1 Features

• Meets or exceeds the requirements of the TIA/

EIA-485A standard

• 3-V to 5.5-V RS-485 Supply voltage

• Differential output exceeds 2.1 V for PROFIBUS

compatibility with 5-V supply

• 1.65 V to 5.5 V Supply for logic signal interface

• Half-duplex RS-422/RS-485

• Maximum Data rate configurable

– SLR = High: 500 kbps

– SLR = Low or floating: 20 Mbps

• Bus I/O protection

– ±16-kV HBM ESD

– ±12-kV IEC 61000-4-2 Contact discharge

– ±12-kV IEC 61000-4-2 Air gap discharge

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

– ±16-V bus fault protection (absolute maximum

voltage on bus pins)

• Extended industrial temperature range:

-40°C to 125°C

• Low power consumption

– Shutdown supply current < 5 μA

– Quiescent current during operation < 3 mA

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

capability

• Open, short, and idle bus failsafe

• 1/8 Unit load (Up to 256 bus nodes)

• Small, space-saving thermally efficient 10-pin

VSON package (3 mm x 3 mm)

2 Applications

• Factory automation & control

• Building automation

• Motor drives

• Power delivery

• Industrial transport

• HVAC systems

• Smart meters

• Communication Infrastructure

3 Description

The THVD1400V is a half-duplex RS-422/RS-485

transceiver for industrial applications. The device has

features such as 3 to 5.5 V bus supply, 1.65 V to

5.5 V low level logic interface support. This device has

slew rate select feature that enables it to be used at

two maximum speeds based on the SLR pin setting.

Separate logic supply pin eliminates the need for an

additional level shifter when the MCU and RS-485

transceivers are operating with different supplies.

The bus pins are immune to high levels of IEC

Contact Discharge ESD events eliminating the need

for additional system level protection components.

The wide common-mode voltage range and low input

leakage on bus pins makes the device suitable for

multi-point applications over long cable runs.

THVD1400V is available in space-saving thermally

efficient 10-VSON package (3 mm x 3 mm). The

device is characterized for ambient temperature from

–40°C to 125°C.