74AC02TTR

Overview

The 74AC02TTR is a quad 2-input NOR gate manufactured using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 2V to 6V, providing high-speed performance with typical propagation delays of 4.2ns at 5V and 5.5ns at 3.3V. The device features low power dissipation with a maximum quiescent current of 2μA at 25°C and symmetrical output impedance ensuring |IOH| = IOL = 24mA minimum. It offers high noise immunity with VNIH and VNIL defined as 28% of VCC minimum, and includes protection circuits against static discharge for 2kV ESD immunity.

Feature Summary

• Advanced CMOS fabrication utilizing sub-micron silicon gate and double-layer metal wiring for enhanced speed and stability
• High noise immunity and stable output achieved through a three-stage internal circuit design including buffer output
• Symmetrical output impedance and balanced propagation delays (tPLH ≈ tPHL) for consistent signal timing
• Integrated protection circuits on all inputs and outputs providing immunity against static discharge and transient excess voltage

Applications

• High-speed digital logic processing in consumer electronics
• Signal buffering and inversion in communication systems
• General-purpose logic functions in industrial control equipment
• Timing-critical applications requiring balanced propagation delays

Procurement Notes

Verify the specific ordering code matches the required package type, as the TTR suffix indicates Tape and Reel packaging in TSSOP-14 format. Confirm that the supply voltage requirements align with the 2V to 6V operating range specified in the datasheet. Ensure input voltage levels remain within 0 to VCC limits to prevent damage. Check environmental specifications if operation outside the standard -55°C to 125°C temperature range is required.

Selection Notes

Select this component when high-speed NOR logic functionality is required alongside low power consumption characteristics. The 74AC02TTR is suitable for designs needing compatibility with 5V transmission lines and robust noise immunity. Consider the TSSOP-14 package constraints regarding thermal management and board space. Verify that the load capacitance does not exceed the recommended 50pF to maintain specified switching speeds.

Part Context

This device belongs to the 74AC series of advanced CMOS logic gates, offering improved performance over standard 74LS counterparts. It maintains pin and function compatibility with the legacy 7402 quad 2-input NOR gate family while delivering significantly faster switching speeds and lower power dissipation. The technology supports operation across a wide voltage range, making it versatile for various digital system architectures.

Replacement Considerations

Direct functional replacements include other 74AC02 variants in different packages such as DIP or SOP formats. Cross-family substitution with 74HC02 may be considered if slightly slower speeds are acceptable, though voltage ranges and drive strengths differ. Ensure any substitute maintains the required 2V to 6V operating range and ESD protection levels.