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Description

The AT76C001 Programmable Finite Impulse Response (FIR) Filter implements a 4th order FIR cell built around 4 multiplier-accumulators. It contains a dual-port RAM and a RAM which are used to implement FIR filters of up to 256 taps. High order filters are achieved by multiplexing the 4th order cell and accumulating the intermediate results up to 40 bits, so that there is no loss of accuracy.

Features

? 4 Multiplier-Accumulators

? 40 Bits Accuracy

? 16 Bit Data and Coefficients

? 4-tap Filter With 27 MHz Sample Rate

? Programmable to Give up to 256 Taps With Sampling Reducing Proportionally to 421,875 kHz

? Programmable Rounding and Truncation to 16 Bit

? 8 Bit Standard Microprocessor Interface

? 64-pin PQFP, 68-pin PGA68 or 68-pin LCC68 Packaging

Applications

? Digital Filters (video, audio, etc.)

? Correlation

? Image Processing