Below is the pinout for the DG303ACWE+ 16 pin SOIC (W)::
Pin 1 = N/C
Pin 2 = S3
Pin 3 = D3
Pin 4 = D1
Pin 5 = S1
Pin 6 = IN1
Pin 7 = GND
Pin 8 = N/C
Pin 9 = N/C
Pin 10 = V-
Pin 11 = IN2
Pin 12 = S2
Pin 13 = D2
Pin 14 = D4
Pin 15 = S4
Pin 16 = V+
Pins 1-7 are the same as for the 14 pin pkg
Pins 8 and 9 are N/C
Pins 10-16 are same as pins 8-14 of the 14 pin pkg