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| PartNumber | SN74AS621N | SN74AS622DW | SN74AS622N |
| Description | Bus Driver/Transceiver, 1-Func, 8-Bit, True Output, TTL, PDIP20 | Bus Transceiver, AS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDSO20 | Bus Driver/Transceiver, 1-Func, 8-Bit, Inverted Output, TTL, PDIP20 |