Functional Description:

TDA51S485HC is a half-duplex enhanced transceiver designed for RS–485 data bus networks, which is fully compliant with TIA/EIA-485-Astandardand is suitable for data transmission of up to 500kbps. Receivers have an exceptionally high input impedance, which places only 1/8 of thestandardloadon a shared bus and up to 256 transceivers. The reliability design of A and B pin is emphasized, including driver output over current protection and enhanced ESD design. The ESDprotectionlevel of A, B pin can be up to 15kV (Human Body Model).

Features:

 Ultra-small, ultra-thin, chip scale SOIC 16 package

 Compliant with TIA/EIA-485-A standard

 Wide input supply range: 3.15 V to 5.5 V

 Integrated high-efficiency DC-DC converter with on-chip transformer;With overload and short-circuit protection

 I/O power supply range supports 3.3V and 5V microprocessors

 High isolation to 5000Vrms

 Bus-Pin ESD protection up to 6kV(HBM)/15kV(contact) 

 Baud rate up to 500kbps

 High CMTI:150kV/μs(typical) 

 Nanosecond communication delay

 1/8 unit load—up to 256 nodes on a bus

 Bus fail-safe

 Bus driver short circuit protection

 Industrial operating ambient temperature range: -40℃ to +105℃

Applications:

 Industrial Automation

 Building Automation

 Smart Electricity Meter 

 Remote Signal Interaction, Transmission