Nvidia Jetson TX2 Manual page 49

Parameter
Min Sdd21 @ 2.5GHz
Max Scc21 @ 2.5GHz
Location
ESD (On-chip protection diode is able to withstand 2kV HMM. External ESD is optional. Designs should include ESD footprint as a stuffing option)
Max junction capacitance
(IO to GND)
Footprint
Location
Void
Series Resistor (R ) – Series resistor on P/N path for HDMI 2.0 (Mandatory)
S
Value
Location
Void
Trace at Component Region
Value
Location
Trace entering the SMT pad
Trace between components
HDMI Connector
Connector Voiding
General
Routing over Voids
Noise Coupling
Note: Longer trace lengths may be possible if the total trace loss is equal to or better than the target. If the loss is greater, the
1.
max trace lengths will need to be reduced.
The average of the differential signals is used for length matching.
2.
Do not perform length matching within breakout region. Recommend doing trace length matching to <1ps before vias or
3.
any discontinuity to minimize common mode conversion
If routing includes a flex or 2
4.
Solutions with flex/2
JETSON TX2/TX2i OEM PRODUCT | DESIGN GUIDE | 20180618
Requirement
2.22
19.2
Close to any adjacent discontinuity (< 8mm) – such as
connector, via, etc.
0.35
Pad right on the net instead of trace stub
After pull-down resistor/CMC and before R
GND/PWR void under/above the cap is needed. Void
size = 1mm x 2mm for 1 pair
≤ 6
After all components and before HDMI connector
GND/PWR void under/above the R
Void size = SMT area + 1x dielectric height keepout
distance.
100
At component region (Microstrip)
One 45°
Uncoupled structure
Voiding the ground below the signal lanes
0.1448(5.7mil) larger than the pin itself
Routing over voids not allowed except void around device ball/pin the signal is routed to.
Keep critical HDMI related traces including differential clock/data traces & RSET trace away from other signal
traces or unrelated power traces/areas or power supply components
nd
PCB, the max trace delay & skew calculations must include all the PCBs/flex routing.
nd
PCB may not achieve maximum frequency operation.
NVIDIA Jetson TX2/TX2i OEM Product Design Guide
Units Notes
dB
dB
pF e.g. ON-semiconductor ESD8040
S
Ω ± 10%. 0ohm is acceptable if the design passes the
HDMI2.0 HF1-9 test. Otherwise, adjust the R
ensure the HDMI2.0 tests pass: Eye diagram, Vlow test
and HF1-9 TDR test
device is needed.
S
Ω ± 10%
value to
S
49