The MIC1700 is a complete reconstruction filter solution for high definition set-top boxes.

The device has two independent component inputs (YPrPb or RGB) selectable via a 2-to-1 multiplexer, and a separate S-video input (Y/C). Component channel filters have a selectable cutoff frequency ( 8MHz or 36MHz) to support both standard (SD) and high definition (HD) applications. S-video filters have fixed cutoff (8MHz) to support legacy composite applications. In addition, S-video channels are summed to provide a filtered CV output for an RF modulator or VCR. All inputs are DC coupled with a 0V to 1V peak-to-peak range. All outputs are designed to drive 2V peak-to-peak into AC-coupled 150 Ohm loads. This supports 1V peak-to-peak into a 75 load with a 75 Ohm series source terminator.

Filters have 6th order near butterworth characteristics with cutoffs of 8MHz (SD and CV) and 36MHz (HD). These characteristics are chosen to provide good passband flatness with sufficient stop band attenuation and minimal group delay distortion.

The device operates from a 5VDC supply.

Data sheets and support documentation are available at Micrel’s web site, www.micrel.com.

• S-video (Y/C) input, S-video and summed (CV) output
• 2 YPrPb or RGB inputs, YPrPb or RGB output
• YPrPb/RGB 2-1 input multiplexer
• DC coupled inputs – AC-coupled output drive
• 6db output gain for 75 Ohm source termination
• Component filters selectable for SD or HD cutoffs
• 6th order Butterworth characteristic
• Flat passband (HD 0.5dB @ 30MHz typ)
• Low group delay distortion (HD: 12ns @ 30MHz typ)
• Single 5V supply
• 28-pin wide body SOIC package (with exposed pad for improved thermal performance)

• HDTV
• HDTV set-top boxes
• Video games
• HDTV systems
• DVD players
• Digital satellite set-top boxes
• HDTV monitors