The exit from the pad should be logical.
Differential signal lines typically carry high-speed signals that must adhere to impedance symmetry. Differential lines cannot cross one another, and their lengths cannot differ by more than 100 mils. Between differential lines and between a single differential line and ground, certain impedance criteria must be met. Maximum differential trace vias are 4. The 3W rule is satisfied by the distance between differential pairs. In general, crystal oscillators, pll filter components, analog processing signal processing chips, inductors, and transformers are exempt from the prohibition on clock lines, control lines, and electromagnetically sensitive lines.