Differential Pair Calculator
Calculate impedance for differential signal routing
Trace Parameters
W
D+
S
D-
H
Dielectric (Er)
Ground Plane
Results
Differential Impedance (Zdiff)
101.5Ω
Single-Ended Z0
59.3 Ω
Odd-Mode Zodd
50.7 Ω
Coupling
14.5%
Prop. Delay
142.4 ps/in
Common Standards
USB 2.0
90Ω ± 10%
USB 3.0/3.1
90Ω ± 7%
HDMI
100Ω ± 10%
PCIe
85Ω ± 15%
LVDS
100Ω ± 10%
Design Tips
- Maintain consistent spacing along entire route
- Keep pairs tightly coupled for noise immunity
- Match trace lengths within 5 mils