Quad 2-input NOR gate in 14-DIP — what it is and where it fits
The Texas Instruments SN74F02N is a quad 2-input NOR gate from the 74F family, packaged in a 14-pin DIP (0.300" body) for through-hole mounting. It contains four independent NOR gates, each with two inputs, operating from a 4.5V to 5.5V supply. The 74F series is a high-speed bipolar logic family, and this part delivers a maximum propagation delay of 5.5 ns at 5V with a 50 pF load — fast enough for bus arbitration, address decoding, or control logic in systems where CMOS equivalents would add unnecessary gate delay. The commercial temperature range (0°C to 70°C) suits it for indoor equipment, office automation, and benchtop instrumentation where ambient temperature stays controlled.
5.5 ns propagation delay — what it means for the bus
The 5.5 ns propagation delay (measured at 5V supply, 50 pF load) is the headline spec for this gate. In a 5V TTL system, that delay is tight enough to pass through several gate stages within a single clock cycle at 50 MHz without accumulating setup-time violations. The 74F family uses a bipolar process that gives faster edge rates than 74HC or 74LS, but also draws more supply current — a trade-off worth noting if the board is power-constrained. The output drive capability is 1 mA sourcing and 20 mA sinking, which is typical for this logic family and sufficient to drive one or two standard TTL loads per output.
Active production — no LTB risk for this BOM line
The SN74F02N carries an Active lifecycle status, meaning Texas Instruments continues to manufacture it without a last-time-buy notice. The part is ROHS3 compliant.