The CA3046 is a matched transistor array. It’s ideal for building Moog ladder filters. One example is the Frequency Central Raging Bull, which is based on the Moog Taurus Mk1. You can find the schematics here.
Obsolete! Replaced by the AS3046
Sorry, we no longer stock this chip, and it is no longer produced. Instead we have the pin-compatible Alfa AS3046, which is a modern-production clone and will serve as a replacement in any circuits that use the CA3046.