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This literature is subject to all applicable copyright laws and is not for resale in any manner.FMS6406 Precision S-Video Filter with Summed Composite Output, Sound Trap, and Group Delay Compensation August 2006 FMS6406 Precision S-Video Filter with Summed Composite Output, Sound Trap, and Group Delay Compensation Features Description 7.6MHz 5th-order Y,C filters with composite summer The FMS6406 is a dual Y/C 5th-order Butterworth lowpass 14dB notch at 4.425MHz to 4.6MHz for sound trap video filter optimized for minimum overshoot and flat capable of handling stereo group delay. The device also contains a summing circuit 50dB stopband attenuation at 27MHz on Y, C, to generate filtered composite video, an audio trap and and CV outputs group delay compensation circuit. The audio trap removes Better than 0.5dB flatness to 4.2MHz on Y, C, video information in the spectral location of the subsequent and CV outputs RF audio carrier. The group delay circuit predistorts the Equalizer and notch filter for driving RF modulator with signal to compensate for the inherent receiver IF filters group delay of -180ns group delay distortion. No external frequency selection components or clocks In a typical application, the Y and C input signals from < 5ns group delay on Y, C, and CV outputs DACs are AC-coupled into the filters. Both channels have AC coupled inputs DC-restore circuitry to clamp the DC-input levels during AC or DC coupled outputs video sync. The Y and C channels use separate feedback Capable of PAL frequency for Y, C, CV clamps. The clamp pulse is derived from the Y channel. Continuous Time Low Pass Filters All outputs are capable of driving 2V , AC or DC-coupled, pp <1.4% differential gain with 0.7 differential phase into either a single or dual video load. A single video load on Y, C, and CV channels consists of a series 75 W impedance matching resistor Integrated DC restore circuitry with low tilt connected to a terminated 75W line, this presents a total of 150 W of loading to the part. A dual load would be two of Applications these in parallel which would present a total of 75 W to the Cable set-top boxes part. The gain of the Y, C and CV signals is 6dB with 1V pp Satellite set-top boxes input levels. All video channels are clamped during sync DVD players to establish the appropriate output voltage reference levels. Block Diagram VCC 7 Sync Strip Reference and Timing Y 1 6dB 8 Y IN OUT gM + 250mV 6 CV OUT + Notch 2 EQ NOTCH Group gM Delay 250mV C 4 6dB 5 C IN OUT 3 GND Ordering Information Operating Temp Packaging Part Number Package Pb-Free Range Method SOIC-8 Yes 0C to +70C Tube FMS6406CS FMS6406CSX SOIC-8 Yes 0C to +70C Tape and Reel 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6406 Rev. 4.0.4