ST485BDR

Product Overview

Category

ST485BDR belongs to the category of integrated circuits (ICs).

Use

It is commonly used for communication purposes in various electronic devices.

Characteristics

• ST485BDR is a low-power transceiver designed for RS-485 and RS-422 communication.
• It operates over a wide voltage range, making it suitable for different applications.
• The device offers high noise immunity, ensuring reliable data transmission.
• It features a low quiescent current, making it energy-efficient.

Package

ST485BDR is available in a small outline package (SOIC) with 8 pins.

Essence

The essence of ST485BDR lies in its ability to facilitate robust and efficient serial communication.

Packaging/Quantity

ST485BDR is typically sold in reels containing a specified quantity of units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 4.5V to 5.5V
• Data Rate: Up to 20 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Pins: 8
• Package Type: SOIC

Detailed Pin Configuration

1. A - Driver Output A
2. B - Driver Output B
3. GND - Ground
4. DE - Driver Enable
5. /RE - Receiver Enable
6. Y - Receiver Output
7. Z - Receiver Output
8. VCC - Supply Voltage

Functional Features

• ST485BDR supports half-duplex communication, allowing bidirectional data transfer on a single pair of wires.
• It provides thermal shutdown protection, preventing damage due to excessive temperature.
• The device incorporates fail-safe circuitry, ensuring a logical high output when the inputs are open or shorted.

Advantages and Disadvantages

Advantages

• Wide operating voltage range enables compatibility with various systems.
• High noise immunity ensures reliable data transmission in noisy environments.
• Low quiescent current makes it energy-efficient.
• Fail-safe circuitry enhances system reliability.

Disadvantages

• Limited to half-duplex communication only.
• May require additional components for full RS-485 functionality.

Working Principles

ST485BDR operates based on the principles of differential signaling. It uses a balanced transmission line to transmit data, which provides noise rejection and allows for long-distance communication. The driver section converts logic signals into differential voltages, while the receiver section converts differential voltages back into logic signals.

Detailed Application Field Plans

ST485BDR finds applications in various fields, including but not limited to: 1. Industrial automation 2. Building automation 3. Process control systems 4. Instrumentation 5. Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to ST485BDR are: 1. MAX485 2. SN75176 3. LTC485 4. ADM485 5. SP485

These models offer similar functionality and can be used as substitutes depending on specific requirements.

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