The ISL59445IRZ-EVAL evaluation board contains all the circuitry needed to characterize critical performance parameters of the ISL59445 1GHz bandwidth multiplexing amplifier designed primarily for video input switching.

The evaluation board circuit and layout is optimized for either 50Ω or 75Ω terminations, and implements a basic RG-B video 2 input MUX amp. The board is supplied with 75Ω input signal terminations and a 75Ω back-termination resistor on each of the three outputs, making it suitable for driving video cable. The user has the option of replacing the 75Ω resistors with 50Ω resistors for other applications. The control lines contain 50Ω resistors to match the 50Ω output impedance of high-speed pulse generators. Control line termination resistors are recommended for rise and fall times under 10ns to minimize unwanted transients. If DC is used for the control logic, the resistors may be removed; or the applied DC voltage can be reduced to 2.5V to reduce the dissipation in the termination resistor.


  • Triple 4:1 multiplexers for RGB
  • Internally set gain of 1
  • High-speed three-state outputs (HIZ)
  • Power-down mode (EN)
  • ±5V operation
  • ±1200 V/µsec slew rate
  • 1GHz bandwidth
  • Options to include an output series resistor (RS) followed by a parallel resistor (RL) capacitor (CL) network to ground
  • Board is supplied with the 75Ω back termination resistors


  • HDTV/DTV analog inputs
  • Video projectors
  • Computer monitors
  • Set-top boxes
  • Security video
  • Broadcast video equipment

Documentation & Downloads

Title Other Languages Type Format File Size Date
User Guides & Manuals
ISL59445/EL4342E1 User Guide Manual PDF 368 KB