YLPTEC TDA51S485HC

TDA51S485HC is an isolated half-duplex enhanced transceiver designed for RS-485 bus networks, featuring high electromagnetic immunity and low emission characteristics, fully compliant with the TIA/EIA-485-A standard. Its bus receiver adopts a 1/8 unit load design, supporting up to 256 nodes on the bus to meet multi-node design requirements, with a bus transmission rate of up to 500kbps. The device provides high isolation capability, effectively preventing noise and surges on the data bus or other circuits from entering the local ground, thereby avoiding interference with or damage to sensitive circuits. Its high common-mode transient immunity ensures correct transmission of digital signals. Building on conventional IC design, this product places particular emphasis on the reliability of pins A and B, incorporating driver overcurrent protection and enhanced ESD design. The ESD withstand capability of the A and B ports reaches 6kV (Human Body Model) and ±15kV (contact discharge).

• Ultra-compact, ultra-thin chip-scale SOIC16 package
• Compliant with TIA/EIA-485-A standard
• Wide supply voltage range: 3.15V to 5.5V
• Integrated high-efficiency isolated power supply with overload and short-circuit protection
• I/O voltage range supports 3.3V and 5V microprocessors
• Isolation voltage up to 5000Vrms
• Bus ESD protection up to 6kV (HBM) / ±15kV (contact discharge)
• Communication data rate: 500kbps
• High common-mode transient immunity: 150kV/μs (typical)
• Nanosecond-level communication propagation delay
• 1/8 unit load, bus loading capacity up to 256 nodes
• Bus fail-safe protection
• Bus driver short-circuit protection
• Industrial operating temperature range: -40℃ to +105℃

• Industrial automation
• Building automation
• Smart metering
• Long-distance signal interaction and transmission