Maxim’s MAX148xx is a family of high-speed isolated CAN transceivers that improve communication and safety by integrating galvanic isolation between the controller side and the physical wires of the network. Isolation improves communication by breaking ground loops and reduces noise where there are large differences in ground potential between ports. The MAX14879 provides up to 2.75 kV_RMS of galvanic isolation, and the MAX14878 and MAX14880 provide up to 5 kV_RMS.

Interfacing with CAN protocol controllers is simplified by the wide 1.71 V to 5.5 V supply voltage range (V_DDA) on the controller side of the device. The receiver input common-mode range is ±25 V, exceeding the ISO 11898 specification of -2 V to +7 V, and is fault tolerant up to ±54 V. Driver outputs/receiver inputs are also protected from ±15 kV electrostatic discharge (ESD) to GNDB on the bus side, as specified by the Human Body Model (HBM).

The MAX14879 and MAX14880 feature an integrated standby input (STB) on the isolated side of the transceiver to disable the driver and place the transceiver in a low-power standby mode. The MAX14878 does not include the standby input. The transceivers operate up to the maximum high-speed CAN data rate of 1 Mbps and are available in a 16-pin SOIC package with 8 mm of creepage and clearance. This family can operate over the -40°C to +125°C temperature range.

Applications

• Building automation
• HVAC
• Industrial controls
• Switching gear