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CLC014 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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CLC014 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 18 page  CLC014 Adaptive Cable Equalizer for High-Speed Data Recovery General Description National’s CLC014 adaptive cable equalizer is a low-cost monolithic solution for equalizing data transmitted over cable (or any media with similar dispersive loss characteristics). The CLC014 simplifies the task of high-speed data recovery with a one-chip solution and a minimal number of external components. The equalizer automatically adapts to equalize any cable length from zero meters to lengths that attenuate the signal by 40 dB at 200 MHz. This corresponds to 300 meters of Belden 8281 or 120 meters of Category 5 UTP (unshielded twisted pair). The CLC014 provides superior jitter performance: 180ps pp for 270 Mbps data that has passed through 200 meters of Belden 8281 cable. This exceptional perfor- mance provides wide error margin in digital data links. The equalizer operates on a single supply with a power con- sumption of only 290 mW. The small 14-pin SOIC package allows for high-density placement of components for multi- channel applications such as routers. The equalizer oper- ates over a wide range of data rates from less than 50 Mbps to rates in excess of 650 Mbps. The equalizer is flexible in allowing either single-ended or differential input drive. Its high common mode rejection pro- vides excellent immunity to interference from noise sources. On-chip quantized feedback eliminates baseline wander. Additional features include a carrier detect output and an output mute pin which, when tied together, mute the output when no signal is present. A buffered eye monitor output is provided, for viewing the equalized signal prior to the com- parator. Differential AEC pins allow the user to set the inter- nal adaptive loop time constant with one external capacitor. Also, the CLC014 is insensitive to the pathological patterns inherent in the video industry standards. Features n Automatic equalization of coaxial and twisted pair cables n Carrier detection and output mute n Output eye monitor n Single supply operation: +5V or −5.2V n Single-ended or differential input n Low cost Applications n SMPTE 259M serial digital interfaces: NTSC/PAL, 4:2:2 component and wide screen; also 540 Mbps (4:4:4:4) n Serial digital video routing and distribution n Serial digital data equalization and reception n Data recovery equalization: ATM, CAD networks, medical, set top terminals, industrial video networks Key Specifications n Low jitter: 180pspp @ 270 Mbps through 200 meters of Belden 8281 coaxial cable n High data rates: < 50 Mbps to > 650 Mbps n Excellent input return loss: 19 dB @ 270 MHz n Low supply current: 58 mA n Equalizes up to 300+ meters of Belden 8281 or 120 meters of Cat 5 UTP cable Typical Application DS100056-4 June 1998 © 1999 National Semiconductor Corporation DS100056 www.national.com |
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