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MC44BC375U - PLL Tuned VHF (Channel 3 / 4)Audio / Video Modulator

General Description

Figure 1.

Table 1.

Key Features

  • Two RF output power levels offered:.
  • MC44BC375U has typical RFOUT power of 76 dBµV.
  • MC44BC375UA has typical RFOUT power of 80 dBµV U. S. broadcast frequency for Channel 3 or 4 operation is selected by CHS pin Programmable VHF oscillator and sound subcarrier oscillator. No external varicaps, diodes/inductors, or tuned components required. Programmable Picture/Sound Carrier Ratio (14 dB or 16 dB) is selected by PSS pin Programmable Sound Subcarrier Oscillator (4.5 or 5.5.

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Other Datasheets by Freescale Semiconductor (now NXP Semiconductors)

Part Number Description
MC44BC375UA PLL Tuned VHF (Channel 3 / 4)Audio / Video Modulator
MC44BC375J PLL Tuned VHF Audio/Video High Integration Modulator ICs
MC44BC375T PLL Tuned VHF Audio/Video High Integration Modulator ICs
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Freescale Semiconductor Data Sheet Document Number: MC44BC375U Rev 3, 8/2006 PLL Tuned VHF (Channel 3 / 4) 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 applications requiring National Television System Committee, NTSC, channel 3 or channel 4, RF outputs. The difference between the two modulators is the RF output power level. The nominal RFOUT level for the MC44BC375U is 76 dBµV (typical) and the RFOUT level for the MC44BC375UA is 80 dBµV (typical). A programmable Phase-Locked Loop (PLL) tunes the modulator, and the desired channel 3 or 4 frequency isselected using the external package pin, Channel Selection (CHS).