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.