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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

Diodes Incorporated 74AHCT1G14QSE-7

Name: 74AHCT1G14QSE-7
Brand: Diodes Incorporated
SKU: 74AHCT1G14QSE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHCT1G14QSE-7

Manufacturer:: Diodes Incorporated

Category:: Gates and Inverters

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: 74AHCT1G14QSE-7.pdf

Description:: IC INVERT SCHMITT 1CH 1IN SOT353

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Product details

Overview

74AHCT1G14QSE-7 from Diodes Incorporated is a single-channel Schmitt-trigger inverter IC designed for automotive-grade logic signal conditioning. It operates from 4.5V to 5.5V, delivers ±8mA output drive at 5.0V, features hysteresis (ΔVT = 0.35–1.6V), and supports –40°C to +125°C ambient operation. It is used in engine control units to clean noisy sensor signals before microcontroller input.

For engineers reviewing the 74AHCT1G14QSE-7 datasheet, 74AHCT1G14QSE-7 pinout, 74AHCT1G14QSE-7 application, or 74AHCT1G14QSE-7 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, input hysteresis width, propagation delay (1.0–9.0ns), output drive strength, and SOT353 package thermal resistance (θ_JA = 385°C/W).

Technical Context

This device implements a single inverting Schmitt trigger with rail-tolerant inputs and push-pull CMOS outputs. Its hysteresis (VT+ = 2.0V, VT− = 0.5–0.6V) enables robust noise immunity on slow-rising analog-like signals, while balanced propagation delays (t_PD = 1.0–9.0ns) and drive capability ensure timing predictability in feedback or oscillator circuits.

It is not a general-purpose inverter but a precision thresholding gate optimized for automotive signal integrity. Input voltage range extends to –0.5V to 6.5V independent of V_CC, and ESD protection meets AEC-Q100-002 (2kV HBM) and AEC-Q100-011 (1kV CDM) requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5V to 5.5V - Ensures compatibility with 5V automotive power rails and tolerance to battery transients.
Hysteresis Width (ΔVT)	0.35V to 1.6V - Provides noise margin against EMI in under-hood environments.
Propagation Delay (t_PD)	1.0–9.0ns @ CL=15–50pF - Enables use in clockless edge-detection and low-frequency oscillator designs.
Output Drive	±8mA @ 5.0V - Sufficient to directly drive multiple 74AHCT inputs or small LED indicators.
Operating Temperature	–40°C to +125°C ambient - Validated for engine compartment and transmission control module placement.
Input Thresholds	VT+ = 2.0V, VT− = 0.5–0.6V - Defines precise switching points for analog-sourced digital signals.
ESD Protection	2kV HBM, 1kV CDM - Meets AEC-Q100 stress test requirements for production reliability.

Pinout & Package

SOT353 (2.15mm × 2.1mm × 1.1mm, 0.65mm pitch) - ultra-compact leaded package with exposed pad-compatible footprint and moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (A)	Data Input	Inverting Schmitt-trigger input; rail-tolerant (–0.5V to 6.5V), unconnected inputs must be tied to V_CC or GND.
2 (GND)	Ground Reference	Return path for all internal logic and output current; requires low-impedance PCB connection.
3 (Y)	Data Output	Inverted, buffered output with push-pull CMOS structure; drives loads up to ±8mA.
4 (V_CC)	Power Supply	Primary supply rail (4.5–5.5V); bypass capacitor (0.1μF) recommended adjacent to pin.
5 (NC)	No Connection	Internally unconnected; must remain floating-no external tie or routing.

Key Features

Feature	Design Value
Schmitt-trigger input hysteresis	Enables reliable switching on slow, noisy signals (e.g., throttle position sensor outputs) without external RC filtering.
AEC-Q100 Grade 1 qualification	Validated for automotive applications requiring –40°C to +125°C operation and PPAP compliance.
Rail-tolerant inputs	Accepts input voltages beyond V_CC (up to 6.5V) or below GND (down to –0.5V), simplifying interface with non-5V sensors.
Low dynamic power consumption	Typical ICC = 1.35mA @ 5.5V - reduces thermal load in dense ECUs with multiple logic gates.
Lead-free & halogen-free construction	Fully RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb) and manufactured in IATF 16949-certified facilities.

Applications

Engine Control Unit Signal Conditioning

Body Control Module Switch Debouncing

Use Scenario: Cleaning analog-like crankshaft position sensor signals before MCU capture.

IC Role / Device Role / Timing Role: Schmitt-trigger inverter acting as noise-immune signal squarer and edge shaper.

Use Value: Eliminates false triggering caused by electromagnetic interference in high-voltage ignition environments.

Use Scenario: Debouncing mechanical door lock switch inputs in body control modules.

IC Role / Device Role / Timing Role: Single-gate hysteresis element converting bounce-prone switch transitions into clean logic edges.

Use Value: Reduces firmware overhead by offloading debouncing to hardware with sub-10ns response.

Transmission Control Sensor Interface

Automotive Lighting Control Logic

Use Scenario: Interfacing temperature-compensated pressure sensor outputs to TCU ADC reference clocks.

IC Role / Device Role / Timing Role: Input threshold translator ensuring consistent logic thresholds across wide temperature ranges.

Use Value: Maintains deterministic timing margins between sensor sampling and gear-shift actuation commands.

Use Scenario: Enabling fail-safe headlight dimming logic based on ambient light sensor comparator outputs.

IC Role / Device Role / Timing Role: Inverting buffer with hysteresis preventing flicker during twilight transition zones.

Use Value: Provides stable ON/OFF state retention without software polling or additional RC components.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHCT1G14DBVR	Same logic function and electrical specs; SOT-23-5 package (larger footprint, θ_JA = 184°C/W vs. 385°C/W).	Better thermal performance in high-density layouts; less space-constrained than SOT353.	Select when board layout allows larger package and lower junction-to-ambient resistance is prioritized over miniaturization.
74LVC1G14GW,125	Wider V_CC range (1.65–5.5V); lower drive (±4mA); non-automotive qualified (JEDEC only, no AEC-Q100).	Not suitable for Grade 1 automotive deployment; acceptable for industrial controls with 3.3V logic domains.	Select only for non-automotive applications where supply flexibility and cost outweigh qualification requirements.

Compared with SN74AHCT1G14DBVR and 74LVC1G14GW,125, the 74AHCT1G14QSE-7 uniquely combines AEC-Q100 Grade 1 qualification, SOT353 miniaturization, and guaranteed 5V-only drive strength-making it the sole choice for space-constrained, thermally isolated automotive signal conditioning nodes.

Availability

74AHCT1G14QSE-7 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control systems requiring stable component supply across extended temperature ranges and automotive qualification continuity.

Supply support for 74AHCT1G14QSE-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, automotive-qualified components with IATF 16949-certified production.

This part belongs to the AHCT logic family-designed specifically for 5V automotive signal integrity applications requiring Schmitt-trigger noise immunity, AEC-Q100 qualification, and compact packaging.

FAQ

What is the maximum allowable input voltage for the 74AHCT1G14QSE-7?

The absolute maximum input voltage is –0.5V to 6.5V, independent of V_CC. This rail-tolerant design allows direct interfacing with sensors or legacy systems operating outside the 4.5–5.5V supply range, such as 12V-sourced open-collector signals pulled through resistors.

Can the NC pin (Pin 5) be grounded or tied to V_CC?

No-Pin 5 is internally unconnected and must remain electrically floating. Connecting it to any potential may cause unpredictable behavior or increased leakage. The datasheet explicitly defines it as "No Connection" and provides no functional or thermal rationale for termination.

How does the hysteresis improve performance in automotive environments?

The 0.35–1.6V hysteresis window rejects high-frequency noise and slow-edge interference common in under-hood wiring harnesses. Unlike standard inverters, it prevents multiple toggles during gradual voltage transitions-critical for accurate crankshaft or camshaft position decoding in engine management systems.

Is this device suitable for use in a crystal oscillator circuit?

Yes-it is commonly used in Pierce-type oscillator configurations with quartz crystals. Its Schmitt-trigger input and low-input capacitance (10pF typical) provide the gain and phase shift needed for stable oscillation at frequencies up to several MHz, provided external load capacitors and feedback resistor are correctly sized per oscillator design guidelines.

74AHCT1G14QSE-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74AHCT

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Inverter

Number of Circuits:: 1

Number of Inputs:: 1

Features:: Schmitt Trigger

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 1.35 mA

Current - Output High, Low:: 8mA, 8mA

Input Logic Level - Low:: 0.5V ~ 0.6V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 8.5ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-353

74AHCT1G14QSE-7 FAQ

1.How can I place an order for 74AHCT1G14QSE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHCT1G14QSE-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74AHCT1G14QSE-7 reliable?

The price and inventory of 74AHCT1G14QSE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT1G14QSE-7 is usually 5 days.

3.What payment methods are accepted for 74AHCT1G14QSE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT1G14QSE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHCT1G14QSE-7?

74AHCT1G14QSE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHCT1G14QSE-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74AHCT1G14QSE-7?

For technical support, including 74AHCT1G14QSE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT1G14QSE-7 requirements.

6.How does Aetrix verify that 74AHCT1G14QSE-7 is sourced from the original manufacturer or authorized distributors?

All 74AHCT1G14QSE-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74AHCT1G14QSE-7 meets industry standards.

7.What is the process for return or replacement of 74AHCT1G14QSE-7?

All 74AHCT1G14QSE-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT1G14QSE-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74AHCT1G14QSE-7 part is unused and in its original packaging.

Return procedure for 74AHCT1G14QSE-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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