MC74HC02ADG

The onsemi MC74HC02ADG is a quad 2-input NOR gate logic device implemented in high-speed silicon-gate CMOS technology, supplied in a 14-lead SOIC surface-mount package. As a member of the HC logic family, it combines the speed performance of LSTTL with the inherent low power consumption of CMOS, operating over a wide supply voltage range typically from 2 V to 6 V. The inputs feature a standard CMOS interface with high noise immunity and low input current, while the outputs deliver balanced drive capability and symmetric propagation delays that support reliable operation in synchronous and asynchronous logic circuits. The “DG” suffix designates a lead-free, RoHS‑compliant finish, and the device generally meets industrial temperature range requirements, making it suitable for production environments where compliance with modern environmental directives is mandatory.

Typical applications span industrial automation, aerospace and defense electronics, and other high-reliability systems where standard NOR gates perform fundamental boolean logic, signal gating, clock buffering, and control sequencing functions. The part is commonly integrated into embedded controllers, test and measurement instrumentation, avionics modules, and communication infrastructure that demand deterministic logic behavior and long service life. From a procurement perspective, the MC74HC02ADG benefits from onsemi’s policy of sustaining mature HC logic products for extended periods, mitigating obsolescence risk in programs with long qualification cycles. Design engineers and supply‑chain professionals should verify the required temperature grade and source through authorized distribution channels to ensure traceability and avoid counterfeit risk, particularly when intended for defense or aerospace platforms where component pedigree documentation is essential.