It can perform either crosscorrelation
or: autocorrelation <x(t)*x(t-nT)> of the digitized signals.
The products are averaged in 16-bit accumulators, which may overflow after 2 or 34 milliseconds. Their contents are readable in parallel thru 16 tri-state pins. A complete chip documentation may be downloaded under Word 6.0 format (293 Ko).
The chip has been designed as a gate array under NEC QB-8 technology. Its main characteristics are low dissipation and consumers market price.