SN74ACT14D

Overview

The SN74ACT14D is a hex Schmitt-trigger inverter from Texas Instruments, housed in a 14-pin SOIC package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -40°C to 85°C. The device features TTL-compatible inputs with hysteresis for noise immunity and provides continuous output drive currents of ±24 mA at 5 V. Maximum propagation delay is specified at 9.5 ns under standard load conditions.

Feature Summary

• TTL-compatible Schmitt-trigger inputs enable reliable signal conditioning for slow or noisy waveforms
• High-output drive capability supports direct driving of transmission lines and heavy loads
• Hysteresis characteristics effectively eliminate switching jitter during signal transitions

Applications

• Inverting digital logic signals
• Switch debouncing applications
• Synchronous inversion of clock inputs

Procurement Notes

Verify the specific suffix 'D' corresponds to the standard SOIC-14 package configuration. Confirm RoHS compliance status as required by project specifications. Ensure the operating temperature grade matches the intended environmental constraints. Cross-reference the manufacturer part number against current datasheets to validate pinout and electrical parameters before integration.

Selection Notes

Select this component when input signal integrity requires noise filtering via Schmitt trigger action. The ACT series offers faster switching speeds compared to legacy counterparts while maintaining CMOS power efficiency. Verify that the 24 mA output drive meets the load requirements without exceeding thermal limits. Ensure the 4.5 V to 5.5 V supply range aligns with the system power architecture.

Part Context

This device belongs to the Texas Instruments 74ACT logic family, designed for high-speed digital applications. It serves as a specialized inverter variant within the broader 74-series ecosystem, providing enhanced input thresholds compared to standard inverters. The SOIC packaging facilitates surface-mount assembly in compact electronic designs requiring robust signal inversion capabilities.

Replacement Considerations

SN74ACT14DR

FAQ

What is the primary function of the Schmitt trigger inputs?

The Schmitt trigger inputs provide defined threshold voltages with hysteresis, allowing the device to clean up noisy or slowly changing signals into sharp digital transitions.

Can this device drive transmission lines directly?

Yes, the device is capable of driving 50-ohm transmission lines due to its high output drive current capability of ±24 mA.