Six Schmitt-trigger inverters in a single 14-SOIC package
The SN74ACT14NSR packs six independent inverter gates, each with a Schmitt-trigger input, into a 14-SOIC (0.209", 5.30 mm width) surface-mount package. It belongs to the 74ACT series from Texas Instruments, a logic family that combines the speed of advanced CMOS with TTL-compatible input thresholds. Each of the six channels accepts a single input and delivers a clean inverted output, with the Schmitt trigger providing hysteresis that rejects noise on slowly changing or noisy input signals.
Output drive and timing at 5 V
The outputs source and sink 24 mA each, enough to drive standard TTL loads, small relays, or LED indicators directly without a buffer stage. Quiescent current is 2 µA maximum, meaning the chip draws negligible current when the inputs are static — useful in battery-backed or power-sensitive designs where the logic sits idle most of the time. The input logic levels are specified as 0.5 V to 1.4 V for low and 1.2 V to 2.1 V for high, which are TTL-compatible thresholds — a 5 V TTL output drives this input directly without a level shifter.
The part is ROHS3 compliant, so it meets the current EU restriction on hazardous substances without exemptions. The supplier device package is 14-SO, the standard small-outline footprint for this pin count.