1 Features

1• Meets or exceeds the requirements of the

TIA/EIA-485A standard

• 4.5-V to 5.5-V supply voltage

• 10 Mbps, Half-Duplex RS-422/RS-485

• Bus I/O protection

– ± 16-kV HBM ESD

– ± 8-kV IEC 61000-4-2 contact discharge

– ± 8-kV IEC 61000-4-2 air gap discharge

– ± 4-kV IEC 61000-4-4 fast transient burst

• Extended industrial temperature range: -40°C to

125°C

• Large receiver hysteresis for noise rejection

• Low power consumption

– Low standby supply current: < 1 μA

– Quiescent during operation: < 840 μA

• Glitch-free power-up/down for hot plug-in

capability

• Open, short and idle bus failsafe

• 1/8 unit load (up to 256 bus nodes)

2 Applications

• Factory Automation & Control

• Building Automation

• HVAC Systems

• Video Surveillance

• Smart Meters

3 Description

THVD1520 is a robust half-duplex RS-485 transceiver

for industrial applications. The bus pins are immune

to high levels of IEC contact discharge ESD events

eliminating the need of additional system-level

protection components.

The device operates from a single 5-V supply. The

wide common-mode voltage range and low input

leakage on bus pins make THVD1520 suitable for

multi-point applications over long cable runs.

THVD1520 is available in industry standard 8-pin

SOIC package for drop-in compatibility. The device is

characterized for ambient temperatures from .40°C

to 125°C.