The is a classic balanced modulator/demodulator integrated circuit, widely used in analog communication systems. From building amplitude modulation (AM) transmitters to designing frequency mixers and product detectors, this IC remains a staple in RF and analog electronics labs.
For a ready-to-use library, you can find the MC1496 symbol and footprint through the following sources: mc1496 proteus library download
There isn't one "official" download, but several reputable community sources provide the necessary files: mc1496 proteus library download