The IRAM chip is a 64-channel, 100 MHz, 2-bit (4 level) correlator specially intended for radio astronomy applications.

It can perform either crosscorrelation   <x(t)*y(t-nT)>
                         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.