High Output Full-Duplex RS 485 Drivers and Receivers

The SN65HVD5X devices are 3-state differential

line drivers and differential-input line receivers

that operate with a 5-V power supply. Each driver

and receiver has separate input and output pins

for full-duplex bus communication designs. They

are designed for balanced transmission lines and

interoperation with ANSI TIA/EIA-485A,

TIA/EIA-422-B, ITU-T v.11 and ISO 8482:1993

standard-compliant devices.

The SN65HVD50, SN65HVD51, and SN65HVD52 are fully

enabled with no external enabling pins.

The SN65HVD53, SN65HVD54, and SN65HVD55 have active-high driver enables and active-low

receiver enables. A low, less than 1 µA, standby current is achieved by disabling both the

driver and receiver.

All devices are characterized for operation from

–40°C to 85°C.

The high output feature of the SN65HVD5x provides

more noise margin than the typical RS-485 drivers.

The extra noise margin makes applications in long

cable and harsh noise environments possible.