HDMIULC6-4SC6 Datasheet, PDF (8/11 Pages) STMicroelectronics – Ultra large bandwidth ESD protection

Technical information
HDMIULC6-4SC6
Figure 12. Remaining voltage after the
HDMIULC6-4SC6 during
positive ESD surge
Figure 13. Remaining voltage after the
HDMIULC6-4SC6 during
negative ESD surge
Note:
The measurements have been done with the HDMIULC6-4SC6 in open circuit.
IMPORTANT:
An important precaution to take is to put the protection device as close as possible to the
disturbance source (generally the connector).
3.4
Crosstalk behavior
Figure 14. Crosstalk phenomena
R_G1
V_G1
R_G2
VG2
Line 1
Line 2
RL1
α₁V_G1 + β₁₂V_G2
RL2
α ₂V_G2 + β₂₁V_G1
DRIVERS
RECEIVERS
The crosstalk phenomena is due to the coupling between 2 lines. The coupling factor (β₁₂ or
β₂₁) increases when the gap across lines decreases, particularly in silicon dice. In the
example above the expected signal on load R_L2 is α₂V_G2, in fact the real voltage at this point
has got an extra value β₂₁V_G1. This part of the V_G1 signal represents the effect of the
crosstalk phenomenon of the line 1 on the line 2. This phenomenon has to be taken into
account when the drivers impose fast digital data or high frequency analog signals in the
disturbing line. The perturbed line will be more affected if it works with low voltage signal or
high load impedance (few kΩ).
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