Nexperia USA Inc. 74AHCT14D/S400,118

Overview

74AHCT14D/S400,118 from Nexperia is a hex Schmitt-trigger inverter IC operating at 4.5–5.5 V supply, with 8 mA output drive, 10 ns propagation delay at 5 V, and TTL-compatible inputs. It performs signal conditioning and noise-immune digital inversion in microcontroller reset circuits and sensor interface stages.

For engineers reviewing the 74AHCT14D/S400,118 datasheet, 74AHCT14D/S400,118 pinout, 74AHCT14D/S400,118 application, or 74AHCT14D/S400,118 equivalent, key selection factors include input hysteresis width (≈0.8 V), rail-to-rail output swing, industrial temperature range (−40°C to +125°C), and SO14 package compatibility with legacy 74-series layouts.

Technical Context

This device implements six independent Schmitt-trigger inverters in a single monolithic CMOS IC. Each gate features asymmetric input thresholds (V_T+ ≈ 1.9 V, V_T− ≈ 1.1 V at V_CC = 5 V) and push-pull CMOS outputs capable of sourcing/sinking 8 mA.

The AHCT logic family ensures TTL-level input compatibility while delivering CMOS-level output voltage levels and low static power consumption (<1 µA typical I_CC). It is designed for use in mixed-voltage systems where noise immunity and clean edge regeneration are required.

Key Specifications

Pinout & Package

Supplied in a 14-lead SOIC (Small Outline Integrated Circuit) package, 3.9 mm body width, 1.27 mm pitch, JEDEC MS-012AC compliant, with gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt-trigger inverter applications.

Compared with SN74AHCT14DR, 74AHCT14D/S400,118 offers identical performance but with Nexperia's extended product longevity commitment and broader industrial temperature validation. Against 74HC14D,653, it enables drop-in replacement in 5 V TTL-mixed systems without redesigning input bias networks.

Availability

74AHCT14D/S400,118 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and sensor interface modules requiring stable component supply and long-term production continuity.

Supply support for 74AHCT14D/S400,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-volume, high-reliability logic, discrete, and MOSFET solutions for industrial, automotive, and computing markets.

The 74AHCT series targets robust 5 V digital interfacing in harsh environments, combining TTL compatibility with CMOS efficiency and extended temperature operation.

FAQ

What is the minimum supply voltage for guaranteed TTL-compatible input operation?

The 74AHCT14D/S400,118 guarantees TTL-compatible input thresholds down to V_CC = 4.5 V. Below this, input high/low recognition may degrade; operation at 4.5 V is specified per datasheet Table 7, with V_IH(min) = 2.0 V and V_IL(max) = 0.8 V.

Can this device drive an LED directly?

Yes - each output can sink up to 8 mA. With a 5 V supply and typical red LED (V_F ≈ 1.8 V), a 390 Ω series resistor limits current to ~8.2 mA, staying within absolute maximum ratings and maintaining logic-level output swing.

Is the SO14 package RoHS and REACH compliant?

Yes - the 74AHCT14D/S400,118 uses lead-free (Pb-free) terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed in Nexperia's official compliance documentation (DocID: ASB-00124).

Does this part support hot-swap or live-insertion?

No - the 74AHCT14D/S400,118 lacks I_OFF protection or power-off isolation. Applying input signals while V_CC is unpowered may cause latch-up or excessive current through internal clamps, per Absolute Maximum Ratings section of the datasheet.