The Texas Instruments SN74AC11PW is a triple 3-input AND gate from the 74AC advanced CMOS logic family. This device is designed for general-purpose board-level logic gating, address decoding, enable/disable functions, and control signal conditioning in systems operating from 2V to 6V supplies.
Supply Voltage Range and Logic Thresholds — Mixed-Voltage Design Fit
Rated for 2V to 6V supply, this gate works directly on 3.3V and 5V rails. The input logic thresholds scale with supply: low-level input is 0.9V to 1.65V, high-level input is 2.1V to 3.85V (at VCC = 5V). This means a 3.3V CMOS output can drive the gate reliably, and the gate's output can drive a 5V TTL input without a level shifter — a common fit in mixed-voltage backplanes or control logic.
Propagation Delay at 5V — Timing Budget for High-Speed Logic
Maximum propagation delay is 8 ns at 5V with a 50 pF load. That's fast enough for most microcontroller and FPGA glue logic running at 50 MHz or below. If your bus timing closure is tight, the 74AC family's edge rate is faster than 74HC or 74LV — budget for signal-integrity checks on long traces or unterminated lines.
Output Drive and Quiescent Current
Each output can sink or source 24 mA, enough to drive a standard LED, a low-power relay coil via a transistor, or a short PCB trace. Quiescent current is a maximum 2 µA, making this gate suitable for battery-powered or always-on logic where static power matters.