SN65HVD74 Full-Duplex Transceiver

Texas Instruments' SN65HVD74 device extends the RS-485 portfolio with a full-duplex transceiver with robust 3.3 V drivers and receivers, and high levels of ESD protection. The ESD protection includes > ±30 kV HBM and > ±12 kV IEC61000-4-2 contact discharge. The large receiver hysteresis of the SN65HVD74 device provides immunity to conducted differential noise and the wide operating temperature enables reliability in harsh operating environments.

This device combines a differential driver and a differential receiver, which operate from a single 3.3 V power supply. Each driver and receiver have separate input and output pins for full-duplex bus communication designs. The SN65HVD74 also features a wide common-mode voltage range which makes it suitable for multi-point applications over long cable runs. This device is also fully enabled with no external enabling pins, and has active-high driver enables and active-low receiver enables. A low, less than 5 µA standby current can be achieved by disabling both the driver and receiver.