Quad 2-input XNOR in the 74HC family
The MM74HC30MX is a quad 2-input XNOR (Exclusive NOR) gate from Texas Instruments' 74HC series, a high-speed CMOS logic family that balances the low power of CMOS with the speed of LSTTL. With four independent gates on a single 14-SOIC package, it serves as a digital comparator or parity checker in mixed-voltage designs.
Speed and power profile
Maximum quiescent current is 2 µA, so the gate's own draw is negligible in battery-powered or energy-harvesting systems. Output drive is 5.2 mA source and sink at the rated supply, enough to fan out to four standard 74HC inputs without buffering.