Low Power NTSC/PAL/SECAM Video Decoder with Differential CVBS Inputs

Key Features

  • Video Decoder
  • NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination), PAL (60), SECAM support with automatic format detection
  • Software selectable analog input control allows for combinations of single ended CVBS, differential CVBS, and S-Video
  • Built-in analog anti-alias filter
  • Two 10-bit ADCs and analog clamping circuit
  • Fully programmable static gain or automatic gain control for the Y channel
  • Programmable white peak control for the Y channel
  • 4-H adaptive comb filter Y/C separation
  • PAL delay line for color phase error correction
  • Image enhancement with peaking and CTI.
  • Digital sub-carrier PLL for accurate color decoding
  • Digital Horizontal PLL for synchronization processing and pixel sampling
  • Advanced synchronization processing and sync detection for handling non-standard and weak signal
  • Programmable hue, brightness, saturation, contrast, and sharpness.
  • Automatic color control and color killer
  • Chroma IF compensation
  • VBI slicer supporting industrial standard data services
  • VBI data pass through, raw ADC data output
  • Programmable output cropping

Digital Output

  • ITU-R 601 or ITU-R 656 compatible YCbCr (4:2:2) output format

Video Decoder


The TW9990 is a low power NTSC/PAL/SECAM video decoder chip that is designed for automotive applications. It supports both single-ended and differential composite video as well as S-Video. Typical power consumption is 110mW for composite input applications, and the available power down mode further reduces power consumption. It uses 1.8V for both analog and digital supply voltage and 3.3V for I/O power. A single 27MHz crystal is all that is needed to decode all analog video standards.


For more detail: Low Power NTSC/PAL/SECAM Video Decoder with Differential CVBS Inputs

Current Project / Post can also be found using:

  • pal decoder diagram

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