The four switches are bilateral, equally matched for AC or bidirectional signals. The ON resistance variation with analog signals is quite low over a 15V analog input range. The switches in the DG411/883 and DG412/883 are identical, differing only in the polarity of the selection logic. Two of the switches in the DG413/883 (#1 and #4) use the logic of the DG211 and DG411/883 (i.e. a logic "0" turns the switch ON) and the other two switches use DG212 and DG412/883 positive logic. This permits independent control of turn-on and turn-off times for SPDT configurations, permitting "breakbefore-make" or "make-before-break" operation with a minimum of external logic.