ST485ECN

Product Overview

• Category: Integrated Circuit
• Use: Communication and Networking
• Characteristics: High-speed, low-power transceiver for RS-485 and RS-422 communication
• Package: DIP-8, SO-8, TSSOP-14
• Essence: Transceiver IC
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 4.75V to 5.25V
• Data Rate: Up to 20 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Channels: 1
• Receiver Hysteresis: 50mV
• Driver Output Current: ±60mA
• Shutdown Mode: Yes

Detailed Pin Configuration

The ST485ECN has a total of 8 pins:

1. DE (Driver Enable)
2. RE (Receiver Enable)
3. A (Non-Inverting Data Line A)
4. B (Inverting Data Line B)
5. GND (Ground)
6. Y (Receiver Output)
7. Z (Driver Output)
8. VCC (Supply Voltage)

Functional Features

• Supports RS-485 and RS-422 standards
• Half-duplex communication
• Low power consumption
• Enhanced ESD protection
• Thermal shutdown protection
• Receiver input hysteresis for noise immunity
• Driver output short-circuit protection

Advantages and Disadvantages

Advantages: - High-speed data transmission - Wide operating temperature range - Robust ESD protection - Flexible enable/disable control - Small package options for space-constrained applications

Disadvantages: - Limited to half-duplex communication - Requires external components for complete communication system

Working Principles

The ST485ECN is a transceiver IC designed for RS-485 and RS-422 communication. It operates in half-duplex mode, allowing bidirectional data transmission over a single twisted-pair cable. The DE (Driver Enable) and RE (Receiver Enable) pins control the direction of data flow.

When DE is high and RE is low, the driver is enabled, allowing data to be transmitted from the A input to the B output. When DE is low and RE is high, the receiver is enabled, allowing data to be received on the A and B inputs and outputted on the Y pin.

The transceiver features thermal shutdown protection, which disables the driver outputs in case of excessive temperature. It also provides enhanced ESD protection to safeguard against electrostatic discharge events.

Detailed Application Field Plans

The ST485ECN is widely used in various applications that require reliable long-distance communication, such as:

1. Industrial Automation: Used in PLCs, motor control systems, and industrial sensors for robust communication in harsh environments.
2. Building Automation: Enables communication between different building automation devices, including HVAC systems, lighting controls, and access control systems.
3. Instrumentation: Facilitates communication between measurement instruments, data loggers, and control systems in laboratory and industrial settings.
4. Automotive: Used in automotive electronics for communication between different vehicle modules, such as engine control units and body control modules.
5. Renewable Energy Systems: Enables communication between solar inverters, wind turbines, and energy management systems for efficient power generation and distribution.

Detailed and Complete Alternative Models

1. MAX485: Similar functionality and pin configuration, available in DIP-8 and SO-8 packages.
2. SN75176: Compatible with RS-485 standard, available in DIP-8 and SO-8 packages.
3. LTC485: Low-power RS-485 transceiver, available in DIP-8 and SO-8 packages.
4. ADM485: Full-duplex RS-485 transceiver, available in DIP-8 and SO-8 packages.

These alternative models provide similar functionality to the ST485ECN and can be considered as alternatives based on specific application requirements.

In conclusion, the ST485ECN is a high-speed, low-power transceiver IC designed for RS-485 and RS-422 communication. It offers reliable data transmission, robust protection features, and wide operating temperature range. With its various package options and compatibility with industry standards, it finds applications in diverse fields such as industrial automation, building automation, instrumentation, automotive, and renewable energy systems.