| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| N74ALS253N | Dual 4–input multiplexer (3–State) | Philips-Semiconductors | SOT38 | - | - | - | 115 K |
| N74ALS257D | Data selector/multiplexer | Philips-Semiconductors | SOT109 | - | - | - | 129 K |
| N74ALS257N | Data selector/multiplexer | Philips-Semiconductors | SOT38 | - | - | - | 129 K |
| N74ALS258D | Data selector/multiplexer | Philips-Semiconductors | SOT109 | - | - | - | 129 K |
| N74ALS258DB | Data selector/multiplexer | Philips-Semiconductors | SOT338 | - | - | - | 129 K |
| N74ALS258N | Data selector/multiplexer | Philips-Semiconductors | SOT38 | - | - | - | 129 K |
| N74ALS273D | Octal D-type flip-flop | Philips-Semiconductors | SOT163 | - | - | - | 114 K |
| N74ALS273DB | Octal D-type flip-flop | Philips-Semiconductors | SOT339 | - | - | - | 114 K |
| N74ALS273DB | Octal D-type flip-flop | Philips-Semiconductors | SOT339 | - | - | - | 114 K |
| N74ALS27D | Triple 3-Input NOR gate | Philips-Semiconductors | SOT108 | - | - | - | 88 K |
| N74ALS27N | Triple 3-Input NOR gate | Philips-Semiconductors | SOT27 | - | - | - | 88 K |
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