SP491CN-L/TR

Product Overview

• Category: Integrated Circuit
• Use: Communication and Data Transmission
• Characteristics: High-speed, Low-power, RS-485 Transceiver
• Package: SOP-8 (Small Outline Package)
• Essence: Reliable and Efficient Communication Interface
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Supply Voltage: 3.0V to 5.5V
• Data Rate: Up to 20 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Pins: 8
• Input/Output Impedance: 12 kΩ
• Receiver Input Sensitivity: ±200 mV
• Driver Output Current: ±60 mA
• Shutdown Current: 1 µA (max)

Detailed Pin Configuration

The SP491CN-L/TR has the following pin configuration:

| Pin No. | Name | Description | |---------|------|-------------| | 1 | RO | Receiver Output | | 2 | RE | Receiver Enable | | 3 | DE | Driver Enable | | 4 | DI | Driver Input | | 5 | GND | Ground | | 6 | VCC | Supply Voltage | | 7 | B | Inverting Driver Output | | 8 | A | Non-Inverting Driver Output |

Functional Features

• Full-duplex communication capability
• Enhanced ESD protection for robustness
• Low quiescent current for power efficiency
• Wide supply voltage range for flexibility
• Built-in thermal shutdown protection
• Short-circuit and fail-safe receiver inputs

Advantages

• High-speed data transmission up to 20 Mbps
• Low-power consumption for energy efficiency
• Reliable communication in noisy environments
• Easy integration with various microcontrollers
• Compact SOP-8 package for space-saving designs

Disadvantages

• Limited number of pins for additional functionalities
• Requires external components for complete functionality
• Not suitable for long-distance communication

Working Principles

The SP491CN-L/TR is a high-speed RS-485 transceiver that enables bidirectional communication between two or more devices over a twisted pair cable. It utilizes differential signaling to achieve noise immunity and can operate in harsh industrial environments.

The transceiver consists of a receiver and a driver. The receiver converts the differential input signals into logic levels, while the driver converts logic levels into differential output signals. The enable pins (RE and DE) control the direction of data flow.

Detailed Application Field Plans

The SP491CN-L/TR is widely used in various applications, including:

1. Industrial Automation: Enables reliable communication between PLCs, sensors, and actuators in factory automation systems.
2. Building Automation: Facilitates data exchange between HVAC systems, lighting controls, and access control systems.
3. Automotive Electronics: Supports communication between different electronic modules in vehicles, such as engine control units and infotainment systems.
4. Security Systems: Provides a robust interface for connecting security cameras, alarm systems, and access control panels.
5. Renewable Energy: Enables communication between solar inverters, battery management systems, and monitoring devices.

Detailed and Complete Alternative Models

1. MAX485 - Similar RS-485 transceiver with wide supply voltage range and low power consumption.
2. SN75176 - RS-485 transceiver with fail-safe receiver inputs and thermal shutdown protection.
3. LTC2862 - High-speed RS-485 transceiver with integrated ESD protection and low quiescent current.

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