1 Features

1• 1/8 Unit-Load Options Available

– Up to 256 Nodes on the Bus

• Bus I/O Protection

– > ±30 kV HBM protection

– > ±16 kV IEC61000-4-2 Contact Discharge

– > ±4 kV IEC61000-4-4 Fast Transient Burst

• Extended Industrial Temperature Range:

–40°C to 125°C

• Large Receiver Hysteresis (70 mV) for Noise

Rejection

• Low Power Consumption

– < 1.1 mA Quiescent Current During Operation

– Low Standby Supply Current: 10 nA Typical,

< 5 μA (maximum)

• Glitch-Free Power-Up and Power-Down Protection

for Hot-Plugging Applications

• 5-V Tolerant Logic Inputs Compatible With 3.3-V

or 5-V Controllers

• Signaling Rate Options Optimized for:

400 kbps (1470, 1471), 20 Mbps (1473, 1474), 50

Mbps (1476, 1477)

2 Applications

• Industrial Automation

• Encoders and Decoders

• Building Automation

• Security and Surveillance Networks

• Telecommunications

3 Description

The SN65HVD147x family of full-duplex transceivers

feature the highest ESD protection in the RS-485

portfolio, supporting ±16-kV IEC61000-4-2 contact

discharge and > ±30-kV HBM ESD protection. These

RS-485 transceivers have robust 3.3-V drivers and

receivers and are offered in a standard SOIC

package as well as in a small-footprint MSOP

package. The large receiver hysteresis of the

SN65HVD147x devices provides immunity to

conducted differential noise and the wide operating

temperature enables reliability in harsh operating

environments.

These devices each combine a differential driver and

a differential receiver, which operate from a single

3.3-V power supply. Each driver and receiver has

separate input and output pins for full-duplex bus

communication designs. These devices all feature a

wide common-mode voltage range which makes the

devices suitable for multi-point applications over long

cable runs.

The SN65HVD1471, SN65HVD1474, and

SN65HVD1477 devices are fully enabled with no

external enabling pins.

The SN65HVD1470, SN65HVD1473, and

SN65HVD1476 devices have 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.

These devices are characterized from –40°C to

125°C.