The ISL59421 is a 865MHz bandwidth multiplexing amplifier designed primarily for video switching. This Mux amp has user-settable gain and also features a high speed threestate function to enable the output of multiple devices to be wired together. All logic inputs have pull-downs to ground and may be left floating. The ENABLE pin, when pulled high, sets the ISL59421 to the low current power-down mode for power sensitive applications - consuming just 5mW. ISL59420/21EVAL1 Evaluation Board User’s Guide Application Note August 10, 2005 AN1187.1 Introduction High Frequency Layout Considerations The ISL59420/21EVAL1 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 ISL59420, ISL59421 sin……