74HCT02DB,118

Overview

The Nexperia 74HCT02DB,118 is a quad 2-input NOR gate belonging to the HCT 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 is housed in an SO14 plastic small outline package (SOT108-1) with a body width of 3.9 mm. It supports an ambient temperature range from -40 °C to +125 °C. Propagation delay is specified at 19 ns maximum at 4.5 V and 29 ns maximum at +125 °C under standard test conditions.

Feature Summary

• Provides four independent 2-input NOR logic functions
• Compatible with TTL logic input levels
• Includes input clamp diodes for interfacing voltages exceeding VCC
• High noise immunity and low power dissipation

Applications

• General-purpose digital logic circuits
• Signal processing applications requiring NOR functionality
• Industrial control systems operating within specified temperature ranges

Procurement Notes

Verify the specific ordering suffix

Selection Notes

Select this component when TTL-level compatibility is required alongside CMOS performance characteristics. Ensure the application environment remains within the specified -40 °C to +125 °C temperature range. Confirm that the SO14 package dimensions align with the PCB footprint requirements. Validate that the supply voltage stays strictly between 4.5 V and 5.5 V to maintain correct logic thresholds.

Part Context

This part belongs to the 74HCT series, which bridges the gap between older TTL standards and modern CMOS technology. The 'DB' designation indicates the SO14 surface-mount package variant. As a standard logic gate, it serves as a fundamental building block for complex combinational logic designs in embedded systems and consumer electronics.

Replacement Considerations

Direct pin-compatible replacements include other manufacturers' 74HCT02 devices in SO14 packages. Verify electrical specifications such as propagation delay and output current drive capabilities before substitution. Cross-reference package dimensions to ensure mechanical fit.