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

Nexperia USA Inc. 74HCT14BQ,115

Name: 74HCT14BQ,115
Brand: Nexperia USA Inc.
SKU: 74HCT14BQ,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT14BQ,115

Manufacturer:: Nexperia USA Inc.

Category:: Gates and Inverters

Package:: 14-VFQFN Exposed Pad

Datasheet:: 74HCT14BQ,115.pdf

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

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Product details

Overview

74HCT14BQ,115 from Nexperia is a hex inverting Schmitt trigger IC designed for noise-immune signal conditioning in digital systems. It operates from 4.5 V to 5.5 V, delivers 4.0 mA output drive at V_CC = 4.5 V, features TTL-compatible input thresholds (V_T+ = 1.41 V typ, V_T− = 0.85 V typ), and supports −40 °C to +125 °C industrial temperature range. It is used in waveform shaping circuits where slow or noisy inputs require clean, jitter-free inversion.

For engineers reviewing the 74HCT14BQ,115 datasheet, 74HCT14BQ,115 pinout, 74HCT14BQ,115 application, or 74HCT14BQ,115 equivalent, this page provides verified functional identity, DHVQFN14 package mapping, confirmed Schmitt-trigger transfer characteristics, real-world multivibrator timing behavior, and validated alternatives with documented electrical and application differences.

Technical Context

The 74HCT14BQ,115 implements six independent inverting Schmitt triggers with hysteresis (V_H = 0.56 V typ at V_CC = 4.5 V), enabling robust rejection of input noise and reliable oscillation in relaxation circuits. Its TTL-compatible input thresholds (1.2–1.9 V for V_T+, 0.5–1.2 V for V_T−) ensure interoperability with legacy 5 V logic families without level shifting.

Each gate exhibits propagation delay of 20–34 ns (V_CC = 4.5 V, C_L = 50 pF), transition time of 7–15 ns, and low static supply current (2.0 μA typ, ≤40 μA max over full temperature range). Input clamp diodes allow safe interfacing to voltages exceeding V_CC when used with current-limiting resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Hex inverting Schmitt trigger - provides six independent gates with hysteresis for noise suppression and waveform sharpening
Supply Voltage Range	4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and mixed-voltage systems
Input Thresholds (V_T+/V_T−)	1.41 V / 0.85 V typ at V_CC = 4.5 V - enables reliable switching with TTL-level signals and rejects sub-threshold noise
Output Drive Current	±4.0 mA - sufficient to drive multiple 74-series inputs or small capacitive loads without buffering
Propagation Delay	20–34 ns (V_CC = 4.5 V, C_L = 50 pF) - defines maximum operating frequency in oscillator and timing applications
Operating Temperature	−40 °C to +125 °C - qualified for under-hood automotive, industrial control, and extended-temperature embedded systems
ESD Protection	HBM >2000 V, CDM >1000 V - reduces risk of handling damage during PCB assembly and rework

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, no leads, exposed thermal pad (non-electrical, optional GND connection), 14 terminals, pin 1 index area marked on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Input (1A–6A)	Schmitt-trigger inputs - accept slow-rising/falling signals and convert them to clean digital edges
2, 4, 6, 8, 10, 12	Output (1Y–6Y)	Inverted outputs - each mirrors its corresponding input with hysteresis and defined VOH/VOL levels
7	GND	Ground reference - must be connected to system 0 V plane for stable operation and noise immunity
14	V_CC	Positive supply - powers all six gates; decoupling capacitor (100 nF) required near pin 14

Key Features

Feature	Design Value
TTL-compatible input thresholds	Enables direct interface with 5 V microcontrollers, sensors, and legacy logic without level shifters
Unlimited input rise/fall times	Supports RC-generated waveforms and mechanical switch debouncing without timing constraints
Clamp diodes on all inputs	Allows safe connection to voltages up to V_CC + 0.5 V using series current-limiting resistors
High noise immunity (hysteresis)	0.56 V typical hysteresis at 4.5 V supply prevents false triggering from EMI or crosstalk
Thermally enhanced DHVQFN	0.85 mm profile and exposed pad enable efficient heat dissipation in high-density layouts

Applications

Waveform Shaping

Astable Multivibrator

Use Scenario: Converting noisy or slowly varying analog sensor outputs (e.g., thermistor divider, potentiometer wiper) into clean square waves for microcontroller edge detection.

IC Role / Device Role / Timing Role: Inverting Schmitt trigger gate acting as threshold comparator with built-in hysteresis to eliminate chatter and bounce.

Use Value: Eliminates need for external op-amps or RC filters; single gate provides deterministic switching points (V_T+/V_T−) and sharp output transitions.

Use Scenario: Generating fixed-frequency clock signals for LED flashers, tone generators, or simple timing intervals in cost-sensitive consumer electronics.

IC Role / Device Role / Timing Role: Two cascaded gates forming a feedback loop with external R-C network to produce continuous oscillation.

Use Value: Achieves stable frequency (e.g., ~1 kHz with 10 kΩ/100 nF) using only one IC and two passive components-no external crystal or dedicated timer IC required.

Monostable Multivibrator

Switch Debouncing

Use Scenario: Creating precise, repeatable pulse widths (e.g., 10–100 ms) for microcontroller wake-up signals or actuator enable pulses in industrial controls.

IC Role / Device Role / Timing Role: Single gate configured with RC timing network to generate a fixed-duration output pulse upon input edge detection.

Use Value: Provides consistent pulse width independent of input rise time; eliminates software-based timing loops and associated CPU overhead.

Use Scenario: Cleaning mechanical switch contacts (pushbuttons, rotary encoders) before feeding signals to FPGA I/O banks or MCU GPIOs.

IC Role / Device Role / Timing Role: Gate accepting raw switch signal and delivering glitch-free, bounce-free digital output via hysteresis and propagation delay filtering.

Use Value: Removes contact bounce without firmware polling or RC+MCU filtering; guarantees single-edge response per press with <34 ns worst-case delay.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT14DR	SOIC-14 package (3.9 mm width); higher thermal resistance (10.1 mW/K derating above 100 °C); identical electrical specs	Better suited for through-hole prototyping or low-density boards where QFN rework is impractical	Select when manual soldering, test fixture compatibility, or legacy footprint reuse is required
74LVC14ABQ,115	Lower V_CC range (1.65–5.5 V); CMOS thresholds (not TTL-compatible); 24 mA drive; smaller hysteresis (0.3 V typ)	Preferred in battery-powered or multi-rail systems needing 3.3 V operation, but incompatible with 5 V TTL inputs	Select only if supply voltage is ≤3.3 V and input sources are CMOS-not for 5 V TTL interfacing

Compared with SN74HCT14DR and 74LVC14ABQ,115, the 74HCT14BQ,115 uniquely combines TTL-level input compatibility, DHVQFN thermal performance, and industrial temperature rating-making it optimal for space-constrained 5 V systems requiring noise resilience and long-term reliability.

Availability

74HCT14BQ,115 is available at Aetrix Electronics and suitable for waveform shapers, astable/monostable multivibrators, and mechanical switch debouncing circuits requiring stable component supply across automotive, industrial control, and embedded instrumentation programs.

Supply support for 74HCT14BQ,115 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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HCT14BQ,115 belongs to Nexperia's industry-standard 74HCT logic family, engineered specifically for robust 5 V TTL interoperability, wide temperature operation, and board-level noise immunity in mission-critical embedded systems.

FAQ

Can 74HCT14BQ,115 operate at 3.3 V?

No. The 74HCT14BQ,115 is specified only for 4.5 V to 5.5 V operation per its recommended conditions table. At 3.3 V, input thresholds fall outside TTL compatibility range and output drive degrades significantly. For 3.3 V systems, use 74LVC14ABQ,115 instead, which has CMOS thresholds and 1.65–5.5 V support.

Is the exposed thermal pad on the DHVQFN package electrically connected?

No. The exposed pad (terminal 1 index area) is not electrically tied to any internal node. Per Nexperia's datasheet, it has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or be connected to GND-never to V_CC or signal nets.

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

The 74HCT14BQ,115 is characterized with C_L = 50 pF in dynamic testing. While it can drive larger loads, propagation delay increases linearly beyond that point (e.g., ~51 ns at 100 pF, V_CC = 4.5 V). For loads >75 pF, add a buffer stage or reduce trace length to maintain timing integrity.

How does input hysteresis improve noise immunity in practice?

Hysteresis creates separate turn-on (V_T+ ≈ 1.41 V) and turn-off (V_T− ≈ 0.85 V) thresholds-resulting in 0.56 V voltage margin. This prevents multiple output transitions when input noise or EMI causes the signal to hover near a single threshold, ensuring one clean edge per intended input event.

74HCT14BQ,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 14-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Inverter

Number of Circuits:: 6

Number of Inputs:: 1

Features:: Schmitt Trigger

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 2 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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-DHVQFN (2.5x3)

74HCT14BQ,115 FAQ

1.How can I place an order for 74HCT14BQ,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT14BQ,115 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 74HCT14BQ,115 reliable?

The price and inventory of 74HCT14BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT14BQ,115 is usually 5 days.

3.What payment methods are accepted for 74HCT14BQ,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT14BQ,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT14BQ,115?

74HCT14BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT14BQ,115 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 74HCT14BQ,115?

For technical support, including 74HCT14BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT14BQ,115 requirements.

6.How does Aetrix verify that 74HCT14BQ,115 is sourced from the original manufacturer or authorized distributors?

All 74HCT14BQ,115 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 74HCT14BQ,115 meets industry standards.

7.What is the process for return or replacement of 74HCT14BQ,115?

All 74HCT14BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT14BQ,115, 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 74HCT14BQ,115 part is unused and in its original packaging.

Return procedure for 74HCT14BQ,115:

1.Submit a request within 90 days.

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

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