The AD835AN is a complete four quadrant voltage output analog multiplier. It generates a linear product of its X and Y voltage inputs with a -3dB output bandwidth of 250 Mhz. With fully differential X and Y inputs and packaged in an 8 PIN DIP configuration. These are new un-used parts in their original tube. Buy all 25 Pcs. for $15.00 each for a total of $375.00. Call for smaller quantities 800-235-6960.