SN74AHCT14D

Overview

The SN74AHCT14D is a hex inverter integrated circuit manufactured by Texas Instruments, belonging to the 74AHCT logic family. It features six independent Schmitt-trigger inverters housed in a 14-pin Small Outline Integrated Circuit (SOIC) package. The device operates within a supply voltage range of 4.5V to 5.5V and supports TTL-compatible input levels with CMOS output characteristics. Key electrical specifications include a maximum static current of 2µA, output drive currents of 8mA for both high and low states, and a typical propagation delay of 8ns at 5V with a 50pF load. It functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates six independent Schmitt-trigger inverters for noise-immune signal conditioning
• Provides TTL-compatible input thresholds while maintaining CMOS output drive capabilities
• Operates within a standard 4.5V to 5.5V single-supply voltage range
• Delivers balanced 8mA source and sink output drive currents

Applications

• Signal conditioning for noisy digital environments requiring hysteresis
• Waveform shaping and pulse generation circuits
• TTL-to-CMOS level translation interfaces
• Clock signal buffering and inversion in digital systems

Procurement Notes

Verify the specific suffix 'D' corresponds to the 14-SOIC package variant when sourcing. Confirm RoHS3 compliance status as per the latest manufacturer documentation. Ensure the operating environment remains within the specified -40°C to +85°C temperature limits. Cross-reference the ordering part number against official Texas Instruments databases to avoid confusion with similar packages like DGVR or PWR.

Selection Notes

Select this component when designing 5V logic systems requiring Schmitt-trigger inputs for noise immunity. It serves as a direct replacement for older 74HCT14 devices where improved speed and lower power consumption are beneficial. Consider the SOIC-14 footprint constraints during PCB layout. Evaluate thermal dissipation requirements if multiple inverters operate simultaneously under heavy loads.

Part Context

This device is part of the broader 74AHCT series, which combines the high-speed performance of AHCT technology with CMOS low-power characteristics. It complements other logic families by offering robust interface capabilities between TTL and CMOS domains. The SN74AHCT14D specifically addresses applications needing reliable inversion with defined switching thresholds, distinguishing it from standard inverters lacking hysteresis.

Replacement Considerations

SN74AHCT14DR: Tape-and-reel version of the same functional device. SN74AHCT14DGVR: TVSOP-14 package alternative with identical electrical characteristics. SN74AHCT14PWR: TSSOP-14 package option for space-constrained designs.