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

onsemi MC74HCU04AD

Name: MC74HCU04AD
Brand: onsemi
SKU: MC74HCU04AD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74HCU04AD

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: MC74HCU04AD.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC74HCU04AD from onsemi is a high-performance silicon-gate CMOS hex unbuffered inverter IC, providing six independent single-stage inverters in a 14-pin SOIC package. It operates from 2.0 V to 6.0 V, delivers 10 LSTTL load drive capability, exhibits ≤10 pF input capacitance, and supports −55 °C to +125 °C operation - ideal for oscillator circuits, pulse shaping, and high-impedance digital signal conditioning in automotive and industrial control systems.

For engineers reviewing the MC74HCU04AD datasheet, pinout, applications, or equivalent options, key selection considerations include its AEC-Q100 qualification, compatibility with LS04 and MC14069UB pinouts, rail-to-rail output swing under 6 V, and guaranteed propagation delay of ≤105 ns at 125 °C with 2.0 V supply.

Technical Context

The MC74HCU04AD implements six identical unbuffered CMOS inverter stages, each with symmetrical input threshold (VIH ≈ 0.7×VCC, VIL ≈ 0.3×VCC) and no internal feedback resistors - enabling stable crystal or RC oscillator configurations when externally biased. Its high-input impedance (>1 MΩ) and low input leakage (±1.0 µA max at 125 °C) support direct interface with high-impedance sensors and legacy TTL logic via pull-up resistors.

It complies with JEDEC Standard No. 7.0 A, supports both CMOS/NMOS/TTL interfacing without level shifters, and features robust ESD protection (>2000 V HBM), making it suitable for noise-prone environments such as engine control units and motor drive feedback paths where signal integrity and thermal stability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.0 V to 6.0 V - enables single-supply operation across battery-powered (3.3 V) and legacy industrial (5 V) systems without voltage translation.
Propagation Delay (tPLH/tPHL)	≤105 ns at VCC = 2.0 V, TA = 125 °C - ensures timing predictability in high-temperature oscillator or clock-buffering applications.
Output Drive	10 LSTTL loads - sufficient to drive multiple downstream logic gates or small-signal MOSFET gates directly.
Input Capacitance (Cin)	10 pF max - minimizes loading on preceding high-impedance sources like crystal resonators or sensor amplifiers.
Operating Temperature	−55 °C to +125 °C - validated for under-hood automotive and industrial ambient conditions per AEC-Q100 Grade 1.
Quiescent Supply Current (ICC)	40 µA max at VCC = 6.0 V, TA = 125 °C - supports low-power standby modes in always-on subsystems.
ESD Withstand Voltage	>2000 V HBM - provides inherent protection against handling and board-level electrostatic discharge events.

Pinout & Package

MC74HCU04AD is supplied in a 14-lead SOIC−14 (Case 751A) package with standard 1.27 mm pitch, 8.75 mm × 3.9 mm body, and gull-wing leads. Pin 1 is marked by a notch or beveled corner; pin 7 is GND and pin 14 is VCC.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Inverter Input (A1–A6)	CMOS-compatible inputs accepting 0 V to VCC logic levels; no internal pull-ups - external bias required for TTL interfacing.
2, 4, 6, 8, 10, 12	Inverter Output (Y1–Y6)	Full-rail CMOS outputs sourcing/sinking up to ±25 mA per pin; capable of driving capacitive loads ≤50 pF within spec.
7	GND	Power return reference for all six inverters; must be low-inductance connected to system ground plane.
14	VCC	Positive supply input; requires local 0.1 µF ceramic decoupling capacitor placed within 5 mm of this pin.

Key Features

Feature	Design Value
Unbuffered Inverter Architecture	Enables stable oscillation in crystal or RC configurations without added phase shift - used in Figures 5 and 6 of datasheet.
Pb-Free, Halogen-Free, RoHS Compliant	Meets automotive and industrial environmental compliance requirements without requiring special reflow profiles.
AEC-Q100 Qualified (−Q suffix variant)	Validated for automotive applications including powertrain and body electronics; PPAP-capable manufacturing flow.
JEDEC Std. 7.0 A Compliance	Ensures interoperability with industry-standard CMOS logic families and predictable noise margin behavior.
Chip Complexity: 12 FETs / 3 Equivalent Gates	Reflects minimal transistor count per inverter stage - contributes to low static power and high-speed switching efficiency.

Applications

Crystal Oscillator Circuit	RC Pulse Shaping
Use Scenario: Generating stable clock signals for microcontroller reset supervision or CAN bus timing using a parallel-resonant quartz crystal. IC Role / Device Role / Timing Role: Unbuffered inverter configured as gain element in Pierce oscillator topology with external crystal and load capacitors. Use Value: Eliminates need for dedicated oscillator IC; leverages intrinsic gate delay and high input impedance to sustain oscillation at frequencies up to several MHz.	Use Scenario: Converting slow-rising or noisy switch inputs into clean digital edges for interrupt generation or debounce logic. IC Role / Device Role / Timing Role: Single inverter stage with external resistor-capacitor network acting as Schmitt-trigger-like waveform conditioner (Fig. 7). Use Value: Provides hysteresis-free edge sharpening with propagation delay under 15 ns at 6 V - suitable for real-time response in safety-critical I/O modules.
High-Z Sensor Interface	LED Driver Buffer
Use Scenario: Amplifying weak analog signals from piezoelectric sensors or thermistors before ADC sampling in data loggers. IC Role / Device Role / Timing Role: Single-stage inverter operated in linear region as high-input-impedance amplifier (Fig. 8), biased via external resistors. Use Value: Delivers 2–6 V supply flexibility and input impedance >1 MΩ - preserves signal fidelity from high-impedance sources without loading error.	Use Scenario: Driving indicator LEDs in automotive dashboards or industrial HMIs where current-limiting resistors are integrated off-chip. IC Role / Device Role / Timing Role: Inverter output sourcing/sinking up to 5.2 mA per pin to illuminate low-current LEDs (e.g., HLMP series). Use Value: Reduces BOM count by eliminating discrete transistor buffers while maintaining full logic-level compatibility with MCU GPIOs.

Crystal Oscillator Circuit

RC Pulse Shaping

Use Scenario: Generating stable clock signals for microcontroller reset supervision or CAN bus timing using a parallel-resonant quartz crystal.

IC Role / Device Role / Timing Role: Unbuffered inverter configured as gain element in Pierce oscillator topology with external crystal and load capacitors.

Use Value: Eliminates need for dedicated oscillator IC; leverages intrinsic gate delay and high input impedance to sustain oscillation at frequencies up to several MHz.

Use Scenario: Converting slow-rising or noisy switch inputs into clean digital edges for interrupt generation or debounce logic.

IC Role / Device Role / Timing Role: Single inverter stage with external resistor-capacitor network acting as Schmitt-trigger-like waveform conditioner (Fig. 7).

Use Value: Provides hysteresis-free edge sharpening with propagation delay under 15 ns at 6 V - suitable for real-time response in safety-critical I/O modules.

High-Z Sensor Interface

LED Driver Buffer

Use Scenario: Amplifying weak analog signals from piezoelectric sensors or thermistors before ADC sampling in data loggers.

IC Role / Device Role / Timing Role: Single-stage inverter operated in linear region as high-input-impedance amplifier (Fig. 8), biased via external resistors.

Use Value: Delivers 2–6 V supply flexibility and input impedance >1 MΩ - preserves signal fidelity from high-impedance sources without loading error.

Use Scenario: Driving indicator LEDs in automotive dashboards or industrial HMIs where current-limiting resistors are integrated off-chip.

IC Role / Device Role / Timing Role: Inverter output sourcing/sinking up to 5.2 mA per pin to illuminate low-current LEDs (e.g., HLMP series).

Use Value: Reduces BOM count by eliminating discrete transistor buffers while maintaining full logic-level compatibility with MCU GPIOs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unbuffered inverter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC04DR	Same 6-inverter function and SOIC-14 package, but not AEC-Q100 qualified; max operating temperature +85 °C only.	Suitable for commercial-grade consumer or office equipment; not approved for automotive under-hood use.	Select SN74HC04DR only if AEC-Q100 qualification and extended temperature range are not required.
74LVC04PW,118	Lower VCC range (1.65–5.5 V); higher speed (tPD ≤ 5.5 ns @ 3.3 V); TSSOP-14 only - no SOIC option.	Better suited for high-speed 3.3 V systems; lacks 6.0 V tolerance and automotive qualification.	Choose 74LVC04PW,118 when optimizing for 3.3 V portable designs with tight timing budgets and no high-temp requirement.

Compared with SN74HC04DR and 74LVC04PW,118, the MC74HCU04AD uniquely combines AEC-Q100 qualification, 2.0–6.0 V operation, and SOIC-14 packaging - making it the only option among the three qualified for automotive powertrain and industrial control applications demanding full temperature range and process traceability.

Availability

MC74HCU04AD is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC74HCU04AD 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 focused on energy-efficient electronics for automotive, industrial, cloud, and IoT applications.

The MC74HCU04AD belongs to onsemi's legacy HC logic family, designed specifically for high-reliability digital signal conditioning in harsh environments - emphasizing wide voltage operation, thermal stability, and automotive qualification.

FAQ

What is the maximum supply voltage rating for MC74HCU04AD?

The absolute maximum DC supply voltage (VCC) for MC74HCU04AD is +6.5 V, but the recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V risks exceeding safe junction temperature and may degrade long-term reliability. The MC74HCU04AD datasheet specifies guaranteed performance only within the 2.0–6.0 V window, including propagation delay, output drive, and noise immunity parameters.

Does MC74HCU04AD support direct connection to LSTTL outputs without pull-up resistors?

No - MC74HCU04AD inputs are compatible with standard CMOS outputs natively, but require external pull-up resistors to interface reliably with LSTTL outputs. This is because LSTTL logic high voltage (2.4 V min) falls below the MC74HCU04AD's VIH threshold (e.g., 1.7 V at 2.0 V VCC), and its input structure lacks internal pull-ups. The MC74HCU04AD datasheet explicitly states pull-up resistors are needed for LSTTL compatibility.

Is MC74HCU04AD pin-compatible with the 74LS04?

Yes - the MC74HCU04AD is identical in pinout to the 74LS04 and MC14069UB, as confirmed in the onsemi datasheet. All six inverter inputs (A1–A6) and outputs (Y1–Y6) occupy the same positions on the 14-pin SOIC package, with pin 7 as GND and pin 14 as VCC. However, electrical behavior differs: MC74HCU04AD draws far less quiescent current and operates over a wider voltage range than the bipolar 74LS04.

What is the typical power dissipation per inverter stage in MC74HCU04AD at 5 V?

The typical power dissipation capacitance (CPD) per inverter stage in MC74HCU04AD is 15 pF at 25 °C and VCC = 5.0 V. Using the formula PD = CPD × VCC² × f + ICC × VCC, dynamic power scales linearly with frequency - e.g., at 1 MHz, one inverter consumes ~0.375 mW dynamically plus ~0.3 µW static (ICC ≈ 0.1 µA). Total package dissipation remains well below 1077 mW (SOIC-14 limit) even with all six stages active.

Can MC74HCU04AD be used in oscillator circuits without external feedback components?

No - MC74HCU04AD requires external passive components (e.g., crystal + load capacitors or RC network) to form a functional oscillator. As an unbuffered inverter, it provides gain and phase inversion but lacks built-in feedback; Figures 5 and 6 in the datasheet show mandatory external elements. Omitting them results in undefined DC bias and no sustained oscillation. The MC74HCU04AD's design intentionally relies on external configuration for frequency control and stability.

MC74HCU04AD Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HCU

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

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Inverter

Number of Circuits:: 6

Number of Inputs:: 1

Features:: -

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 1 µA

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

Input Logic Level - Low:: 0.3V ~ 1.1V

Input Logic Level - High:: 1.7V ~ 4.8V

Max Propagation Delay @ V, Max CL:: 12ns @ 6V, 50pF

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

MC74HCU04AD FAQ

1.How can I place an order for MC74HCU04AD through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74HCU04AD 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 MC74HCU04AD reliable?

The price and inventory of MC74HCU04AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HCU04AD is usually 5 days.

3.What payment methods are accepted for MC74HCU04AD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HCU04AD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74HCU04AD?

MC74HCU04AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74HCU04AD 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 MC74HCU04AD?

For technical support, including MC74HCU04AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HCU04AD requirements.

6.How does Aetrix verify that MC74HCU04AD is sourced from the original manufacturer or authorized distributors?

All MC74HCU04AD 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 MC74HCU04AD meets industry standards.

7.What is the process for return or replacement of MC74HCU04AD?

All MC74HCU04AD units undergo pre-shipment inspection (PSI). If there is an issue with MC74HCU04AD, 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 MC74HCU04AD part is unused and in its original packaging.

Return procedure for MC74HCU04AD:

1.Submit a request within 90 days.

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

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