1 Features
• Meets the requirements of ISO 11898-2:2016
physical layer standards
– Support of Classical CAN: 1 Mbps
– Optimized for CAN FD: 2 and 5 Mbps
• Integrated DC-DC converter with low-emissions,
low-noise
– Meets CISPR 32 and EN 55032 Class B with
greater than 6 dB margin on a two-layer PCB
– Low frequency power converter at 25 MHz
enabling low noise performance
• Additional 10 Mbps GPIO channel
• High efficiency output power
– Typical efficiency: 47%
– Isolated output voltage accuracy: ± 5%
– Additional output current: 20 mA
• Independent power supply for CAN & DC-DC
– Logic supply (VIO): 1.71 V to 5.5 V
– Power converter supply ( VDD): 4.5 V to 5.5 V
• Fault-Protected CAN FD Transceiver
– DC Bus fault protection voltage: ± 58V
– Receiver common mode input voltage: ±12 V
– Remote wakeup via BUS wake-up pattern
• Typical loop delay: 167 ns
• Reinforced and Basic isolation options
• High CMTI: 100-kV/μs (typical)
• High ESD bus protection w.r.t GND2
– HBM ESD: ±12 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
• Safety-Related Certifications planned:
– 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 ISOW1044 device is a galvanically-isolated
controller area network (CAN) transceiver with a
built-in isolated DC-DC converter that eliminates the
need for a separate isolated power supply in spaceconstrained
isolated designs. The low-emissions,
isolated DC-DC 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 10 Mbps GPIO channel is
available and can help remove an additional digital
isolator or optocoupler for diagnotstics, LED indication
or supply monitoring.