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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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MC44BC373C bảng dữ liệu(PDF) 9 Page - Freescale Semiconductor, Inc |
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MC44BC373C bảng dữ liệu(HTML) 9 Page - Freescale Semiconductor, Inc |
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9 / 30 page  Modulator High Frequency Characteristics MC44BC373C/374C Technical Data 9 Modulator High Frequency Characteristics Unless otherwise stated: Vcc=5.0V, Ambient Temperture=25 o C, Video Input 1V p-p, 10-step grayscale. RF inputs/outputs into 75Ohm load. SPECIFICATIONS ONLY VALID FOR ENVELOPE DEMODULATION. Figure 3. Typical Performance Parameter Test Conditions Min Typ Max Unit Type TVOUT output level Output signal from modulator section See Figure 3. See Note 2 73 74.5 77 dB µVB UHF oscillator frequency 460 — 880 MHz A VHF range From UHF oscillator internally divided 45 — 460 MHz B TVOUT output attenuation During transient output inhibit, or when ATT bit is set to 1. See Figure 3. SeeNote2 50 60 — dBc B Sound subcarrier harmonics (Fp +n∗Fs) Reference picture carrier. See Note 2 — 63 58 dBc C Second harmonic of chroma subcarrier Using red EBU bar. See Note 2 — — 65 dBc C Chroma/Sound intermodulation: Fp + (Fsnd – Fchr) Using red EBU bar.See Note 2 — — 65 dBc C Fo (picture carrier) harmonics 2nd harmonic: CH21 3rd harmonic: CH21 Other channels: See Figure 3. See NOTE 1. See Note 2 — — 35 26 30 22 dBc C Out band (picture carrier) spurious 1/2 ∗Fo–1/4∗Fo–3/2∗Fo–3/4∗Fo From 40MHz to 1GHz. See Note 2 —0 10 dB µVC In band spurious (Fo ± 5MHz) No video sound modulation.See Note 2 — — 60 dBc C Note: 1: Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors. Note: 2: See “Characterization Measurement Conditions” on page 12. TV Outp ut Le v e l 72 73 74 75 76 77 78 47 1 52 1 5 71 621 67 1 72 1 7 71 821 871 Fr e que nc y (M hz ) T V Ou tp u t A t te n u a t io n 45 50 55 60 65 70 75 471 521 571 621 671 721 771 821 871 Fr e q u e n c y ( M h z ) 3Fo Har m o n ics 15 20 25 30 35 40 45 47 1 521 571 621 671 721 771 821 871 Fr e que nc y ( M h z ) 2Fo Har m o n ics 15 20 25 30 35 40 47 1 521 571 621 671 721 771 821 871 Fr e que ncy ( M h z) Typical Maximum specification Typical Typical Typical Minimum specification Maximum specification Maximum specification Maximum specification Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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