MC44CC375AV

Freescale Semiconductor Document Number: MC44CC375AV Rev 1, 11/2008 PLL Tuned VHF (Channel 3 / 4) Audio / Video Modulator MC44CC375AV The MC44CC375 CMOS RF modulator is the latest generation of the legacy MC44BC375 products. www.datasheet4u.com The MC44CC375AV is an audio/video RF modulator for use in VCRs, set-top PLL TUNED VHF boxes, and similar devices. It is designed for applications requiring US broad(CHANNEL 3/4) cast, channel 3 or channel 4, RF outputs. AUDIO/VIDEO MODULATOR A programmable Phase-Locked Loop (PLL) tunes the modulator, and the desired channel 3 or 4 frequency is selected using the external package pin, Channel Selection (CHS). No external tank circuit components are required, reducing the sensitivity of the PCB design and the need for external adjustments. The PLL obtains its reference from a 4.0 MHz crystal oscillator. The sound oscillator can be turned ON and OFF by the external package pin Sound Oscillator Control (SOC). A fixed Picture to Sound ratio of 12 dB and 4.5 MHz sound subcarrier are used for MC44CC375AV. A low-power standby mode is selectable via the pin, Power Save (PSAVE), which turns off all internal VCOs and mixers. Also included in this new generation CMOS RF modulator is the Sound AuxilEF SUFFIX iary Input, pin AUX, which bypasses the sound FM modulator. This direct sound SOIC 16 PACKAGE RF modulator has found more and more applications in BTSC stereo systems. CASE 751B-05 U.S. broadcast frequency for Channel 3 or 4 operation is ...