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LC7456A - U.S. Closed Caption Signal Extraction

Features

  • Low power consumption due to CMOS process.
  • Accurate caption signal extraction using a built-in pead hold circuit and digital technology.
  • Power Requirement : 5V ± 10 %.
  • Package : DIP16 Any and all SANYO products described or contained herein do not have specifications that can handle.

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Full PDF Text Transcription

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Ordering number : ENN*6733 LC7456A CMOS IC LC7456A U.S. Closed Caption Signal Extraction IC Preliminary Overview The LC7456A receives the composite video signal from the V / C (Video Chroma) signal processor and extracts the closed caption data. This data and a clock signal, generated by an on-chip PLL, are then sent to the decoder IC. The LC7456A is a CMOS version of the LA7945 IC also currently in production. The differences between the LA7945 and the LC7456A are a change from Bipolar to CMOS technology, a smaller package size (22 pins to 16 pins), and a reduction in the external circuitry requierd. An LC8640XX series microcontroller is needed to perform the decoding after the LC7456A has extracted the caption data from the composite video signal.
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