| Manufacturer | Part Number | Description |
|---|---|---|
| San Mao | 74LS284 | 4-bit parallel binary multiplier |
| San Mao | 74240 | Eight three-state inverting buffer / line driver / line receiver |
| San Mao electronic | 74139 | Dual Line 2-4 decoder |
| San Mao | 74284 | 4-bit parallel binary multiplier |
| San Mao electronic | 54139 | Dual Line 2-4 decoder |
| San Mao | 54240 | Eight three-state inverting buffer / line driver / line receiver |
| San Mao | 54284 | 4-bit parallel binary multiplier |
