1 Features

• Meets or exceeds the requirements of the TIA/

EIA-485A standard

• Data rates

– ISOW1412 : 500 kbps

– ISOW1432 : 12 Mbps

• Integrated low-emissions DC-DC converter with

low-emissions, low-noise

– Meets CISPR 32 Class B and EN 55032 Class

B with margin on a two-layer PCB

– Low frequency power converter at 25 MHz

enabling low noise performance

• Additional 2 Mbps GPIO channel

• High efficiency output power

– Typical efficiency: 46%

– VISOOUT accuracy: ±5%

– Additional output current: 20 mA

• Independent power supply for RS-485 & DC-DC

– Logic supply (VIO): 1.71 V to 5.5 V

– Power converter supply ( VDD): 3 V to 5.5 V

• RS-485 with PROFIBUS compatibility

– Open, short, and idle bus failsafe

– 1/8 unit load: up to 256 nodes on bus

– Glitch-free power up and power down

• Reinforced and Basic isolation options

• High CMTI: 100-kV/μs (typical)

• High ESD bus protection

– HBM: ±16 kV

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

• Operating temperature range: -40°C to 125°C

• Current limit and thermal shutdown

• 20-pin wide SOIC package

• Section 8.6:

– VDE reinforced and basic insulation per DIN

VDE V 0884-11:2017-01

– UL 1577 component recognition program

– IEC 62368-1, IEC 61010-1, IEC 60601-1 and

GB 4943.1-2011 certifications

2 Applications

• Factory automation

• Building automation

• Industrial transport

• Solar inverters, protection relay

• Motor drives

3 Description

The ISOW14x2 devices are galvanically-isolated

RS-485/RS-422 transceivers with a built-in isolated

DC-DC converter, that eliminates the need for a

separate isolated power supply in space constrained

isolated designs. The low-emissions, isolated DCDC

converter meets CISPR 32 radiated emissions

Class B standard with just two ferrite beads on

a simple two-layer PCB. Additional 20 mA output

current can be used to power other circuits on the

board. An integrated 2 Mbps GPIO channel helps

remove any additional digital isolator or optocoupler

for diagnotstics, LED indication or supply monitoring.