mc44bc375u Freescale Semiconductor, Inc, mc44bc375u Datasheet
mc44bc375u
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mc44bc375u Summary of contents
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... Data Sheet PLL Tuned VHF (Channel Audio / Video Modulator The MC44BC375U and MC44BC375UA are audio/video RF modulators for use in VCRs, set-top boxes, and similar devices. They are designed for applica- tions requiring National Television System Committee, NTSC, channel 3 or chan- nel 4, RF outputs. The difference between the two modulators is the RF output power level. The nominal RF level for the MC44BC375U is 76 dBµ ...
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... CHS 2 PSS 3 LOP 4 XTAL 5 GND 6 PREEMP 7 AUDIO 8 SPLFLT 9 PSAVE/LO 10 VIDEO GND RFOV 15 PLLFLT 16 SFS MC44BC375U 2 PIN DESCRIPTIONS CHS 1 16 SFS PSS 2 15 PLLFLT TVOV 3 14 LOP XTAL 4 13 TVOUT GND 5 12 GND PREEM CCA 7 10 AUDIO VIDEO PSave/LO ...
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... The LOP output is switched between a “HI” and “LO” level with pin 9, Psave/LO (see MODULATOR SECTION 7 AUDIO IN Audio 6 PREEM Amplifier ALC GND Picture-Sound Select 2 — PSS Ref Divider 4 MHz ÷ 128 XCO 4 XTAL “Pin Selection” on “Pin Selection” on page 4). MC44BC375U 3 ...
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... The sound modulator system consists modulator incorporating the sound subcarrier oscillator. The audio input signal is AC coupled into the amplifier which then drives the modulator. MC44BC375U 4 The audio pre-emphasis circuit is a high-pass filter with an external capacitor C1 and an internal resistor (100 kΩ typi- cal). The recommended capacitor value (750 pF) is for M/N standards, time constant is 75 µ ...
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... Units +6 0 °C +150 °C +150 Typ max Units 500 — V 6000 — V 140 — °C/W Typ Max Units +5.0 +5 5.0 7.0 mA 6.0 8.0 mA µ µA 1.0 1.5 µA 100 150 — —- KΩ 2.1 —- V 210 300 mV µA — 1.0 °C — +85 MC44BC375U 5 ...
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... MC44BC375UA Using red EBU bar MC44BC375U MC44BC375UA Using red EBU bar MC44BC375U MC44BC375UA 2nd harmonic MC44BC375U MC44BC375UA 3rd harmonic: MC44BC375U MC44BC375UA 1/2∗Fo - 1/4∗Fo - MC44BC375U 3/2∗Fo - 3/4∗Fo MC44BC375UA No video sound modulation MC44BC375U MC44BC375UA MC44BC375U MC44BC375UA Table 9. (1) Test Conditions CVBS CVBS Table 9. “ ...
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... Audio S/N with Sync Buzz FM 1. See Performance Measurement Test Set-ups, Application Specific Products Freescale Semiconductor (1) Min Test Conditions -2.5 — 50 Table 9. Typ Max Unit Type 2.0 2 KΩ A — +2 0.3 1 — MC44BC375U 7 ...
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... Frequency Frequency 700 mVpkpk 100 kHz 100kHz 700mV pk-pk MC44BC375U 8 RF Inputs / Output into 75 Ω Load using Ω • transformation • Video Input 1.0 V pk-pk • Audio pre-emphasis circuit engaged Measurement Set-Up ...
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... The Video signal is demodulated on the spectrum analyzer, and the peak level of the 100 KHz signal is measured as a reference. The frequency is then swept from 100 KHz to 5.0 MHz, and then the difference in dBc from the 100 KHz reference level is measured. Sound Chroma carrier carrier +4.43 MHz +5.5 MHz 3rd harmonic 2Fo 3Fo . Fo*3/4 Fo Fo*3/2 MC44BC375U 9 ...
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... This is measured using a Demodulator in B/G using a CCIR Rec. 567 weighting network, 100 KHz to 5.0 MHz band with sound trap and envelope detection, and a Video Analyzer. MC44BC375U 10 Measurement Set-Up Weighted Video Signal to Noise The Video Analyzer measures the ratio between the amplitude of the active area of the video signal (700 mV) and the noise level in Vrms on a video black level which is shown below ...
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... KHz) after having measured the frequency. The output rms detector converts the residual noise + distortion to dc. The dc voltmeter measures both dc signals and calculates the ratio in% of the two signals. ( ADist = Distorsion + A(mV 6-10mV) B(mV) B (0.6 - 3mV) Sound carrier +5.5 MHz is supplied by the Audio Analyzer, rms ) ⁄ ( Noise Distorsion + Noise + Signal MC44BC375U ) 11 ...
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... VCC Pin 6: PREM 11.8k VCC 50k Pin 7: AUDIO IN MC44BC375U 12 Measurement Set-Up Audio Signal to Noise The Audio Analyzer alternately turns ON and OFF its internal audio source to make a measure of the Audio signal plus noise and then another measure of only the noise. The measurement is made using the internal CCIR468-2 Filter of the Audio Analyzer together with the internal 30+/-2 ...
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... Figure 4. Application Specific Products Freescale Semiconductor APPLICATION SCHEMATIC MC44BC375U/UA Application Schematic MC44BC375U 13 ...
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... MC44BC375U 14 PACKAGE DIMENSIONS Figure 5. SOIC16 Package Dimensions Application Specific Products Freescale Semiconductor ...
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... Application Specific Products Freescale Semiconductor Figure 6. SOIC16 Package Dimensions - part 2 MC44BC375U 15 ...
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... For further information, see http:/www.freescale.com or contact your Freescale sales representative. For information on Freescale’s Environmental Products program http://www.freescale.com/epp. Document Number: MC44BC375U Rev. 3 08/2006 Information in this document is provided solely to enable system and software implementers to use Freescale Semiconductor products ...