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

Nexperia USA Inc. 74HCT14D,653

Name: 74HCT14D,653
Brand: Nexperia USA Inc.
SKU: 74HCT14D,653
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT14D,653

Manufacturer:: Nexperia USA Inc.

Category:: Gates and Inverters

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: 74HCT14D,653.pdf

Description:: IC INVERT SCHMITT 6CH 1-INP 14SO

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Product details

Overview

74HCT14D,653 from Nexperia is a hex inverting Schmitt trigger IC designed for noise-immune signal conditioning in TTL-level interfacing applications. It operates from 4.5 V to 5.5 V, delivers 4.0 mA output drive at V_CC = 4.5 V, exhibits 20 ns typical propagation delay, and supports industrial temperature range (–40 °C to +125 °C) in SO14 package - used in waveform shaping and relaxation oscillator circuits.

For engineers reviewing the 74HCT14D,653 datasheet, 74HCT14D,653 pinout, 74HCT14D,653 application, or 74HCT14D,653 equivalent, this page provides verified functional identity, validated SO14 pin mapping, confirmed Schmitt-trigger transfer characteristics (V_T+ = 1.41 V, V_T− = 0.85 V at V_CC = 4.5 V), and real-world use cases in pulse generation and multivibrator timing circuits.

Technical Context

This device implements six independent CMOS inverters with hysteresis-enabled Schmitt-trigger inputs, enabling clean digital output transitions from slow-rising or noisy analog-like inputs. Its input threshold levels are optimized for TTL compatibility (V_T+ ≈ 1.4 V, V_T− ≈ 0.9 V at 4.5 V), and it includes integrated clamp diodes for overvoltage-tolerant interfacing.

The logic function is strictly inverting: each input-output pair satisfies L→H and H→L truth table behavior with defined hysteresis (ΔV = ~0.56 V). Dynamic performance is characterized under 50 pF load, with t_pd = 20–34 ns and t_t = 7–15 ns across V_CC = 4.5–5.5 V and temperature extremes.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	4.5 V to 5.5 V - ensures reliable operation with standard 5 V TTL/CMOS systems and tolerance against rail droop.
Input threshold (V_T+)	1.41 V (typ) at V_CC = 4.5 V - enables robust recognition of TTL HIGH (≥2.0 V) without false triggering.
Input threshold (V_T−)	0.85 V (typ) at V_CC = 4.5 V - provides 0.56 V hysteresis to reject noise on slowly varying signals.
Output drive (I_OH/I_OL)	±4.0 mA at V_CC = 4.5 V - sufficient to drive multiple 74-series inputs or small capacitive loads directly.
Propagation delay	20 ns (typ) at V_CC = 4.5 V, CL = 50 pF - supports reliable operation up to ~25 MHz in non-critical timing paths.
Operating temperature	–40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O, and high-reliability embedded control.
ESD protection	HBM >2000 V, CDM >1000 V - reduces risk of field failure during handling and board assembly.

Pinout & Package

74HCT14D,653 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads and 3.9 mm body width. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Data input (1A–6A)	Schmitt-triggered inverter inputs - accept slow or noisy signals; clamp diodes allow safe interfacing above V_CC.
2, 4, 6, 8, 10, 12	Data output (1Y–6Y)	Inverted outputs with CMOS rail-to-rail swing - drive downstream logic or RC timing networks directly.
7	GND	Ground reference (0 V) - must be low-impedance connection to minimize switching noise coupling.
14	V_CC	Positive supply (4.5–5.5 V) - requires local 100 nF ceramic decoupling adjacent to pin 14.

Key Features

Feature	Design Value
TTL-compatible input thresholds	V_T+ = 1.41 V, V_T− = 0.85 V at 4.5 V - eliminates need for level-shifting when interfacing legacy 5 V TTL sources.
Input clamp diodes	Integrated anode-to-GND and cathode-to-V_CC diodes - permit use of series current-limiting resistors for inputs up to 7 V.
Unlimited input rise/fall times	No minimum edge rate requirement - enables direct use with RC-generated ramps, thermistor outputs, or mechanical switch debouncing.
Latch-up immunity	Exceeds 100 mA per JESD78 Class II Level B - prevents destructive parasitic thyristor activation under transient overvoltage.
Wide temperature range	Specified from –40 °C to +125 °C - supports deployment in engine control units, motor drives, and outdoor industrial gateways.

Applications

Waveform Shaping

Astable Multivibrator

Use Scenario: Converting distorted or slow-rising sensor outputs (e.g., from photodiodes or potentiometers) into clean square waves for microcontroller capture.

IC Role / Device Role / Timing Role: Six independent Schmitt inverters condition analog edges into jitter-free digital transitions with fixed hysteresis.

Use Value: Eliminates external comparators and hysteresis resistors; reduces BOM count and layout area while maintaining timing predictability.

Use Scenario: Generating precise clock signals for LED flashers, tone generators, or system watchdog timers using only two inverters and RC components.

IC Role / Device Role / Timing Role: Inverter pair forms feedback loop with RC network; Schmitt thresholds define stable oscillation frequency (f ≈ 1/(1.2RC)).

Use Value: Enables self-contained, low-cost oscillation without crystals or dedicated timer ICs - ideal for cost-sensitive consumer electronics.

Monostable Multivibrator

Pulse Edge Detection

Use Scenario: Creating fixed-duration pulses from momentary switch closures or asynchronous event triggers in industrial control panels.

IC Role / Device Role / Timing Role: One inverter plus RC network generates single-shot output with width determined by R×C and Schmitt thresholds.

Use Value: Provides deterministic pulse width (±5% over temperature) without software overhead - critical for hardware-based safety interlocks.

Use Scenario: Detecting rising/falling edges of irregular signals (e.g., encoder quadrature, relay bounce) for interrupt-driven microcontroller response.

IC Role / Device Role / Timing Role: Two cascaded inverters with RC differentiation generate narrow strobes synchronized to input transitions.

Use Value: Converts slow mechanical transitions into sub-100 ns digital pulses - enables reliable edge counting and debounce in real-time firmware.

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
74HC14D,653	CMOS logic family; V_CC = 2.0–6.0 V; V_T+ = 4.4 V (at 4.5 V) - higher thresholds require stronger drive for TTL compatibility.	Better suited for mixed-voltage systems where 3.3 V or 2.5 V supplies coexist with 5 V domains.	Select when operating below 4.5 V or needing wider supply flexibility; verify input drive strength matches source.
SN74LV14APWR	Texas Instruments LV family; V_CC = 2.0–5.5 V; V_T+ = 1.4 V (typ); lower ICC (1 μA max) but reduced output drive (±6 mA).	Preferred for ultra-low-power battery-operated devices where static current dominates budget.	Choose for portable instrumentation or IoT sensors requiring <10 μA quiescent current; confirm load capacitance stays ≤30 pF.

Compared with 74HC14D,653 and SN74LV14APWR, the 74HCT14D,653 uniquely balances TTL-level compatibility, industrial temperature resilience, and moderate power-efficiency - making it optimal for automotive body controllers and industrial I/O modules where signal integrity and ruggedness are prioritized over minimal ICC.

Availability

74HCT14D,653 is available at Aetrix Electronics and suitable for waveform shaping, multivibrator timing, and edge detection applications requiring stable component supply across automotive, industrial automation, and test equipment programs.

Supply support for 74HCT14D,653 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 - serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74HCT14D,653 belongs to Nexperia's industry-standard 74HCT logic family, engineered specifically for seamless interoperability with legacy TTL systems while delivering CMOS power efficiency and noise immunity in harsh environments.

FAQ

What is the maximum recommended input voltage for 74HCT14D,653 when V_CC = 5.0 V?

The absolute maximum input voltage is V_CC + 0.5 V = 5.5 V, per limiting values table. However, sustained operation above V_CC requires external current-limiting resistors to keep input clamping current within ±20 mA. Inputs tolerate up to 7 V only with appropriate series resistance - e.g., ≥330 Ω for 12 V transients.

Can 74HCT14D,653 drive a 50 pF capacitive load at 10 MHz without signal degradation?

Yes: at V_CC = 4.5 V and T_A = 25 °C, t_pd = 20 ns and t_t = 7 ns into 50 pF, yielding usable bandwidth >25 MHz. Rise/fall times remain monotonic with no overshoot due to CMOS output structure - verified in dynamic characteristics Table 7 and Fig. 4.

How does the hysteresis voltage (V_H) change across temperature for 74HCT14D,653?

V_H = V_T+ − V_T− is 0.56 V (typ) at 25 °C and remains stable from –40 °C to +125 °C, with min/max bounds of 0.4 V to 1.2 V per Table 10. This stability ensures consistent noise margin across full industrial temperature range without recalibration.

Is 74HCT14D,653 pin-compatible with older 74LS14 devices in SO14 packages?

Yes: both use identical SO14 (SOT108-1) footprint and pinout (1A–6A, 1Y–6Y, GND, V_CC). However, 74HCT14D,653 draws significantly less quiescent current (<2 μA vs. ~10 mA for 74LS14) and offers higher noise immunity - enabling direct drop-in replacement in most legacy designs with improved power and reliability.

74HCT14D,653 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

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-SO

74HCT14D,653 FAQ

1.How can I place an order for 74HCT14D,653 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT14D,653 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 74HCT14D,653 reliable?

The price and inventory of 74HCT14D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT14D,653 is usually 5 days.

3.What payment methods are accepted for 74HCT14D,653?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT14D,653 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT14D,653?

74HCT14D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT14D,653 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 74HCT14D,653?

For technical support, including 74HCT14D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT14D,653 requirements.

6.How does Aetrix verify that 74HCT14D,653 is sourced from the original manufacturer or authorized distributors?

All 74HCT14D,653 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 74HCT14D,653 meets industry standards.

7.What is the process for return or replacement of 74HCT14D,653?

All 74HCT14D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT14D,653, 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 74HCT14D,653 part is unused and in its original packaging.

Return procedure for 74HCT14D,653:

1.Submit a request within 90 days.

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

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