SN65HVD485EDGKR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Transceiver
• Characteristics: High-speed, half-duplex, RS-485/RS-422 transceiver
• Package: VSSOP (Very Small Outline Package)
• Essence: Provides robust communication over long distances in noisy environments
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 3V to 5.5V
• Data Rate: Up to 20 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Pins: 8
• ESD Protection: ±15 kV HBM (Human Body Model)
• Receiver Input Impedance: 12 kΩ
• Driver Output Impedance: 35 Ω

Detailed Pin Configuration

1. A (Driver Output A)
2. B (Driver Output B)
3. GND (Ground)
4. RE (Receiver Enable)
5. DE (Driver Enable)
6. VCC (Supply Voltage)
7. B (Receiver Input B)
8. A (Receiver Input A)

Functional Features

• Half-Duplex Communication: Allows transmission and reception on a single pair of wires
• Robust Communication: Supports long-distance communication up to several kilometers
• Noise Immunity: Provides excellent noise rejection capabilities for reliable data transmission
• Low Power Consumption: Optimized power management for energy-efficient operation
• Fail-Safe Receiver: Ensures a high-level output when the bus is idle or disconnected

Advantages

• Wide Supply Voltage Range: Can operate with various power sources
• High Data Rate: Enables fast and efficient data transfer
• Compact Package: VSSOP package allows for space-saving integration
• ESD Protection: Protects against electrostatic discharge for enhanced reliability
• Flexible Enable Control: Allows for easy interfacing with microcontrollers or other devices

Disadvantages

• Half-Duplex Limitation: Cannot transmit and receive simultaneously
• Limited Pin Count: May require additional components for complex applications
• Temperature Range: Operating temperature limited to -40°C to +85°C

Working Principles

The SN65HVD485EDGKR is a half-duplex transceiver designed for RS-485/RS-422 communication. It uses differential signaling to transmit and receive data over long distances. The driver section converts logic-level signals into balanced differential voltages, while the receiver section converts the received differential signals back into logic-level signals.

When transmitting, the driver is enabled (DE = High) and the receiver is disabled (RE = Low). Conversely, when receiving, the driver is disabled and the receiver is enabled. This half-duplex operation allows bidirectional communication on a single pair of wires.

The transceiver incorporates various protection features, such as ESD protection and fail-safe biasing, to ensure reliable operation in harsh environments.

Detailed Application Field Plans

The SN65HVD485EDGKR is widely used in industrial automation, building automation, and automotive applications. Some specific application areas include:

1. Industrial Control Systems: Used for communication between PLCs (Programmable Logic Controllers), sensors, and actuators in factory automation systems.
2. Building Management Systems: Enables communication between HVAC (Heating, Ventilation, and Air Conditioning) systems, lighting controls, and access control systems.
3. Automotive Networks: Facilitates communication between various electronic modules in vehicles, such as engine control units, body control modules, and infotainment systems.

Detailed and Complete Alternative Models

1. MAX485: Similar RS-485/RS-422 transceiver with comparable specifications and pin configuration.
2. LTC485: Another RS-485 transceiver with extended temperature range and additional features.
3. SN75176: Half-duplex RS-485 transceiver with a different pin configuration but similar functionality.

(Note: This list is not exhaustive and other alternative models may exist.)

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