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This literature is subject to all applicable copyright laws and is not for resale in any manner.FMS6404 Precision Composite Video Output with Sound Trap and Group Delay Compensation October 2011 FMS6404 Precision Composite Video Output with Sound Trap and Group Delay Compensation Description Features The FMS6404 is a single composite video 5th-order 7.6MHz 5th-Order Composite Video Filter Butterworth low-pass video filter optimized for minimum 14dB Notch at 4.425MHz to 4.6MHz for Sound Trap overshoot and flat group delay. The device contains an audio trap that removes video information in a spectral Capable of Handling Stereo location of the subsequent RF audio carrier. The group 50dB Stopband Attenuation at 27MHz on delay compensation circuit pre-distorts the signal to CV Output compensate for the inherent receiver intermediate > 0.5dB Flatness to 4.2MHz on CV Output frequency (IF) filters group delay distortion. Equalizer and Notch Filter for Driving RF Modulator In a typical application, the composite video from the with Group Delay of -180ns DAC is AC coupled into the filter. The CV input has DC- restore circuitry to clamp the DC input levels during No External Frequency Selection Components video synchronization. The clamp pulse is derived from or Clocks the CV channel. < 5ns Group Delay on CV Output All outputs are capable of driving 2V , AC- or DC- PP AC-Coupled Input coupled, into either a single or dual video load. A single video load consists of a series 75 impedance AC- or DC-Coupled Output matching resistor connected to a terminated 75 line. Capable of PAL Frequency for CV This presents a total of 150 of loading to the part. A dual load would be two of these in parallel, which Continuous Time Low-Pass Filters presents a total of 75 to the part. The gain of the CV signal is 6dB with 1V input levels. All video channels <1.4% Differential Gain with 0.7 Differential Phase PP on CV Channel are clamped during synchronization to establish the appropriate output voltage reference levels. Integrated DC Restore Circuitry with Low Tilt Related Resources Applications AN-6024 FMS6xxx Product Series Understanding Cable Set-Top Boxes Analog Video Signal Clamps, Bias, DC Restore, and AC or DC coupling Methods Satellite Set-Top Boxes DVD Players AN-6041 PCB Layout Considerations for Video Filter / Drivers Ordering Information Operating Part Number Package Packing Method Temperature Range 8-Lead, Small-Outline Integrated Circuit (SOIC), 2500 Units FMS6404CSX -40C to +70C JEDEC MS-012, .150 Narrow Body per Reel 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6404 Rev. 1.0.0