LTC485CN8#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: LTC485CN8#PBF is a low power differential bus/line transceiver designed for bidirectional data communication on multipoint bus transmission lines. It is commonly used in industrial control systems, building automation, and other applications that require reliable long-distance data transmission.

Characteristics: - Low power consumption - High noise immunity - Wide common mode range - Robust ESD protection - Supports extended temperature range (-40°C to 85°C) - Compatible with RS-485 and RS-422 standards

Package: LTC485CN8#PBF is available in an 8-pin plastic DIP (Dual In-line Package) package.

Essence: The essence of LTC485CN8#PBF lies in its ability to provide reliable and efficient data communication over long distances in harsh industrial environments.

Packaging/Quantity: LTC485CN8#PBF is typically sold in reels or tubes, with a quantity of 98 units per reel/tube.

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Data Rate: Up to 20Mbps
• Number of Drivers/Receivers: 1 Driver, 1 Receiver
• Operating Temperature Range: -40°C to 85°C
• Input/Output Logic Levels: CMOS/TTL compatible

Pin Configuration

LTC485CN8#PBF follows the standard 8-pin DIP pin configuration:

```

---

| | --| VCC |-- --| A |-- --| B |-- --| GND |-- --| Y |-- --| Z |-- --| RE |-- |___________| ```

Functional Features

• Bidirectional data transmission
• High noise immunity through differential signaling
• Receiver input threshold hysteresis for improved noise rejection
• Driver output current limiting and thermal shutdown protection
• Receiver input failsafe feature to ensure a known state when the bus is idle

Advantages

• Low power consumption makes it suitable for battery-powered applications
• Wide common mode range allows for reliable operation in noisy environments
• Robust ESD protection safeguards against electrostatic discharge events
• Supports high-speed data rates up to 20Mbps
• Compatible with industry-standard RS-485 and RS-422 interfaces

Disadvantages

• Limited number of drivers/receivers (1 driver, 1 receiver)
• Requires external components for complete functionality (e.g., termination resistors)

Working Principles

LTC485CN8#PBF operates based on the principles of differential signaling. It uses two wires, A and B, to transmit data as voltage differences between them. The receiver compares the voltage difference between A and B to determine the logic level of the received data.

When transmitting, the driver converts the logic level signals into differential voltages on the A and B lines. This differential signaling provides high noise immunity and allows for long-distance communication.

Application Field Plans

LTC485CN8#PBF finds extensive use in various industrial applications, including: - Industrial control systems - Building automation - Process control - HVAC (Heating, Ventilation, and Air Conditioning) systems - Access control systems - Security systems

Alternative Models

For similar functionality, the following alternative models can be considered: - MAX485 - SN75176 - ADM485 - SP485 - ST485

These models offer comparable features and are widely used in the industry.

In conclusion, LTC485CN8#PBF is a versatile integrated circuit designed for reliable bidirectional data communication over long distances. Its low power consumption, high noise immunity, and compatibility with industry standards make it a popular choice in industrial control systems and other applications requiring robust data transmission.