I currently use the HI9P0547-9 in my designs, does Analog Devices have a direct replacement that incorporates the
Active Overvoltage Protection?
Please see the Mux16 which is a Diff 8:1 mux with Over Voltage protection. http://www.analog.com/static/imported-files/data_sheets/MUX16.pdf
Its Pin compatible but its only avaialble in Cerdip, PLCC and DIP package.
I believe you are using the SOIC package so it will not be a drop-in replacement.
Is this a new design?
Other available Over-voltage protection muxes can be found at below link;
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