DEs criptIONThe DG3157A, DG3157B are high-speed single-poledouble-throw, low voltage switch. Using sub-micro CMOStechnology, the DG3157A, DG3157B achieves low onresistanceand negligible propagation delay. The DG3157A,DG3157B can handle both analog and digital signals andpermits signals with amplitudes of up to VCC to betransmitted in either direction. Select pin of control logic inputcan be over the V+. When the select pin is low, B0 isconnected to the output A pin. When the select pin is high,B1 is connected to the output A pin. The path that is open willhave a high-impedance state with respect to the output A pin.Break before make is guaranteed. The DG3157A has aninternal pull down resistor on the control pin S, while theDG3157B does not.
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