SN65HVD20D SN65HVD20DR VP20 Interface IC Semiconductor Devices

SN65HVD1040D SN65HVD1040DRG4

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1 Features

• Common-mode voltage range (–20 V to 25 V)
more than doubles TIA/EIA-485 requirement
• Receiver equalization extends cable length,
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

3 Description

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 designed for longcable 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.

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