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STV2248C Datasheet(PDF) 31 Page - STMicroelectronics |
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STV2248C Datasheet(HTML) 31 Page - STMicroelectronics |
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31 / 76 page  STV223XD/224XC - ELECTRICAL CHARACTERISTICS 31/76 4.7 FILTERS Y TRAP FILTER CHROMINANCE BANDPASS CLOCHE FILTER 4.8 CHROMA PART Symbol Parameter Test Conditions Min. Typ Max. Unit fTRAP-PN Notch Frequency PAL/NTSC fOSC MHz fTRAP-S Notch Frequencies SECAM fnb SECAM fnr 4.2 4.5 MHz fTRAP-ACC Notch Frequency Accuracy 3.5 % QTRAP Trap Quality Factor Q = 1/ (f0/f-3dB - f-3dB/f0), Peaking Min. 1.5 - CrejPN Color Subcarrier Rejection PAL/NTSC 20 dB CrejS Color Rejection in SECAM Mode From 4.1 to 4.6 MHz At 3.9 MHz 10 20 dB Symbol Parameter Test Conditions Min. Typ Max. Unit fBP Center Frequency Register 12h, d3-d0 = 0000 -5% fOSC +5% MHz QBP Bandpass Quality Factor 2.8 3.5 4.2 - Symbol Parameter Test Conditions Min. Typ Max. Unit fCLOCHE Center Frequency Register 11h, d4-d0 = 00000 4.27 4.29 4.31 MHz QBP Cloche Quality Factor 14 16 18 - ACC Symbol Parameter Test Conditions Min. Typ Max. Unit GACC ACC Control Range Change of burst overall ACC control range < 2dB 26 dB VMin. Minimum Burst Signal Amplitude Within the ACC control range 0.03 VPP ACC OVERLOAD Symbol Parameter Test Conditions Min. Typ Max. Unit VTH Chroma regulation Threshold ACC overload ON, PAL/NTSC 3 dB KILLER Symbol Parameter Test Conditions Min. Typ Max. Unit Ident-kill Color on Threshold of ident. circuit Burst amplitude on selected CVBS input 5 mVPP Kill-Hyst Color off Killer Hysteresis Strong signal condition, S/N > 40 dB 2 mVPP CHROMA PLL Symbol Parameter Test Conditions Min. Typ Max. Unit CaptR Catching Range With recommended crystal and rec- ommended CLPF filter value. ±300 HoldR Holding Range > or = to capture range |
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