OrCAD X Resources

4. Also, enable all checks in the Physical and Spacing Categories as well. In general, you want to enable all Electrical, Physical, and Spacing Constraints when working with high-speed constraints. Signal Integrity Impedance Control: Specification for controlled impedance traces for high-speed signals Diagram showing a PCB copper wire with signal propagation 4 www.cadence.com OrCAD X Constraint Management Guide

• Cover
• Part 3 - Advanced Constraints
• Constraint Modes
• Signal Integrity
• Impedance Control: Specification for controlled impedance traces for high-speed signals
• Crosstalk Mitigation: Maximum parallel trace length
• EMC and EMI
• Return Path
• High-speed constraints/electrical design rules:
• Min/max relative propagation delay: Controlling signal timing
• Critical Trace Length
• Length Matching
• Differential pairs (High-Speed)
• Other High-Speed Constraints
• Wiring topology
• Stub limits (Max Stub Length)
• Maximum stub exposed length
• Layer restrictions
• Maximum Via Count
• Example Constraints for Common Applications
• USB (Universal Serial Bus) Constraints
• Double Data Rate (DDR) Constraints
• Rigid-Flex PCB Constraints
• RF (Radio Frequency) Circuit Constraints
• Conclusion of Part 3 - Advanced Constraints