1 Features

1• 1/8 Unit-load options available

– Up to 256 Nodes on the bus

• Bus I/O Protection

– > ±30-kV HBM protection

– > ±12-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 (70, 71), 20 Mbps (73, 74), 50 Mbps

(76, 77)

2 Applications

• E-meters

• Industrial automation

• Building automation

• Security and surveillance

• Encoders and decoders

3 Description

These devices extend the RS-485 portfolio with a

family of full-duplex transceivers 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 SN65HVD7x

devices provides immunity to conducted differential

noise and the wide operating temperature enables

reliability in harsh operating environments. The

SN65HVD7x devices are offered in a standard SOIC

package as well as in a small-footprint MSOP

package.

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 SN65HVD71, SN65HVD74, and SN65HVD77

devices are fully enabled with no external enabling

pins.

The SN65HVD70, SN65HVD73, and SN65HVD76

devices have active-high driver enables and activelow

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.