ISL8485ECBZ

Product Overview

Category: Integrated Circuit (IC)

Use: ISL8485ECBZ is a high-speed, 5V powered, single-channel transceiver that meets the specifications of RS-485 and RS-422 serial communication standards. It is designed for applications requiring robust data transmission over long distances in noisy environments.

Characteristics: - High-speed data transmission - Robust performance in noisy environments - Wide operating voltage range (3V to 5.5V) - Low power consumption - ESD protection on bus pins - Half-duplex communication mode

Package: The ISL8485ECBZ is available in a small outline package (SOIC) with 8 pins.

Essence: This IC serves as a reliable interface between microcontrollers or other digital devices and the RS-485/RS-422 communication bus. It ensures accurate and efficient data transfer in industrial automation, building automation, and other similar applications.

Packaging/Quantity: The ISL8485ECBZ is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 3V to 5.5V
• Data Rate: Up to 20Mbps
• Operating Temperature Range: -40°C to +85°C
• Receiver Input Voltage Range: -7V to +12V
• Driver Output Voltage Swing: ±2V into 54Ω load
• Quiescent Current: 300μA (typical)
• ESD Protection: ±15kV (Human Body Model)

Pin Configuration

The ISL8485ECBZ has the following pin configuration:

```

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| | --| Vcc B |-- --| A Y |-- --| GND Z |-- |___________| ```

• Vcc: Power supply pin (3V to 5.5V)
• A, B: Differential bus pins
• Y, Z: Receiver and driver pins
• GND: Ground pin

Functional Features

1. High-Speed Data Transmission: The ISL8485ECBZ supports data rates up to 20Mbps, enabling fast and efficient communication.

2. Robust Performance in Noisy Environments: With built-in ESD protection and enhanced noise immunity, this transceiver ensures reliable data transmission even in electrically noisy industrial environments.

3. Wide Operating Voltage Range: The IC can operate within a wide voltage range of 3V to 5.5V, making it compatible with various power supply systems.

4. Low Power Consumption: The ISL8485ECBZ is designed to minimize power consumption, making it suitable for battery-powered applications.

5. Half-Duplex Communication Mode: This transceiver supports half-duplex communication, allowing bidirectional data flow on a single pair of wires.

Advantages and Disadvantages

Advantages: - High-speed data transmission capability - Robust performance in noisy environments - Wide operating voltage range - Low power consumption - ESD protection on bus pins

Disadvantages: - Limited to single-channel communication - Requires external components for complete RS-485/RS-422 functionality

Working Principles

The ISL8485ECBZ operates based on the principles of differential signaling. It uses a balanced pair of wires for transmitting and receiving data, which provides excellent noise rejection and common-mode voltage tolerance. The transceiver converts the digital signals from the microcontroller into differential voltages suitable for transmission over long distances. On the receiving end, it converts the differential signals back into digital form for further processing.

Detailed Application Field Plans

The ISL8485ECBZ is widely used in various industrial automation and building automation applications, including: - Factory automation systems - Process control systems - HVAC (Heating, Ventilation, and Air Conditioning) systems - Access control systems - Security systems - Energy management systems

Detailed and Complete Alternative Models

1. MAX485: Similar to the ISL8485ECBZ, the MAX485 is a low-power transceiver that meets RS-485/RS-422 standards. It offers similar features and performance characteristics.
2. SN75176: This IC is another popular choice for RS-485/RS-422 communication. It provides high-speed data transmission and robust noise immunity.

These alternative models can be considered based on specific application requirements and availability.

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