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Video Decoder and ADC ICs
  AL240 Low Power Adaptive Comb Filter Video Decoder (EOL)
Functional Description

The AL240 is silicon efficient, cost effective high video quality NTSC/PAL SECAM video decoder with high quality Y/C separation process. The AL240 decodes NTSC/PAL/SECAM composite video or S-video and convert it into YCbCr 4:2:2, 8-bit digital video output. Employing adaptive filter technology, the AL240 is able to provide a clear Y/C separated signals while maintaining excellent frequency response. The result is sharp, high detail video that eliminates unwanted dot crawl and false color effects. Fully programmable video characteristic controls, such as hue, contrast, brightness, saturation, are supported. The AL240 decoder incorporates an advanced vertical blanking interval (VBI) data processor to do data slicing, parsing and decoding teletext, closed caption, and other formats. Two wires of hardware channel switching inputs allow decoder to do an instant alternation of analog CVBS inputs from one to the other. Up to 4 serial bus addresses can be selected via two configuration pins that allow multiple AL240 chips on the design without extra logic.

The AL240 supports power saving mode and operates under the low power voltages (3.3V and 1.8V) in 44-pin Lead Free (PBF) QFP package.
Additional Information
AL240 Brochure
Reference Kit:
AL240C-EVB-A1  (Reference Kit - Adaptive Comb Filter Video Decoder EVB)
Replacement Chip:
AL244C-LF2-PBF  (4-in-1 Comb-Filter Video Decoder)



  • Decodes NTSC, PAL and SECAM composite video or S-video
  • Supports all variation of the NTSC and PAL standard - I, B, G, H, D, N, M, combination N
  • Standard 8-bit ITU 656 along with separate sync signals YCbCr 4:2:2 format output
  • Excellent quality Y/C separation - minimizes cross luma and cross color effects
  • Auto detects and locks VCR trick modes
  • Decodes weak and noisy off-air signals
  • Fast lock on channel switching, etc.


  • Video Surveillance Systems
  • Mobile System
  • Handheld Application
  • Video Capture Devices
  • Video Phone
  • Networking Video, etc.
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