HEF4519B

The HEF4519B provides four multiplexing circuits with common select inputs (S_A, S_B); each circuit contains two inputs (An, Bn) and one output (O_n).  HEF4519B  may be used to select four bits of information from one of two sources.The 'A' inputs are selected when SA is HIGH, the 'B' inputs when S_B is HIGH. When SA and SB are HIGH, the output (O_n) is the logical EXCLUSIVE-NOR of the A_n and B_n inputs (O_n = An Bn).

When S_A and S_B are LOW, the output (O_n) is LOW, independent of the multiplexer inputs (A_n and B_n). The HEF4519B cannot be used to multiplex analogue signals. The outputs utilize standard buffers for best performance.