GS8000 Data Sheet

Proprietary and Confidential

25544 - 3

May 2005

11 of 16

3.5 System Considerations

3.5.1 Device Power Up

Because the GS8000 was designed to operate in a multi-volt environment, any

power up sequence is allowed. The internal core and differential signal I/O buffers

may be powered up in any order.

Device pins may also be driven prior to power up without causing damage.

3.5.2 ESD Protection

The GS8000 has 2kV ESD protection on all pins. In addition, the device was

designed to work with ESD diodes on the input connectors. These external diodes

work with the chip to significantly increase overall system ESD protection.

The ESD diodes used in Gennum’s Application Reference Design (4.2 ESD

Diodes) provide ESD protection of greater than 8kV through air (test conducted in

accordance with IEC 61000-4-2 standard “Electrostatic Discharge Immunity Test”).

3.5.3 Cable Use

The GS8000 was designed for best performance when used with DVI

1.0-compliant and HDMI 1.1-compliant cables meeting the approximate loss

characteristic shown in Figure 3-1: Cable Loss Characteristic.

Figure 3-1: Cable Loss Characteristic

While the GS8000 will extend a range of DVI cable types and qualities, the device

gives optimum performance when used to extend high-quality cable.

Important parameters to consider when choosing a high quality DVI cable include

inter-pair and intra-pair skew. Cable length extension is maximized when cable

with low inter-pair and intra-pair skew is used. The GS8000 does not add

significant amounts of intra-pair or inter-pair skew. However, the skew added by

some long DVI cables can exceed the tolerance of some DVI receivers.

-80

-70

-60

-50

-40

-30

-20

-10

0

1M

10M

100M

1G

10G

Frequency (Hz)

15m

30m

50m