SN75172

• Meets or Exceeds the Requirements of ANSI Standards EIA/TIA-422-B and RS-485 and ITU Recommendation V.11
• Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments
• 3-State Outputs
• Common-Mode Output Voltage Range of
  -7 V to 12 V
• Active-High and Active-Low Enables
• Thermal Shutdown Protection
• Positive- and Negative-Current Limiting
• Operates From Single 5-V Supply
• Logically Interchangeable With AM26LS31

The SN75172 is a monolithic quadruple differential line driver with 3-state outputs. It is designed to meet the requirements of ANSI Standards EIA/TIA-422-B and RS-485 and ITU Recommendation V.11. The device is optimized for balanced multipoint bus transmission at rates of up to 4 megabaud. Each driver features wide positive and negative common-mode output voltage ranges, making it suitable for party-line applications in noisy environments.

The SN75172 provides positive- and negative-current limiting and thermal shutdown for protection from line fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of approximately 150°C. This device offers optimum performance when used with the SN75173 or SN75175 quadruple differential line receivers.

The SN75172 is characterized for operation from 0°C to 70°C.