Single NOR gate in a 5V logic path
The SN74AHCT1G02DBVR is a single 2-input NOR gate from the 74AHCT family, in a SOT-23-5 package. The 7.5 ns propagation delay at 5 V with a 50 pF load sets the timing floor for a 5 V logic path — fast enough for most glue-logic and bus-interface roles without the shoot-through current of a faster AC family.
Supply rail and logic thresholds
The input low threshold is 0.8 V and the high threshold is 2 V, which means it interprets a standard 5 V CMOS or TTL output correctly but may not see a 3.3 V signal as a valid high without a level shifter. Quiescent current maxes at 1 µA, so it adds negligible draw to a 5 V rail.