1 Features

• Meets or exceeds the requirements of the TIA/

EIA-485A and TIA/EIA-422B standards

• 3V to 5.5V supply voltage

• Differential output exceeds 2.1V for PROFIBUS

compatibility with 5V supply

• Bus I/O protection

– ±70V DC bus fault

– ±16kV HBM ESD

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

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

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

• Full-duplex devices available in two speed grades

– THVD2412: 250kbps

– THVD2442: 20Mbps

• Extended ambient temperature range: -40°C to

125°C

• Extended operational common-mode range: ±25V

• Enhanced receiver hysteresis for noise immunity

• Low power consumption

– Low shutdown supply current: < 10μA

– Current during operation: < 5.6mA

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

• Open, short, and idle bus failsafe

• Thermal shutdown

• 1/8 unit load (up to 256 bus nodes) in - 7V to 12V

common mode range

• Small 3mm x 3mm VSON package to save board

space

2 Applications

• Motor drives

• Factory automation and control

• HVAC systems

• Building automation

• Grid infrastructure

• Electricity meters

• Process analytics

• Video surveillance

3 Description

THVD2412 and THVD2442 are ±70V fault-protected,

full-duplex, RS-422/RS-485 transceivers operating on

a single 3V to 5.5V supply. Bus interface pins are

protected against overvoltage conditions during all

modes of operation ensuring robust communication in

rugged industrial environments.

These devices feature integrated IEC ESD

protection, eliminating the need for external

system-level protection components. Extended ±25V

input common-mode range ensures reliable data

communication over longer cable run lengths and/or

in the presence of large ground loop voltages.

Enhanced 250mV receiver hysteresis provides high

noise rejection. In addition, the receiver fail-safe

feature provides a logic high when the bus inputs are

open or shorted together.

THVD24x2 devices are available in small and

thermally efficient VSON packages for spaceconstrained

applications. These devices are

characterized over ambient temperature from –40°C

to 125°C.