The SN75ALS174A is a quadruple line driver with 3-state differential outputs. It is designed to meet the requirements of ANSI Standards EIA/TIA-422-B and RS-485. This device is optimized for balanced multipoint bus transmission at rates of up to 20 Mbit/s. Each driver features wide positive and negative common-mode output voltage ranges that make them suitable for party-line applications in noisy environments.

The SN75ALS174A 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.

The SN75ALS174A is characterized for operation from 0°C to 70°C.

H = high level, L = low level, X = irrelevant, Z = high impedance (off)

• Meets or Exceeds the Requirements of ANSI EIA/TIA-422-B and RS-485
• High-Speed Advanced Low-Power Schottky Circuitry
• Designed for up to 20-Mbit/s Operation in Both Serial and Parallel Applications
• Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments
• Low Supply Current Requirements 55 mA Max
• Wide Positive and Negative Input/Output Bus Voltage Ranges
• Driver Output Capacity...±60 mA
• Thermal-Shutdown Protection
• Driver Positive- and Negative-Current Limiting
• Functionally Interchangeable With SN75174