| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | MM74HC155 |  104Kb/4P | Dual 2 - To - 4 Line Decoder-Demultiplexers |
| MM74HC155J |  104Kb/4P | Dual 2 - To - 4 Line Decoder-Demultiplexers |
| MM74HC155N |  104Kb/4P | Dual 2 - To - 4 Line Decoder-Demultiplexers |
 National Semiconductor ... | MM74HC153 |  111Kb/ 4P | Dual 4-Input Multiplexer |
 National Semiconductor ... | MM74HC154 |  148Kb/ 6P | 4-to-16 Line Decoder |
 National Semiconductor ... | MM74HC155J |  104Kb/ 4P | Dual 2 - To - 4 Line Decoder-Demultiplexers |
| MM74HC155N |  104Kb/ 4P | Dual 2 - To - 4 Line Decoder-Demultiplexers |