74AC08TTR

Overview

The STMicroelectronics 74AC08TTR is a quad 2-input AND gate in a 14-TSSOP package. It operates on a supply voltage of 2V to 6V with a typical propagation delay of 4ns at 5V. The device features symmetrical output impedance with minimum drive currents of 24mA and low quiescent current of 2µA max. It provides high noise immunity, ESD protection of 2kV, and supports 50Ω transmission line driving.

Feature Summary

• Advanced high-speed CMOS technology for rapid switching
• Symmetrical output impedance ensuring balanced signal integrity
• High noise immunity and stable output performance
• Integrated protection circuits against static discharge

Applications

• General-purpose logic applications requiring high speed
• Systems utilizing 50Ω transmission lines
• Digital circuit designs needing robust noise immunity

Procurement Notes

Verify the specific ordering code matches the required package type, as the TTR suffix indicates tape and reel packaging. Confirm that the component status aligns with project lifecycle requirements, noting that older series may have limited availability compared to newer alternatives. Ensure compatibility with existing PCB footprints before finalizing procurement decisions.

Selection Notes

Select this component when high-speed operation is critical alongside low power consumption. It is suitable for designs requiring 5V tolerant interfaces or direct interfacing with 3.3V systems within its specified operating range. Consider the 14-TSSOP package for space-constrained surface-mount applications requiring standard pinout compatibility.

Part Context

This part belongs to the 74AC series of advanced CMOS logic gates, offering significantly faster speeds than standard 74HC devices while maintaining low power dissipation. It serves as a direct functional replacement for legacy 74LS08 parts in terms of pinout and logic function, facilitating upgrades in existing digital designs without major hardware modifications.

Replacement Considerations

Direct substitutes include other manufacturers' 74AC08 variants in TSSOP-14 packages. Verify electrical characteristics such as propagation delay and output drive strength to ensure compatibility with the original design specifications.