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FMS6408MTC146 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FMS6408MTC146 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 9 page  REV. 2C August 31, 2004 www.fairchildsemi.com Features • 7.6MHz 5th order RGB/YUV/YC CV filters • 50dB stopband attenuation at 27MHz on all outputs • Better than 0.5dB flatness to 4.2MHz on all outputs • No external frequency selection components or clocks • AC coupled inputs and AC or DC coupled outputs • Supports both NTSC and PAL luminance bandwidth • Continuous time low pass filters for video anti-aliasing or reconstruction applications • <1% differential gain with 0.5° differential phase on all channels • Integrated DC restore circuitry with low tilt Applications • Cable set top boxes • Satellite set top boxes • Terrestrial set top boxes • DVD players • Personal Video Recorders (PVR) • Video On Demand (VOD) Description The FMS6408 provides three video signal paths including a two-input mux, a video filter and a 6dB gain output driver. The filter bandwidth supports RGB and YUV signals in either NTSC or PAL formats. The video filters approximate a 5th order Butterworth low pass characteristic optimized for minimum overshoot and flat group delay to provide excellent image quality. Four different peaking options are available. The video filters can be bypassed if desired. In a typical application, the RGB or YUV DAC outputs are AC coupled into the filters through the input mux. All channels have DC restore circuitry to clamp the DC input levels during video sync. The clamp pulse derived from the selected Y input controls three independent feedback clamps. All outputs are capable of driving 2Vpp, AC or DC coupled, into either a single (150 Ω) or dual (75Ω) video load. The FMS6408 clamp levels can be factory programmed for YUV /RGB (250mV for all channels), YC / YPbPr (250mV on channel 1 and 1.125V on channels 2 and 3) or YC CV (250mV on channels 1 and 3 and 1.125V on channel 2). FMS6408 Triple Video Filter Driver for RGB and YUV Signals Functional Block Diagram 8MHz* Sync Processing 6d B gM 250mV YOUT YINA YINB 6d B gM UOUT UINA UINB 6d B gM 250mV or 1.125V * VOUT VINA VINB BYPASS (BYPASS/FILTER) INMUX (A/B) * Factory Selected Clamp and Peaking Levels 250mV or 1.125V * 8MHz* 8MHz* |
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