onsemi

MC74AC02D

MC74AC02D Description

The MC74AC02D from onsemi is a quad 2-input NOR gate IC belonging to the 74AC series, designed for high-performance logic applications. Housed in a 14-pin SOIC package, it operates over a 2V to 6V supply range, making it versatile for both 3.3V and 5V systems. With a maximum propagation delay of 6.5ns at 5V and 50pF load, it ensures fast signal processing, while its low quiescent current (4 µA max) enhances power efficiency. This surface-mount (SMD) device is RoHS-compliant and classified under ECCN EAR99, suitable for industrial and commercial use.

MC74AC02D Features

• High-Speed Operation: 6.5ns propagation delay at 5V enables rapid logic transitions.
• Wide Voltage Range (2V–6V): Compatible with TTL and CMOS levels, supporting mixed-voltage designs.
• Balanced Output Drive: 24mA sink/source current ensures robust signal integrity in noisy environments.
• Low Power Consumption: 4 µA max quiescent current minimizes standby power loss.
• Advanced CMOS Technology: Combines AC-series speed with CMOS power efficiency.
• Surface-Mount Package (SOIC-14): Ideal for space-constrained PCB layouts.

MC74AC02D Applications

• Digital Signal Processing: Used in clock distribution and data synchronization circuits.
• Industrial Control Systems: Reliable for PLC I/O interfaces due to noise immunity.
• Consumer Electronics: Integrates into smart home controllers and battery-powered devices.
• Automotive Logic Circuits: Suitable for low-voltage sensor interfaces (2V–6V range).
• Legacy System Upgrades: Replaces slower 74HC02 or 74LS02 NOR gates in 5V designs.

Conclusion of MC74AC02D

The MC74AC02D excels in high-speed, low-power logic applications, offering superior performance over older HC/LS-series NOR gates. Its wide voltage compatibility and strong output drive make it ideal for mixed-voltage systems and noise-sensitive environments. Though marked obsolete, it remains a dependable choice for legacy designs or niche industrial applications requiring AC-series speed and CMOS efficiency. For new designs, verify alternative active-series replacements from onsemi.