Single 8-input NAND in a 14-pin DIP
The SN74F30N is a single 8-input NAND gate from Texas Instruments' 74F series, packaged in a 14-pin DIP (0.300" width, 7.62mm pitch). It performs the NAND logic function on eight inputs and outputs a single result — useful for wide-input decode, parity generation, or combining multiple sensor signals into one interrupt line.
5ns propagation delay sets the timing budget
Maximum propagation delay is 5ns at 5V supply with a 50pF load. At a 5V rail, this is the ceiling for data-to-output valid time — a downstream latch or counter clocked at 100 MHz sees a 5ns gate delay as half a clock period, so the input setup must account for it. The 74F family uses Schottky clamping to keep the delay short without the power penalty of full Schottky TTL. Output drive is asymmetric: 1mA source (logic high) and 20mA sink (logic low). The high-side fan-out is limited to about 10 standard 74F loads; the low side can drive 20 or more. If the gate feeds a long trace or a high-capacitance input, the rise time on the high-going edge will be slower than the fall — a consideration for bus-hold or line-termination planning. For a single gate this is modest — the 74F series draws more standby current than 74HC or 74LVC, but the speed justifies it. The commercial temperature grade (0°C to 70°C) limits this part to indoor, non-condensing environments.
Through-hole DIP for legacy or prototype boards
The 14-DIP package (0.300" body width, 7.62mm lead pitch) is a through-hole footprint that dates back to the original TTL era. It suits socketed prototypes, hand-assembly runs, or rework of legacy boards where a surface-mount gate would require a new layout. The 0.100" pin spacing is breadboard-compatible. Input logic thresholds are TTL-compatible: low at 0.8V max, high at 2V min. This means the gate interprets a 0V–0.8V signal as logic low and a 2V–5.5V signal as logic high — standard for 5V TTL families. No level translation is needed when driving from another 5V TTL or 3.3V CMOS with a pull-up to 5V.
Active production, ROHS3, no obsolescence watch
ROHS3 compliant (lead-free, no exempt substances) — no need to chase a RoHS exemption expiry or stockpile legacy inventory. Sourced to order against BOM quantities. No stock-holding claim — each lot is verified for marking consistency and date-code traceability before shipment.