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15.6
Common High-Speed Interface
Requirements
Table 15-2 provides the common high-speed interface requirements.
Table 15-2.
Common High-Speed Interface Requirements
Parameter
Common-mode Choke (Not recommended – only used if absolutely required for EMI issues)
Preferred device
Location - Max distance from to adjacent discontinuities
– ex, connector, AC cap)
Common-mode impedance @ 100MHz
Max Rdc
Differential TDR impedance
Min Sdd21 @ 2.5GHz
Max Scc21 @ 2.5GHz
Serpentine
Min bend angle
Dimension
General
Routing over Voids
Noise Coupling
NVIDIA Jetson TX2 NX
Requirement
8 (53)
Min/Max
65/90
0.3
90
2.22
19.2
135
Min A Spacing
4x
Min B, C Length
1.5x
Min Jog Width
3x
Routing over voids not allowed except void around device ball/pin the signal is
routed to.
Keep critical high-speed traces away from other signal traces or unrelated
power traces/areas or power supply components
General Routing Guidelines
Units
Notes
Type: TDK ACM2012D-900-2P. Only if needed.
Place near connector. See Figure 15-2
mm (ps)
TDK ACM2012D-900-2P
See Figure 15-2
Ω
Ω
@T
-200ps (10%-90%)
R
Ω
dB
dB
deg (α)
S1 must be taken care in order to consider Xtalk
to adjacent pair. See Figure 15-3
Trace
width
DG-10141-001_v1.1 | 74
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