The ISL59446 is a triple channel 4:1 multiplexer featuring integrated amplifiers with a fixed gain of 2, high slew-rate and excellent bandwidth for video switching. The device features a three-state output (HIZ), which allows the outputs of multiple devices to be tied together. A power-down mode (ENABLE) is included to turn off un-needed circuitry in power sensitive applications. When the ENABLE pin is pulled high, the part enters a power-down mode and consumes just 14mW. ISL59446EVAL1 Evaluation Board User’s Guide Application Note May 8, 2005 AN1252.0 Introduction High Frequency Layout Considerations The ISL59446EVAL1 evaluation board contains all the At frequencies of 500MHz and higher, circuit board layout circuitry needed to characterize critical performance may limit performance. The following layout guidelines are parameters of the ISL59446 500MHz triple 4:1 implemented on the evaluation board: MUX-amplifiers over a var……