54151 Datasheet, National Semiconductor

complementary W and Y outputs whereas the 150 has an inverted (W) output only The 151A incorporates address buffers which have symmetrical propagation delay times through.

These data selectors multiplexers contain full on-chip decoding to select the desired data source The 150 selects one-of-sixteen data sources the 151A selects one-of-eight data sources The 150 and 151A have a strobe input which must be at a low logic.