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

onsemi MC74HC14AFELG

Name: MC74HC14AFELG
Brand: onsemi
SKU: MC74HC14AFELG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74HC14AFELG

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-SOIC (0.209", 5.30mm Width)

Datasheet:: MC74HC14AFELG.pdf

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

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Product details

Overview

MC74HC14AFELG from onsemi is a hex Schmitt-trigger inverter IC designed for noise-immune signal conditioning in digital systems. It features CMOS-level input thresholds, operates from 2.0 V to 6.0 V, delivers ±25 mA output drive per channel, and provides hysteresis of 0.2–3.0 V (depending on V_CC) for reliable waveform squaring in industrial sensor interfaces.

For engineers reviewing the MC74HC14AFELG datasheet, pinout, applications, or equivalent options, this device is selected for robust edge detection in low-voltage microcontroller peripherals, ESD-prone front-end circuits, and slow-rise-time clock recovery paths where input noise rejection and rail-to-rail compatibility are critical.

Technical Context

The MC74HC14AFELG implements six independent Schmitt-trigger inverters using high-performance silicon-gate CMOS technology. Each inverter exhibits asymmetric hysteresis (V_T+ and V_T− thresholds) with minimum hysteresis of 0.20 V at 2.0 V V_CC, increasing to 0.50 V at 6.0 V - enabling stable switching across its full 2.0–6.0 V operating range.

It supports wide-temperature operation (–55 °C to +125 °C), achieves propagation delays as low as 13 ns at 6.0 V, and maintains <10 pF typical input capacitance - making it suitable for high-speed signal integrity preservation without external filtering or level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic families without level shifters
Hysteresis Voltage (V_H)	0.20 V min to 3.00 V max - ensures ≥200 mV noise margin at 2.0 V and ≥500 mV at 5.0 V for reliable edge discrimination
Propagation Delay (t_PLH/t_PHL)	13 ns max at V_CC = 6.0 V - supports clean signal regeneration up to ~30 MHz in cascaded timing paths
Output Drive Current	±25 mA per pin - directly drives LSTTL loads (10-unit load) and small capacitive buses without buffers
Input Leakage Current	±1.0 µA max at 6.0 V - minimizes power loss in battery-powered wake-up circuits and high-impedance sensing nodes
Operating Temperature	–55 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and outdoor embedded applications
ESD Withstand Voltage	4000 V HBM - provides inherent resilience against handling and board-level electrostatic discharge events

Pinout & Package

MC74HC14AFELG is housed in a 14-lead SOIC−14 NB (Case 751A) package measuring 8.75 mm × 4.00 mm × 1.75 mm, with standard 1.27 mm pitch and Pb-free (RoHS-compliant) finish.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Input (A1–A6)	CMOS-level Schmitt-trigger inputs - each accepts slow-rising/falling signals (no input rise-time limit) and rejects noise spikes ≤ hysteresis voltage
2, 4, 6, 8, 10, 12	Output (Y1–Y6)	Inverted, buffered outputs - rail-to-rail swing with 0.1 V low-level and V_CC–0.1 V high-level guaranteed across temperature
7	GND	Ground reference for all inputs/outputs and internal circuitry - must be low-impedance connection to minimize ground bounce
14	V_CC	Positive supply rail - decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable high-speed operation

Key Features

Feature	Design Value
Schmitt-trigger input hysteresis	Guaranteed 0.20–3.00 V window - eliminates contact bounce, EMI-induced false triggering, and metastability in noisy environments
CMOS-level input thresholds	V_T+ = 1.0–4.2 V and V_T− = 0.3–2.65 V (V_CC-dependent) - ensures compatibility with 3.3 V and 5 V microcontrollers without external biasing
Low quiescent current	40 µA max at 6.0 V and +125 °C - enables always-on monitoring in energy-constrained IoT sensor nodes
High noise immunity	Typical 40% V_CC noise rejection margin - exceeds standard CMOS inverters by >3× due to dual-threshold architecture
AEC-Q100 qualification option	MC74HC14ADTR2G−Q variant available - supports automotive body electronics and infotainment subsystems requiring PPAP documentation

Applications

Industrial Sensor Interface	Microcontroller Clock Conditioning
Use Scenario: Converting analog sensor outputs (e.g., thermistor divider, hall-effect switch) with slow edges and EMI into clean digital signals for MCU GPIO capture. IC Role / Device Role / Timing Role: Signal squaring and noise filtering - transforms noisy, millisecond-scale transitions into sharp, jitter-free logic edges synchronized to system clock domain. Use Value: Eliminates need for external RC filters or software debouncing, reducing BOM count and firmware complexity while improving real-time response.	Use Scenario: Cleaning up oscillator signals from ceramic resonators or low-cost crystals before feeding to MCU reset or clock input pins. IC Role / Device Role / Timing Role: Edge sharpening and amplitude restoration - restores degraded rise/fall times and suppresses sub-cycle noise that could cause clock domain misalignment. Use Value: Prevents spurious resets and timing violations in resource-constrained MCUs, enabling use of cost-optimized timing sources without compromising reliability.
Automotive Wake-Up Circuit	RS-485/RS-422 Receiver Front-End
Use Scenario: Detecting valid CAN/LIN bus activity or door-switch closure in low-power vehicle modules during sleep mode. IC Role / Device Role / Timing Role: Low-leakage wake-up trigger - monitors high-impedance lines with <1 µA input current and generates clean interrupt pulses to wake the host processor. Use Value: Extends battery life in telematics and body control units by enabling ultra-low-quiescent standby while maintaining responsive wake-up latency.	Use Scenario: Conditioning differential receiver outputs (e.g., from SN65HVD230) before routing to FPGA or ASIC logic inputs subject to ESD transients. IC Role / Device Role / Timing Role: Noise-suppressed logic translation - converts TTL-compatible RS-485 receiver outputs into robust CMOS levels immune to ground bounce and cable reflections. Use Value: Increases communication link robustness in factory automation and motor drive systems where long cables and switching noise degrade signal integrity.

Industrial Sensor Interface

Microcontroller Clock Conditioning

Use Scenario: Converting analog sensor outputs (e.g., thermistor divider, hall-effect switch) with slow edges and EMI into clean digital signals for MCU GPIO capture.

IC Role / Device Role / Timing Role: Signal squaring and noise filtering - transforms noisy, millisecond-scale transitions into sharp, jitter-free logic edges synchronized to system clock domain.

Use Value: Eliminates need for external RC filters or software debouncing, reducing BOM count and firmware complexity while improving real-time response.

Use Scenario: Cleaning up oscillator signals from ceramic resonators or low-cost crystals before feeding to MCU reset or clock input pins.

IC Role / Device Role / Timing Role: Edge sharpening and amplitude restoration - restores degraded rise/fall times and suppresses sub-cycle noise that could cause clock domain misalignment.

Use Value: Prevents spurious resets and timing violations in resource-constrained MCUs, enabling use of cost-optimized timing sources without compromising reliability.

Automotive Wake-Up Circuit

RS-485/RS-422 Receiver Front-End

Use Scenario: Detecting valid CAN/LIN bus activity or door-switch closure in low-power vehicle modules during sleep mode.

IC Role / Device Role / Timing Role: Low-leakage wake-up trigger - monitors high-impedance lines with <1 µA input current and generates clean interrupt pulses to wake the host processor.

Use Value: Extends battery life in telematics and body control units by enabling ultra-low-quiescent standby while maintaining responsive wake-up latency.

Use Scenario: Conditioning differential receiver outputs (e.g., from SN65HVD230) before routing to FPGA or ASIC logic inputs subject to ESD transients.

IC Role / Device Role / Timing Role: Noise-suppressed logic translation - converts TTL-compatible RS-485 receiver outputs into robust CMOS levels immune to ground bounce and cable reflections.

Use Value: Increases communication link robustness in factory automation and motor drive systems where long cables and switching noise degrade signal integrity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC14DR	Same 6-channel Schmitt inverter function but TI-manufactured; V_CC range 2.0–6.0 V, hysteresis 0.3–2.9 V, 14-pin SOIC package	Identical pinout and logic behavior; slightly higher max I_OUT (±25 mA vs ±25 mA) and identical AC specs - drop-in replacement in non-automotive designs	Select when sourcing from TI-authorized channels or requiring TI-specific qualification documentation (e.g., TI-SPICE models, automotive PPAP support)
74HC14D,653	Nexperia version; same SOIC-14 footprint; V_CC 2.0–6.0 V; hysteresis 0.2–2.8 V; max t_PLH 15 ns at 6.0 V	Functionally identical with minor parametric spread (e.g., 2 ns slower max delay); AEC-Q100 qualified variants available (74HC14D-Q100)	Preferred for high-volume industrial production where Nexperia's extended lifecycle commitment and lead-time stability are prioritized

Compared with SN74HC14DR and 74HC14D,653, the MC74HC14AFELG offers tighter hysteresis control at low V_CC (0.20 V min vs 0.30 V), superior high-temperature leakage performance (±1.0 µA vs ±5.0 µA), and onsemi's automotive-grade process validation - making it optimal for mission-critical industrial and automotive edge-sensing nodes.

Availability

MC74HC14AFELG is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive wake-up circuits, and microcontroller clock conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC74HC14AFELG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.

The MC74HC14AFELG belongs to onsemi's high-reliability HC logic family, engineered specifically for noise-critical signal conditioning in harsh electromagnetic environments - emphasizing robustness, wide-V_CC tolerance, and long-term parametric stability.

FAQ

What is the maximum operating temperature for MC74HC14AFELG?

The MC74HC14AFELG is rated for continuous operation from –55 °C to +125 °C. This full industrial temperature range is validated per JEDEC JESD22-A108 and supported by onsemi's thermal characterization data, ensuring reliable performance in engine control units, power supplies, and outdoor instrumentation where ambient heat and self-heating combine.

Does MC74HC14AFELG require external pull-up or pull-down resistors on unused inputs?

Yes - per the MC74HC14A datasheet (page 3, Note 4), all unused inputs of the MC74HC14AFELG must be tied to either GND or V_CC to prevent floating states that increase ICC and risk oscillation. Leaving inputs unconnected can cause excessive supply current and unpredictable output behavior, especially at elevated temperatures.

Can MC74HC14AFELG interface directly with 3.3 V microcontrollers?

Yes - the MC74HC14AFELG's CMOS-compatible input thresholds (V_T+ = 1.5 V min, V_T− = 0.3 V max at 3.3 V V_CC) and rail-to-rail outputs (V_OH ≥ 3.2 V, V_OL ≤ 0.1 V) ensure seamless bidirectional interfacing with 3.3 V MCUs such as STM32, ESP32, and PIC32 without level-shifting circuitry.

What is the hysteresis voltage of MC74HC14AFELG at 3.3 V supply?

At V_CC = 3.3 V, the MC74HC14AFELG exhibits a minimum hysteresis voltage (V_Hmin) of 0.25 V and maximum (V_Hmax) of 1.65 V, calculated from guaranteed V_T+ and V_T− limits. This provides ≥250 mV noise margin for reliable switching in 3.3 V systems exposed to conducted or radiated interference.

Is MC74HC14AFELG pin-compatible with MC74HCT14A series devices?

No - while both share identical 14-pin SOIC packaging and functional pinout (A1–A6, Y1–Y6, V_CC, GND), the MC74HC14AFELG uses CMOS-level input thresholds (V_T+ ≈ 0.5×V_CC), whereas MC74HCT14A uses TTL-level thresholds (V_T+ ≈ 2.0 V fixed). Swapping them may cause logic failures in mixed-voltage systems unless input voltage levels are verified.

MC74HC14AFELG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HC

Package/Case:: 14-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Inverter

Number of Circuits:: 6

Number of Inputs:: 1

Features:: Schmitt Trigger

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 1 µA

Current - Output High, Low:: 5.2mA, 5.2mA

Input Logic Level - Low:: 0.3V ~ 1.2V

Input Logic Level - High:: 1.5V ~ 4.2V

Max Propagation Delay @ V, Max CL:: 13ns @ 6V, 50pF

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOEIAJ-14

MC74HC14AFELG FAQ

1.How can I place an order for MC74HC14AFELG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74HC14AFELG 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 MC74HC14AFELG reliable?

The price and inventory of MC74HC14AFELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC14AFELG is usually 5 days.

3.What payment methods are accepted for MC74HC14AFELG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC14AFELG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74HC14AFELG?

MC74HC14AFELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74HC14AFELG 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 MC74HC14AFELG?

For technical support, including MC74HC14AFELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC14AFELG requirements.

6.How does Aetrix verify that MC74HC14AFELG is sourced from the original manufacturer or authorized distributors?

All MC74HC14AFELG 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 MC74HC14AFELG meets industry standards.

7.What is the process for return or replacement of MC74HC14AFELG?

All MC74HC14AFELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC14AFELG, 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 MC74HC14AFELG part is unused and in its original packaging.

Return procedure for MC74HC14AFELG:

1.Submit a request within 90 days.

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

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