These data selectors/multiplexers contain full on-chip de-coding 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 level to enable these devices. A high level at the strobe forces the W output high and the Y output (as applicable) low.
The 151A features complementary W and Y outputs, where-as the 150 has an inverted (W) output only. The 151A incorporates address buffers which have sym-metrical propagation delay times through the complementa-ry paths. This reduces the possibility of transients occurring at the output(s) due to changes made at the select inputs, even when the 151A outputs are enabled (i.e., strobe low).
- 150 selects one-of-sixteen data lines
- 151A selects one-of-eight data lines
- Performs parallel-to-serial conversion
- Permits multiplexing from N lines to one line
- Also for use as Boolean function generator
- Typical average propagation delay time, data input to W output
150 11 ns
151A 9 ns
- Typical power dissipation
150 200 mW
151A 135 mW
- Alternate Military/Aerospace device (54150, 54151A) is available. Contact a National Semiconductor Sales Of- fice/Distributor for specifications.