensure robust operation.

Detailed Application Field Plans

The MAX491MJD is commonly used in industrial automation, process control, and building automation systems where RS-485 or RS-422 communication is required. It can be integrated into various devices such as PLCs, motor drives, and sensor interfaces to enable seamless data exchange over long distances.

Detailed and Complete Alternative Models

• MAX487EESA
• SN65HVD3085EDR
• LTC2857IGN
• ADM2483BRWZ

This concludes the detailed entry for the MAX491MJD, covering its product overview, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.