A triple-channel multiplexer for video switching from Intersil has been designed for driving drives video loads, and double or back-terminated loads. The ISL59448 is a triple-channel 2:1 multiplexer with an integrated gain-of-2 buffer that delivers 1600V/us slew rate and 500MHz bandwidth. The device is designed to meet the high-resolution requirements of monitors, projectors and KVM (keyboard, video, mouse) peripherals. It extends Intersil’s family of video multiplexers, which includes the ISL59445 with its 1GHz bandwidth capability. The ISL59448 allows designers to switch between two different input signals, each comprised of three channels, such as RGB (red, green, blue) or YPbPr (the colour space used in video electronics).

The integrated buffer with a fixed gain of two is ideal for driving double terminated video loads. The chip also features a three-state output (HIZ), so users can connect the outputs of multiple devices together to form large matrices. Also, a power-down mode that reduces power to 14mW is incorporated, so unneeded circuitry can be turned off in power-sensitive applications. Other key features of the device are a 12ns switching time, a differential gain/phase error of 0.05 percent/0.05 degrees, and a supply current of 16mA/channel. The device is available now in 24-lead QSOP packages.