HDMIULC6-4SC6 datasheet(8/11 Pages) STMICROELECTRONICS

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Technical information

HDMIULC6-4SC6

8/11

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

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 RL2 is α2VG2, in fact the real voltage at this point

has got an extra value

β21VG1. This part of the VG1 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 k

Ω).

Figure 12.

Remaining voltage after the

HDMIULC6-4SC6 during

positive ESD surge

Figure 13.

Remaining voltage after the

HDMIULC6-4SC6 during

negative ESD surge

Line 1

Line 2

VG1

VG2

RG1

RG2

DRIVERS

RL1

RL2

RECEIVERS

VG1

VG2

VG1

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