DS22EV5110-EVKC National Semiconductor, DS22EV5110-EVKC Datasheet - Page 13

• Manufacturer Part Number: DS22EV5110-EVKC
• Description: DEMO KIT CAT5 EXTENDER HDMI
• Manufacturer: National Semiconductor

Specifications of DS22EV5110-EVKC

• Main Purpose: Video, Cable Extender
• Embedded: No
• Utilized Ic / Part: DS22EV5110
• Primary Attributes: DVI/HDMI Extended Reach Equalizer with Retimer and Output De-Emphasis
• Secondary Attributes: HDMI Extender for CAT5 & CAT6 Cables
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1080P 36-bit (2.25 Gbps)
CABLE SELECTION AND INTER-PAIR SKEW
DVI v1.0 and HDMI v1.3a specify Inter-Pair Skew require-
ments for the system. The DS22EV5110 intends to extend the
longer cable reach with STP (DVI / HDMI) cable, or UTP
(Cat5 / Cat5e / Cat6) cable, and it does not have a de-skew
function to compensate any cable Inter-Pair Skews. Long ca-
ble with Inter-Pair Skew exceeding the DVI / HDMI standard
limit tolerance could cause system distortion. Therefore, Na-
tional suggests the consideration of Inter-Pair Skew budget
during the system design, and recommends Low-Skew Video
grade cables for cable extending applications.
28 AWG STP (SHIELDED TWIST PAIRS) DVI / HDMI
CABLES RECOMMENDED EQ SETTINGS
Table 4
various data rates and cable lengths for 28 AWG DVI/HDMI
compliant configurations. The EQ setting is made via three
EQ [2:0] pins.
Format (Data Rate)
1080P (1.65 Gbps)
1080I (750 Mbps)
TABLE 4. EQ Control Setting for STP Cable
provides the recommended EQ control settings for
Setting 0x01
Setting 0x01
Setting 0x06
0 ~ 10m
FIGURE 10. AC Coupled Application
Setting 0x06
Setting 0x06
Setting 0x06
> 10m
13
Format (Data Rate)
1080P 36-bit (2.25 Gbps) Setting 0x01
1080P (1.65 Gbps)
1080I (750 Mbps)
24 AWG UTP (LOW SKEW UNSHIELDED TWIST PAIRS)
CABLES
The DS22EV5110 can be used to extend the length of low
skew grade UTP cables, such as Cat5e and Cat6 to distances
greater than 30 meters at 1.65 Gbps with < 0.20 UI of jitter.
Note that for non-standard DVI/HDMI cables, the user must
ensure the inter pair skew requirements are met.
shows the recommended EQ control settings for various data
rates and cable lengths for UTP configurations.
TABLE 5. EQ Control Setting for UTP Cable
0 ~ 10m
Setting 0x01
Setting 0x05
30094921
> 10m
Setting 0x05
Setting 0x05
Setting 0x05
www.national.com
Table 5