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MAX9500, MAX9501

Triple-Channel HDTV Filters

-50dB Attenuation at 44.25MHz Filter for Complete HD Image Suppression without External Components
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This product is Not Recommended for New Designs. Some versions may be No Longer Available or being discontinued and subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for details.


The MAX9500/MAX9501 are fully integrated solutions for filtering and buffering HDTV signals. The MAX9500 operates from a single +5V supply, while the MAX9501 operates from dual ±5V supplies. The MAX9500/MAX9501 triple-channel video reconstruction filters are both gain and delay matched and are ideal for use in set-top boxes, DVD players, and other equipment that generate analog HDTV outputs.

The MAX9500/MAX9501 interface between the current-output, digital-to-analog converters (DAC) of an Advanced Television Standard Committee (ATSC), Motion Picture Experts Group (MPEG) decoder and the external connections of a television, set-top box, or DVD player.

The MAX9500/MAX9501 feature a DC-coupled input with very low input capacitance and high resistance. The highly selective lowpass filters remove spectral replicas at the output of the DAC. The output amplifier has +6dB of gain to drive 75Ω back-terminated loads to unity gain. The DC-coupled input eliminates problems such as sync crush, droop, and field tilt. The output load can be DC- or AC-coupled, depending on the application.

All three channels in the MAX9500/MAX9501 have the same frequency response with matched group delay and gain. The MAX9500/MAX9501 filter response meets the requirements of the EIA-770.3/SMPTE 274M filter template achieving > 40dB attenuation at 44.25MHz. The MAX9500/MAX9501 can also be used as an antialiasing filter for HDTV component inputs.

The MAX9500/MAX9501 are available in compact 16-pin QSOP packages and are fully specified over the -40°C to +85°C extended temperature range.

Data Sheet

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Key Features

  • 30MHz Bandwidth at ±1.5dB
  • Extremely Sharp Rolloff, Lowpass Filters -50dB at 44.25MHz
  • DC-Coupled Inputs; AC- or DC-Coupled Outputs
  • ±5V Dual Supply (MAX9501)
  • 5V Single Supply (MAX9500)
  • Matched Group Delay and Gain
  • Drive Single/Double Back-Terminated Loads (150Ω/75Ω) Directly to Ground
  • Sink and Source Output Current
  • High Input Impedance to Interface to Low Output-Current DAC
  • 16-Pin QSOP Package


  • A/V Receivers
  • Cable and Satellite Set-Top Box Receivers
  • Digital Displays
  • DVD Players
  • HDTV Sets
  • Home Theater Systems
  • Video Projectors


MAX9500, MAX9501: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release   2005-12-06 ]

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Document Ref.: 19-3779 Rev 4; 2007-01-18
This page last modified: 2007-11-16