CLC014AJE National Semiconductor, CLC014AJE Datasheet - Page 14

• Manufacturer Part Number: CLC014AJE
• Description: 07B4822
• Manufacturer: National Semiconductor

Specifications of CLC014AJE

• Ic Function: Adaptive Cable Equalizer
• Supply Voltage Range: 4.5V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SOIC
• No. Of Pins: 14
• Termination Type: SMD
• Rohs Compliant: No
• Filter Terminals: SMD
• Data Rate Max: 650Mbps
• Lead Free Status / Rohs Status: Not Compliant

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Typical Applications
DIGITAL VIDEO (SDV) ROUTERS
The CLC014 provides performance that complies with the
SMPTE 259M standard for serial digital video (SDV) trans-
mission over coaxial cable. One common application is in
SDV routers, which provide a switching matrix for connecting
video source equipment (e.g., cameras) to destination equip-
ment (e.g., video tape recorders, monitors, etc.).
Figure 12 shows a typical configuration for an SDV router,
including equalizers, a crosspoint switch, data retimers, and
cable drivers. The CLC014 is used in its standard configu-
ration in this application, and automatically equalizes cable
lengths from zero meters to greater than 300 meters at
360 MHz (see plots in Typical Performance Characteris-
tics section). The equalized outputs are connected to the
differential inputs of the crosspoint switch. The CLC016 Data
Retimer receives the data from the crosspoint and performs
the clock and data recovery functions, further reducing jitter.
Finally, the retimed data is driven into the coaxial cable by a
CLC006 Cable Driver (with two amplitude-adjustable out-
puts) or a CLC007 Cable Driver (with four outputs).
(Continued)
FIGURE 11. Typical Repeater Design
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TWISTED PAIR DRIVER
A low-cost medium for transmitting data is twisted pair. Cat-
egory 5 UTP has an attenuation characteristic similar to
Belden 8281 coaxial cable but scaled in length: 120 meters
of Category 5 UTP is roughly equivalent to 300 meters of
Belden 8281 cable. When properly implemented, the
CLC014 will equalize data rates up to 625 Mbps over Cat-
egory 5 UTP. The maximum data rate depends upon the
cable length. A plot of Maximum Data Rate vs Cable Length
is found in the Typical Performance Characteristics sec-
tion for Belden 8281, and can be scaled as stated above to
estimate maximum cable lengths and data rates for UTP.
FIGURE 12. Video Routing Block Diagram
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