SN65HVD22DR UART Interface IC RS-485 Interface IC Extended Common-mode Transceiver

1 Features

• Common-Mode Voltage Range (–20 V to 25 V) More Than Doubles TIA/EIA-485 Requirement

• Receiver Equalization Extends Cable LeCM GROUPh, Signaling Rate (SN65HVD2[3,4])

• Reduced Unit-Load for up to 256 Nodes

• Bus I/O Protection to Over 16-kV HBM

• Failsafe Receiver for Open-Circuit, Short-Circuit, and Idle-Bus Conditions

• Low Standby Supply Current 1 μA (Maximum)

• More Than 100 mV Receiver Hysteresis

2 Applications

• Long Cable Solutions

  • – Factory Automation

  • – Security Networks

  • – Building HVAC

• Severe Electrical Environments

  • – Electrical Power Inverters

  • – Industrial Drives

  • – Avionics

The transceivers in the SN65HVD2x family offer performance far exceeding typical RS-485 devices. In addition to meeting all requirements of the TIA/EIA‐485-A standard. The SN65HVD2x family operates over an extended range of common-mode voltages and has features such as high ESD protection, wide receiver hysteresis, and failsafe operation. This family of devices is ideally suited for long-cable networks and other applications where the environment is too harsh for ordinary transceivers.

These devices are designed for bidirectional data transmission on multipoint twisted-pair cables. Example applications are digital motor controllers, remote sensors and terminals, industrial process control, security stations, and environmental control systems.

These devices combine a 3-state differential driver and a differential receiver that operate from a single 5-V power supply. The driver differential outputs and the receiver differential inputs are connected internally to form a differential bus port that offers minimum loading to the bus. This port features an extended common-mode voltage range, making the device suitable for multipoint applications over long cable runs.

Device Information