Tips for using data selectors

• A single part may contain more than one set of inputs, each with a single corresponding output. A single set of selection pins is applied to all.
• There is usually a strobe input pin ('ST') that must be active for selection to be enabled.
• A tri-state disable pin 'D' may be available that (when active) effectively disconnects the output from the circuit.
• The 4019 AND/OR select gate works differently from the other data selectors. Each output is the logical function of two data inputs and two selection inputs, as follows:
  Qi = ( SA AND Ai ) OR ( SB AND Bi )

See also:

• Data selectors