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

Diodes Incorporated 74HCT14T14-13

Name: 74HCT14T14-13
Brand: Diodes Incorporated
SKU: 74HCT14T14-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT14T14-13

Manufacturer:: Diodes Incorporated

Category:: Gates and Inverters

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74HCT14T14-13.pdf

Description:: IC INVERTER 6CH 1-INP 14TSSOP

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Product details

Overview

74HCT14T14-13 from Diodes Incorporated is a hex Schmitt-trigger inverter IC in TSSOP-14 package, designed for noise-immune digital signal conditioning in 5V logic systems. It delivers six independent inverters with hysteresis (ΔVT = 0.4V at 4.5V), 4mA output drive capability, and operates across -40°C to +125°C ambient temperature - used in PC motherboard reset conditioning and USB peripheral power sequencing.

For engineers reviewing the 74HCT14T14-13 datasheet, 74HCT14T14-13 pinout, 74HCT14T14-13 application, or 74HCT14T14-13 equivalent, key selection criteria include input hysteresis width, propagation delay (max 51ns at 4.5V), output drive strength under 4mA load, and compatibility with TTL-level inputs in mixed-logic industrial control interfaces.

Technical Context

This device implements six identical CMOS-based Schmitt-trigger inverters using HCT (High-Speed CMOS TTL-compatible) process technology. Each gate features asymmetric input thresholds (VT+ = 2.1V, VT− = 0.6V at VCC = 5.5V), enabling robust noise rejection on slow-rising or noisy signals such as mechanical switch debouncing or analog sensor interface outputs.

It operates strictly within 4.5V–5.5V supply range and exhibits rail-to-rail output swing (VOH ≥ 3.70V, VOL ≤ 0.4V at 4mA load). Input clamp current rating (±20mA) and ESD protection (2kV HBM, 1kV CDM) support direct interfacing with external sensors or front-panel controls without external protection circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	4.5V to 5.5V - ensures stable operation across standard 5V ±10% rails in industrial and computing applications
Hysteresis Width (ΔVT)	0.4V at both 4.5V and 5.5V - provides fixed noise margin for reliable edge detection on slow or noisy inputs
Propagation Delay (tPD)	Max 51ns at VCC = 4.5V, CL = 50pF - defines maximum timing uncertainty in clock or control signal inversion paths
Output Drive (IOL/IOH)	±4mA at VCC = 4.5V - supports direct fan-out to up to two standard LS-TTL inputs or LED indicators
Input Voltage Compatibility	TTL-level (0.8V/2.0V thresholds) - enables seamless integration into legacy 5V logic systems without level-shifting
ESD Protection	2kV HBM, 1kV CDM - meets IEC 61000-4-2 pre-compliance for board-level handling and field deployment

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package, 4.4mm × 5.0mm body, 0.65mm pitch) with exposed pad not electrically connected; JEDEC MO-153 compliant; thermal resistance θJA ≈ 160°C/W (typical, no heatsink).

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Input (1A–6A)	Individual Schmitt-trigger inputs - each accepts TTL-compatible voltage levels and provides hysteresis for noise immunity
2, 4, 6, 8, 10, 12	Output (1Y–6Y)	Inverted push-pull outputs - deliver full rail-swing logic levels with ±4mA drive capability per gate
7	GND	Ground reference for all internal circuitry and output stages - must be low-impedance connection to minimize ground bounce
14	VCC	Positive supply terminal - requires local 100nF ceramic decoupling capacitor placed within 5mm of pin

Key Features

Feature	Design Value
Schmitt-trigger inputs per gate	Enables clean digital reconstruction of slow or noisy analog waveforms (e.g., thermistor-based temperature monitoring signals)
CMOS low-power consumption	ICC ≤ 40μA at VCC = 6.0V - reduces static power in always-on system management functions
Pin-compatible with LSTTL	Direct replacement for 74LS14 in existing designs without PCB or firmware changes
RoHS-compliant & halogen-free	Meets EU Directive 2011/65/EU with Br+Cl < 1500ppm and Sb < 1000ppm - supports green manufacturing requirements

Applications

PC Power-On Reset Conditioning

USB Peripheral Port Enable Sequencing

Use Scenario: Debounces mechanical power button press and generates clean reset pulse to CPU upon system boot.

IC Role / Device Role / Timing Role: Signal conditioner converting noisy front-panel switch closure into monotonic, glitch-free active-low reset assertion.

Use Value: Eliminates need for external RC network and comparator; hysteresis prevents chatter-induced false resets during button press/release transitions.

Use Scenario: Controls enable timing of USB hub downstream ports after host controller initialization completes.

IC Role / Device Role / Timing Role: Inverting delay element synchronizing port power-up with enumeration readiness signal from USB controller.

Use Value: Ensures strict compliance with USB 2.0 specification tPU (port power-up) timing window via predictable propagation delay and rail-to-rail output swing.

Industrial Sensor Interface Buffering

Legacy Parallel Printer Data Line Noise Suppression

Use Scenario: Interfaces thermocouple amplifier output to microcontroller ADC input where signal slew rate is < 0.2V/ms.

IC Role / Device Role / Timing Role: Threshold translator converting slow analog voltage ramp into clean digital flag indicating temperature threshold crossing.

Use Value: Provides deterministic switching point (VT+ = 2.1V, VT− = 0.6V) independent of input rise/fall time - critical for repeatable overtemperature detection.

Use Scenario: Cleans up marginal data lines from aging parallel printer controllers prone to ringing and crosstalk.

IC Role / Device Role / Timing Role: Digital line receiver restoring degraded TTL-level data pulses before latching by printer controller ASIC.

Use Value: Restores signal integrity without adding propagation delay skew across 8-bit data bus - maintains parallel timing budget.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT14DR	SOIC-14 package; identical electrical specs but 1.27mm lead pitch vs. TSSOP's 0.65mm	Better suited for through-hole prototyping or legacy PCBs with larger pad spacing	Select when board layout lacks fine-pitch routing capability or reflow profile doesn't support TSSOP
MC74HCT14ADTR2G	Same TSSOP-14 footprint; slightly higher ICC (max 50μA) and wider hysteresis tolerance (±0.05V)	Validated for automotive AEC-Q100 Grade 2 (−40°C to +105°C), not extended temp	Choose for automotive infotainment modules requiring qualified components but no extended temperature range

Compared with SN74HCT14DR and MC74HCT14ADTR2G, the 74HCT14T14-13 offers optimal trade-off between high-density packaging, full industrial temperature support (−40°C to +125°C), and guaranteed hysteresis stability - making it preferred for space-constrained embedded controllers and industrial automation I/O modules.

Availability

74HCT14T14-13 is available at Aetrix Electronics and suitable for PC motherboard design, USB peripheral development, and industrial sensor interface circuits requiring stable component supply across long production lifecycles.

Supply support for 74HCT14T14-13 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 integrated circuits, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The 74HCT logic family targets cost-sensitive, high-volume 5V digital systems requiring TTL compatibility, low static power, and robust noise immunity - especially in legacy infrastructure upgrades and mixed-technology board designs.

FAQ

Can 74HCT14T14-13 operate at 3.3V supply?

No. The device is specified only for 4.5V to 5.5V operation. At 3.3V, input thresholds become undefined, hysteresis collapses, and output drive falls below guaranteed levels. For 3.3V systems, use 74LVC14 or 74AHC14 instead - both offer compatible Schmitt-trigger functionality with 3.3V-rated performance.

What is the maximum capacitive load this device can drive reliably?

It is characterized up to 50pF load capacitance with guaranteed timing (tPD ≤ 51ns, tt ≤ 22ns). Driving >50pF may increase propagation delay nonlinearly and risk output waveform degradation. For loads >75pF, add a series resistor (22–47Ω) near the output to dampen ringing and maintain signal integrity.

Are unused inputs required to be terminated?

Yes. Per datasheet Note 6, all unused inputs must be tied to either VCC or GND. Floating inputs cause increased ICC, potential oscillation, and elevated junction temperature due to indeterminate internal node states - risking functional failure or accelerated wear-out in long-life applications.

Does this part support hot-swap insertion?

No. The 74HCT14T14-13 lacks hot-swap protection features such as power-up sequencing control, Ioff protection, or back-drive immunity. Applying VCC before establishing proper GND connection or inserting while powered may exceed absolute maximum ratings (e.g., VI > VCC + 0.5V), causing latch-up or permanent damage.

74HCT14T14-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74HCT

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Inverter

Number of Circuits:: 6

Number of Inputs:: 1

Features:: Schmitt Trigger Input

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 20 µA

Current - Output High, Low:: 4mA, 4mA

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

Input Logic Level - High:: 1.9V ~ 2.1V

Max Propagation Delay @ V, Max CL:: 34ns @ 4.5V, 50pF

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

74HCT14T14-13 FAQ

1.How can I place an order for 74HCT14T14-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT14T14-13 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 74HCT14T14-13 reliable?

The price and inventory of 74HCT14T14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT14T14-13 is usually 5 days.

3.What payment methods are accepted for 74HCT14T14-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT14T14-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT14T14-13?

74HCT14T14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT14T14-13 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 74HCT14T14-13?

For technical support, including 74HCT14T14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT14T14-13 requirements.

6.How does Aetrix verify that 74HCT14T14-13 is sourced from the original manufacturer or authorized distributors?

All 74HCT14T14-13 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 74HCT14T14-13 meets industry standards.

7.What is the process for return or replacement of 74HCT14T14-13?

All 74HCT14T14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT14T14-13, 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 74HCT14T14-13 part is unused and in its original packaging.

Return procedure for 74HCT14T14-13:

1.Submit a request within 90 days.

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

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