In an electrical power steering subsystem, two microcontrollers are used to maintain continued operation during a failure event. Both MCUs communicate with each other, but one serves as a redundant backup in case the primary MCU stops functioning. While both MCUs are typically referenced to a common ground, high current loads in the system can introduce ground shifts between the two domains. Traditionally, digital isolators are used to manage these ground differences. However, galvanic isolation is not required in this case, and the TXG4041-Q1 is a more compact and cost-effective alternative as shown in Figure 3-2.

Figure 3-7 Block Diagram for Electrical Power Steering System using TXG4041-Q1