The HSP43891 is a video-speed Digital Filter (DF) designed to efficiently implement vector operations such as FIR digital filters. It is comprised of eight filter cells cascaded internally and a shift and add output stage, all in a single integrated circuit. Each filter cell contains a 9x9 two’s complement multiplier, three decimation registers and a 26-bit accumulator. The output stage contains an additional 26-bit accumulator which can add the contents of any filter cell accumulator to the output stage accumulator shifted right by 8-bits. The HSP43891 has a maximum sample rate of 30MHz. The effective multiply-accumulate (mac) rate is 240MHz.

Features
• Eight Filter Cells
• 0MHz to 30MHz Sample Rate
• 9-Bit Coefficients and Signal Data
• 26-Bit Accumulator per Stage
• Filter Lengths Over 1000 Taps
• Expandable Coefficient Size, Data Size and Filter Length
• Decimation by 2, 3 or 4

Applications
• 1-D and 2-D FIR Filters
• Radar/Sonar
• Digital Video
• Adaptive Filters
• Echo Cancellation
• Complex Multiply-Add
    - Sample Rate Converters