74AHCT08D,118

Overview

The Nexperia 74AHCT08D,118 is a quad 2-input AND gate in the 74AHCT logic series. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible input levels. The device includes overvoltage tolerant inputs up to 5.5 V, Schmitt-trigger action on all inputs, and high noise immunity. It is housed in an SO14 (SOT108-1) package with a body width of 3.9 mm. The component supports an ambient temperature range from -40 °C to +125 °C and provides balanced propagation delays.

Feature Summary

• TTL-compatible input levels for direct interfacing with Transistor-Transistor Logic systems
• Overvoltage tolerant inputs allowing use as translators in mixed voltage environments
• Schmitt-trigger action on all inputs to ensure clean signal transitions

Applications

• Mixed voltage translation between CMOS and TTL domains
• General-purpose digital logic processing
• Signal buffering and conditioning in industrial control systems

Procurement Notes

Verify that the specific part number matches the required AHCT logic family rather than standard AHC or other variants. Confirm the SO14 package designation aligns with PCB footprint requirements. Ensure the operating temperature range meets the environmental specifications of the target application before finalizing procurement.

Selection Notes

Select this component when TTL-level input compatibility is required alongside high-speed CMOS performance. The 74AHCT series bridges the gap between older TTL standards and modern low-power CMOS technologies. Consider the wide operating temperature range and robust ESD protection characteristics for demanding industrial or commercial environments.

Part Context

This component belongs to the 74AHC/AHCT logic family, which combines the high speed of Advanced High-speed CMOS with the pinout compatibility of standard 74-series logic. The 'AHCT' designation specifically indicates TTL-compatible inputs, making it suitable for upgrading legacy designs while maintaining interface integrity with existing TTL drivers.

Replacement Considerations

Check for equivalent parts such as the 74AHC08D,118 if TTL input compatibility is not strictly required. Verify pinout and package dimensions against alternatives like the 74HC08D,118 to ensure mechanical interchangeability without redesigning the circuit board.