74HCT27N,652

Overview

The 74HCT27N,652 is a triple 3-input NOR gate manufactured by Nexperia. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-level input compatibility. The device includes clamp diodes on its inputs to facilitate interfacing with voltages exceeding VCC using current limiting resistors. It provides high noise immunity and low power dissipation characteristics typical of CMOS technology. The component supports specified operating temperatures from -40 °C to +125 °C.

Feature Summary

• Triple 3-input NOR logic function
• TTL-compatible input levels
• Input clamp diodes for overvoltage protection

Applications

• Digital logic circuits requiring NOR operations
• Interface applications with TTL-level signals
• General-purpose logic processing

Procurement Notes

Verify the specific package type and temperature grade against project requirements before ordering. Confirm that the HCT series voltage range aligns with the system's 5 V supply rails. Ensure design margins account for the specified propagation delays and output drive capabilities under expected load conditions.

Selection Notes

Select this component when TTL-level inputs are required in a CMOS environment. The HCT variant ensures compatibility with standard TTL logic families while maintaining CMOS noise immunity. Verify that the package style matches the PCB layout constraints and that the thermal performance meets the application's ambient temperature specifications.

Part Context

This part belongs to the 74HCT27 family of triple 3-input NOR gates. It is designed for general-purpose digital applications where logical NOR operations are needed. The device is part of a broader portfolio of logic ICs offering various packaging options and temperature ranges for diverse industrial and commercial uses.

Replacement Considerations

Check for direct pin-to-pin replacements within the same logic family. Verify that any substitute maintains the same HCT input level compatibility and package dimensions. Ensure the alternative component meets or exceeds the required electrical specifications and operating temperature range.