Quad NAND gate for general-purpose logic
The SN74HC00D is a Texas Instruments quad 2-input NAND gate from the 74HC high-speed CMOS logic family. It integrates four independent NAND gates in a single 14-SOIC package, each with two inputs. The 2 µA maximum quiescent current keeps the power budget minimal when the outputs are static.
Switching speed and drive capability
Maximum propagation delay is 15 ns at 6V with a 50 pF load. This sets the upper data rate for a bus or clock gating path — at 5V the delay is typically a few nanoseconds longer, so budget 18-20 ns for worst-case timing closure in a 3.3V system. Each output can source or sink 5.2 mA. This drives a single LSTTL load or a short PCB trace directly, but for fan-out to multiple inputs or longer lines, a buffer stage is advisable. Input logic levels are specified as 0.5V to 1.8V for low and 1.5V to 4.2V for high across the supply range. The 0.3V guard band between the low-max and high-min at 2V supply means the gate rejects noise on a 1.8V logic rail.
The footprint matches standard SOIC-14 land patterns; the 0.154" width fits narrower board channels where a 0.300" DIP would not. Supplied in tube packaging — the tubes protect the leads during handling but the parts are not on tape-and-reel, so factor in manual placement or tube-fed pick-and-place if the line is automated.
Compliance and sourcing posture
The date-code and laser etch on the package body should trace to a TI-authorized fab. Sourced through independent distribution with lot traceability; availability confirmed at quote time.