Triple 3-input NAND in 14-SOIC
The Texas Instruments SN74ALS10AD is a triple 3-input NAND gate from the 74ALS family. It integrates three independent NAND gates, each with three inputs, in a single 14-SOIC package. Each gate sinks or sources up to 8 mA on the output, with a propagation delay of 11 ns typical at 5 V into a 50 pF load.
What the 11 ns propagation delay means for timing closure
The 11 ns max propagation delay at 5 V and 50 pF sets the path budget for combinatorial logic between clock edges. In a 5 V system clocked at 33 MHz (30 ns period), a single gate consumes about one-third of the cycle — leaving headroom for interconnect and additional stages. The 8 mA output drive (I_OH/I_OL) is enough to drive up to four 74ALS inputs (fan-out of 4) without signal degradation. The 0.8 V low-level threshold and 2 V high-level threshold are standard TTL-compatible levels, so the gate interfaces directly with other 5 V TTL or ALS logic without translation.
Board-fit and package note
The 14-SOIC package has a body width of 3.90 mm (0.154") and a 1.27 mm lead pitch. The footprint matches standard SOIC-14 land patterns; no special thermal pad or exposed paddle is present. The tube packaging (50 pieces per tube typical) is the standard shipping medium for this logic gate. Tape and reel variants exist for the same die in the 74ALS family, but this order code specifies tube delivery.