CS3310-CK stereo digital volume control by Crystal Semiconductor (Now Cirrus Logic) Package: 16-DIP Download Crystal Semiconductor CS3310-CK datasheet : Status: NOS (New Old Stock) genuine Crystal Semiconductor stock, still in original tubes, much sought after chip for use in high end audio gear. Selling on UK ebay at £16-09 each.... but just £5.00 from us ! RoHS compliant: no