SN75172N | Texas Instruments

Logic chip, SN75172N, Texas Instruments

The SN75172N is a monolithic quadruple differential line driver with a 3-state output. Designed to meet the requirement 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 a wide positive or negative common-mode output voltage range, making it suitable for party-line applications in noisy environments.

The SN75172N provides positive or negative current limiting and thermal shutdown for protection from a line fault condition 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 receiver.

Features

• Balanced-line operation
• High output impedance in power-off condition
• High-current active-pullup outputs
• Short-circuit protection
• Dual channels
• Input clamp diodes