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MC44BC374CDR2 Datasheet(PDF) 3 Page - Freescale Semiconductor, Inc |
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MC44BC374CDR2 Datasheet(HTML) 3 Page - Freescale Semiconductor, Inc |
3 / 30 page Device Overview MC44BC373C/374C Technical Data 2 Device Overview Figure 2 shows a simplified block diagram of the MC44BC373C/4C device. The MC44BC373C/4C device has three main sections: 1. A high speed I2C-compatible bus section 2. A PLL section to synthesize the UHF/VHF output channel frequency (from an integrated UHF oscillator, divided for VHF output) 3. A modulator section, which accepts audio and video inputs, then uses them to modulate the UHF/VHF carrier An on-chip video test pattern generator with an audio test signal is included. The MC44BC373C operates as a multi-standard modulator and can handle the following systems using the same external circuit components: B /G, I, D /K, L, M/ N. High frequency BiCMOS technology allows integration of the UHF tank circuit and certain filtering functions. Figure 2. MC44BC373C/4C Simplified Block Diagram 8 13 1 2 6 11 14 9 4 12 7 3 10 15 16 TVOVCC TVOUT LOP VIDEO SPLLFLT AUDIO VCCA GND PREEM XTAL PLLFLT GNDD VCCD SCL SDA BUS SECTION VCO and PLL SECTION MODULATOR SECTION Clamp Peak White L/BG 31.25 31.25KHz 4MHz XCO Ref Divider /128 Phase Comp PLL Prog Divider Prescaler /8 VHF Dividers Video Modulator LPF LPF Sound Modulator L/BG FM AM ALC LPF Prog Divider AM Modulator Audio Amplifier Sound Oscillator and FM Modulator Sound PFD kHz High Speed I2CBus Receiver UHF OSC I2CBUS I2CBUS 75 Ω 5 GND Clip Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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