www.fairchildsemi.com features 7.6mhz 5th order y,c ?ters with composite summer 14db notch at 4.425mhz to 4.6mhz for sound trap capable of handling stereo 50db stopband attenuation at 27mhz on y, c and cv outputs better than 0.5db ?tness to 4.2mhz on y, c and cv outputs equalizer and notch ?ter for driving rf modulator with group delay of -180ns no external frequency selection components or clocks < 5ns group delay on y, c and cv outputs ac coupled inputs ac or dc coupled outputs capable of pal frequency for y,c,cv continuous time low pass filters < 1.4% differential gain with 0.7?differential phase on y, c and cv channels integrated dc restore circuitry with low tilt applications cable set top boxes satellite set top boxes dvd players description the fms6406 is a dual y/c 5th order butterworth lowpass video ?ter optimized for minimum overshoot and ?t group delay. the device also contains a summing circuit to generate ?tered composite video, an audio trap and group delay com- pensation circuit. the audio trap removes video information in the spectral location of the subsequent rf audio carrier. the group delay circuit predistorts the signal to compensate for the inherent receiver if ?ter s group delay distortion. in a typical application, the y and c input signals from dacs are ac coupled into the ?ters. both channels have dc restore circuitry to clamp the dc input levels during video sync. the y and c channels use separate feedback clamps. the clamp pulse is derived from the y channel. all outputs are capable of driving 2vpp, ac or dc coupled, into either a single or dual video load. a single video load consists of a series 75 ? impedance matching resistor con- nected to a terminated 75 ? line, this presents a total of 150 ? of loading to the part. a dual load would be two of these in parallel which would present a total of 75 ? to the part. the gain of the y, c and cv signals is 6db with 1vpp input levels. all video channels are clamped during sync to establish the appropriate output voltage reference levels. fms6406 precision s-video filter with summed composite output, sound trap, and group delay compensation ordering information temperature range for all parts: 0? to +70?. contact your local fairchild semiconductor distributor for additional product information model part number lead free package container pack qty fms6406 fms6406cs_nl soic-8 tube 95 fms6406 fms6406csx_nl soic-8 tape and reel 2500 august 2004 ?2004 fairchild semiconductor corporation disclaimer fairchild semiconductor reserves the right to make changes without further notices to any products herein to improve reliabilit y, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described h erein; neither does it convey any license under its patent rights, nor the rights of others. life support policy fairchild? products are not authorized for use as critical components in life support devices or systems without the express w ritten approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to per form when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a signi?ant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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