The SP485BN is a low-power half-duplex RS-485 transceiver from Exar Corporation. It is designed for robust communication in noisy industrial environments and is suitable for a wide range of applications that require reliable data transmission over long distances. This transceiver offers enhanced protection against electrostatic discharge (ESD), making it ideal for use in harsh conditions where electrical surges are common.

Applications:

• Industrial control systems
• Building automation
• Motor control
• Remote sensor networks
• Security systems
• Point-of-sale (POS) terminals

Features:

• Half-duplex RS-485 transceiver
• Low power consumption
• Data rates up to 10Mbps
• Enhanced ESD protection: ±15kV HBM
• Single 5V supply
• Thermal shutdown protection
• Current limiting for driver overload protection
• Driver output short-circuit protection
• Receiver input hysteresis for noise rejection

Benefits:

• Robust communication: Provides reliable data transmission in noisy environments thanks to its high ESD protection and receiver hysteresis.
• Energy efficient: Low power consumption makes it suitable for battery-powered applications or systems where energy conservation is critical.
• High-speed data transfer: Supports data rates up to 10Mbps, enabling fast and efficient communication.
• Protection against damage: Built-in thermal shutdown and current limiting features protect the device from overheating and overcurrent conditions, ensuring long-term reliability.
• Ease of use: Single 5V supply and industry-standard pinout simplify design and integration into existing systems.

The SP485BN is designed to meet the TIA/EIA-485 standard. It integrates a driver and receiver in a single package. The driver is differential, providing high noise immunity and enabling communication over long distances. The receiver incorporates hysteresis to improve noise rejection and prevent false triggering. This component is available in an 8-pin PDIP package.