74HCT14D/C4118

Overview

The Nexperia 74HCT14D/C4118 is a hex inverting Schmitt trigger belonging to the HCT logic family. It features six independent inverters with Schmitt-trigger inputs, designed for interfacing with TTL logic levels. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. It utilizes a SO14 plastic small outline package (SOT108-1) with 14 leads. Key electrical characteristics include high noise immunity, unlimited input rise and fall times, and ESD protection exceeding 2000 V (HBM).

Feature Summary

• Schmitt-trigger inputs transform slowly changing signals into sharply defined jitter-free outputs.
• Reduced input threshold levels enable direct interfacing to TTL logic levels.
• CMOS technology provides low power dissipation while maintaining high noise immunity.
• Input clamp diodes allow current limiting resistors for voltages exceeding VCC.

Applications

• Wave and pulse shapers
• Astable multivibrators
• Monostable multivibrators

Procurement Notes

Verify the specific ordering suffix matches the required package variant and temperature grade. Confirm that the component meets the necessary automotive or industrial qualification standards if applicable to the design. Ensure the datasheet revision aligns with the latest JEDEC ESD specifications before finalizing procurement documentation.

Selection Notes

Select this component when TTL compatibility is required alongside Schmitt-trigger noise rejection capabilities. The HCT series is suitable for systems operating at standard 5 V logic levels. Consider the SO14 package dimensions for PCB layout constraints. Verify that the input signal transition times do not cause excessive additional power dissipation during operation.

Part Context

This part belongs to the Nexperia 74HCT14 series of hex inverters. It is manufactured by Nexperia B.V., which acquired the semiconductor division previously associated with NXP Semiconductors. The product data sheet defines the functional and electrical specifications for mass production use in digital logic applications requiring signal conditioning.

Replacement Considerations

Compatible substitutes include the 74HC14D for HC logic level interfacing and other 74HCT14 variants in different packages such as TSSOP14 (74HCT14PW) or DHVQFN14 (74HCT14BQ), provided pinout and electrical parameters remain compatible.