74HCT27DB,118

Overview

The Nexperia 74HCT27DB,118 is a triple 3-input NOR gate from the 74HCT logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible input levels. The device includes input clamp diodes for interfacing with voltages exceeding VCC. It provides high noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B. The component is housed in an SO14 plastic small outline package (SOT108-1) and supports operating temperatures from -40 °C to +125 °C.

Feature Summary

• Triple 3-input NOR gate configuration
• TTL-compatible input levels
• Input clamp diodes included
• High noise immunity

Applications

• Digital logic circuits requiring NOR functions
• Signal processing applications
• General-purpose logic systems

Procurement Notes

Verify the specific ordering suffix '118' corresponds to the SSOP or SO package variant required by your design, as datasheet revisions indicate changes to available package types. Confirm current production status directly with Nexperia or authorized distributors, as product availability and discontinuation notices may affect long-term sourcing. Ensure compliance with RoHS directives before procurement.

Selection Notes

Select this component when TTL-level inputs are required alongside CMOS output characteristics. The 74HCT series ensures compatibility with standard TTL logic families while offering improved power dissipation compared to older technologies. Verify that the SO14 package dimensions fit the PCB layout constraints and that the wide temperature range meets environmental requirements.

Part Context

This part belongs to the 74HCT logic family, which bridges TTL and CMOS technologies. The 74HCT27 specifically implements three independent 3-input NOR gates. It is designed for general-purpose digital applications where reliable logic operations are needed under varying electrical conditions. The device adheres to JEDEC standards for robustness and signal integrity.

Replacement Considerations

Check for updated package options such as TSSOP14 if space constraints change. Verify functional equivalence with other 74HCT27 variants from different manufacturers, ensuring pinout compatibility and matching electrical specifications.