The ADG1311 / ADG1312 / ADG1313 are monolithic CMOS
devices containing four independently selectable switches
designed on a CMOS process.
Datasheet ADG1312 on Analog.com
I have a question about NC-pin(pin 12) of ADG1312. My friend worries a latch-up trouble caused by noise like a ESD. Can he connect this NC-pin to gnd through resister ? Or, should it be left as not connect anything ?