AD633JRZ is a 4-quadrant analog multiplier from Analog Devices. It features a 1 MHz bandwidth, 20 V/µs slew rate, and operates from ±8V to ±18V supplies.
The MPY634KU is a wide bandwidth, high accuracy, four-quadrant analog multiplier from Texas Instruments. It features a 10MHz typical bandwidth and ±0.5% maximum accuracy.