SN74AHCT14PW-P

Overview

The SN74AHCT14PW is a commercial-grade hex Schmitt-trigger inverter from the AHCT logic family, housed in a 14-pin TSSOP 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 +125°C. The device features TTL-compatible inputs with distinct positive-going (VT+) and negative-going (VT-) threshold voltages to provide hysteresis. Electrical characteristics include a high-level output current of -8 mA and a low-level output current of 8 mA. Propagation delays are specified at 1 ns to 9 ns depending on load capacitance.

Feature Summary

• TTL-voltage compatible inputs allow direct interfacing with standard TTL logic levels.
• Schmitt-trigger action provides noise immunity by accepting slow or noisy input signals without oscillation.
• High electrostatic discharge protection exceeds JESD 22 standards for human-body, machine, and charged-device models.

Applications

• Servers
• Network switches
• Telecom infrastructures
• Tests and measurements

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest Package Option Addendum to confirm active production status and moisture sensitivity level ratings. Ensure the selected package variant matches the required thermal resistance values for the target application environment. Cross-reference the datasheet revision history to validate updated thermal metrics and parameter testing conditions before finalizing procurement specifications.

Selection Notes

Select this component when TTL compatibility is required alongside noise filtering capabilities provided by Schmitt triggers. The AHCT series bridges the gap between CMOS performance and TTL input thresholds. Consider the TSSOP package dimensions and thermal characteristics relative to board space constraints. Verify that the operating temperature range meets the environmental requirements of the deployment location.

Part Context

This device belongs to the SNx4AHCT14 family of hex inverters manufactured by Texas Instruments. The 'SN' prefix indicates a commercial rating, while '74' denotes the standard industrial temperature range. The 'AHCT' series specifies advanced high-speed CMOS technology with TTL-compatible inputs. This family includes various package options such as SOIC, SSOP, and VQFN to suit different PCB layout needs.

Replacement Considerations

SN74AHCT14PWR

FAQ

How does the Schmitt trigger function improve signal integrity?

The Schmitt trigger provides different input threshold levels for positive-going and negative-going signals. This hysteresis prevents output oscillation caused by slow-rising or noisy input waveforms, effectively cleaning up the signal.

What is the recommended handling for unused inputs?

All unused inputs must be held at VCC or GND to ensure proper device operation. Floating inputs can result in undefined operational states and increased power consumption due to partial conduction of drive transistors.