The sample layout pictures bot(tom) and top depict a TMC239 / TMC 249 two layer layout example, realized on the TMC239/249 and TMC428 evaluation board. It shows how the output transistors can be equipped with enough cooling space for good heat dissipation and the required symmetrical layout. The sense resistors are located left and right of the transistors, the high-side sense with voltage divider is above the transistors. There is an optional 0 Ohms resistor under the TMC239, shorting SDO to SDI, when the IC is not equipped.