SN75ALS171DW

The Texas Instruments SN75ALS171DW is a triple differential bus transceiver IC designed for bidirectional data communication on multipoint bus transmission lines. It meets or exceeds ANSI EIA/TIA-422-B and RS-485 standards, as well as ITU Recommendation V.11. This transceiver features three independent drivers and three receivers, supporting half-duplex communication.

Key electrical characteristics include a wide operating voltage range of 4.75V to 5.25V, a receiver hysteresis of 60 mV, and a low pulse skew of 5 ns maximum. The driver output capacity is ±60 mA, and receiver input impedance is a minimum of 12 kΩ. It is capable of data transfers up to 20 million per second, making it suitable for high-speed applications.

Designed for multipoint transmission in noisy environments, the SN75ALS171DW operates within a temperature range of 0°C to 70°C. It is available in a 20-SOIC surface mount package, with standard tube packaging containing 25 units. The device offers glitch-free power-up and power-down protection, along with thermal shutdown protection and driver current limiting.

This transceiver is ideal for applications requiring robust and reliable differential signaling over long bus lines. Its design considerations include ensuring compatibility with standard communication protocols and providing protection against electrical disturbances.