ISOW1044

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 space-constrained 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 20mA output current can be used to power other circuits on the board. An integrated 10Mbps GPIO channel is available and can help remove an additional digital isolator or optocoupler for diagnostics, LED indication or supply monitoring.

The device supports both classical CAN and CAN FD networks up to 5 Megabits per second (Mbps) data rate. The device offers ±58V DC bus fault protection and ±12V common-mode voltage range. Both signal and power paths are 5kVRMS isolated per UL1577 and are qualified for reinforced and basic isolation per VDE, CSA, TUV and CQC. The bus pins of these devices can endure up to 8kV of IEC 61000-4-2 electrostatic discharge (ESD),.

The ISOW1044 device can operate from a single supply voltage of 4.5V to 5.5V by connecting VIO and VDD together on PCB. If lower logic levels are required, these devices support 1.71V to 5.5V logic supply (VIO) that can be independent from the power converter supply (VDD) of 4.5V to 5.5V. This device supports a wide operating ambient temperature range from –40°C to +125°C and are available in 20-pin DFM (SOIC-20 footprint compatible package) offering a minimum of 8mm creepage and clearance.

The ISOW1044 supports a standby mode and wake over CAN compliant to the ISO 11898-2:2016 defined wake-up pattern (WUP). The device also includes protection and diagnostic features supporting thermal-shutdown (TSD), TXD dominant time-out (DTO) and supply undervoltage detection.