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

onsemi MM74HCT05SJX

Name: MM74HCT05SJX
Brand: onsemi
SKU: MM74HCT05SJX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MM74HCT05SJX

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: MM74HCT05SJX.pdf

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

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Product details

Overview

MM74HCT05SJX from onsemi is a hex inverter IC with open-drain outputs, fabricated in advanced silicon-gate CMOS technology. It provides LS-TTL pinout and voltage-threshold compatibility, 10 LS-TTL fanout capability, and operates across 4.5 V to 5.5 V supply with –40 °C to +85 °C temperature range. It enables wire-NOR logic functions in bus interface and level-shifting applications.

For engineers reviewing the MM74HCT05SJX datasheet, pinout, applications, or equivalent options, key selection factors include open-drain drive strength (25 mA sink), propagation delay (10–12 ns typical with 1 kΩ pull-up), input compatibility with TTL/NMOS/CMOS, and SOIC-14 package mechanical fit.

Technical Context

The MM74HCT05SJX implements six independent inverting buffers with open-drain outputs, requiring external pull-up resistors to realize wired-logic functions. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) match LS-TTL, enabling direct replacement without level translation.

It delivers low quiescent ICC (≤20 µA) and supports dynamic operation up to 25 MHz (based on tPLZ/tPZL ≤28 ns at CL = 50 pF). Input protection diodes clamp to VCC and GND, and output leakage (ILKG ≤5 µA) ensures high-impedance off-state integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Hex inverter with open-drain outputs - enables wired-NOR bus arbitration and level translation between 5 V TTL and higher-voltage systems.
Supply Voltage Range	4.5 V to 5.5 V - compatible with standard 5 V digital rails and tolerant of ±10% regulation variation.
Propagation Delay (tPLZ/tPZL)	10 ns / 12 ns typical (RL = 1 kΩ) - supports reliable timing in 25 MHz clock domains with margin.
Output Sink Current	25 mA per pin - sufficient to drive LED indicators, relay coils, or MOSFET gates directly with appropriate pull-up.
Input Thresholds	VIH = 2.0 V, VIL = 0.8 V - matches LS-TTL logic levels for seamless drop-in replacement in legacy designs.
Operating Temperature	–40 °C to +85 °C - qualified for industrial-grade embedded control and automotive under-hood auxiliary circuits.
Power Dissipation (SOIC)	1077 mW - allows sustained operation at full fanout without thermal derating in standard PCB layouts.

Pinout & Package

MM74HCT05SJX is housed in a 14-pin SOIC package (Case 751EF), 3.9 mm wide, with 1.27 mm pitch and standard JEDEC outline. Pin 1 is marked by a beveled corner or notch.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Inverter Input	Accepts TTL/CMOS-compatible logic signals; internally clamped to VCC and GND for ESD protection.
2, 4, 6, 8, 10, 12	Inverter Output (Open Drain)	Sinks current only; requires external pull-up resistor to define HIGH state and enable wired-logic functions.
7	GND	Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance connection.
14	VCC	Positive supply rail (4.5–5.5 V); bypass capacitor (0.1 µF) recommended near this pin.

Key Features

Feature	Design Value
Open-drain outputs	Enables wired-NOR bus structures and bidirectional I²C/SMBus-compatible signaling without additional transceivers.
LS-TTL pinout and threshold compatibility	Direct replacement for 74LS05 in existing PCBs - no layout or firmware changes required.
10 LS-TTL fanout capability	Drives up to ten standard LS loads per output, reducing need for buffer staging in dense logic networks.
Low quiescent ICC (≤20 µA)	Reduces standby power in always-on industrial controllers and battery-backed monitoring nodes.
Pb-free, halide-free packaging	Complies with RoHS Directive 2011/65/EU and JESD204B material requirements for green manufacturing.

Applications

Industrial Bus Arbitration	Legacy TTL System Upgrade
Use Scenario: Multiple microcontrollers share a common interrupt line using wired-OR topology. IC Role / Device Role / Timing Role: MM74HCT05SJX provides open-drain inversion to convert active-HIGH MCU interrupts into active-LOW shared line signals. Use Value: Eliminates discrete diode-OR networks; reduces BOM count and board space while maintaining deterministic timing (≤28 ns max delay).	Use Scenario: Upgrading aging 74LS-based control panels to lower-power CMOS logic without redesigning PCBs. IC Role / Device Role / Timing Role: MM74HCT05SJX serves as pin- and function-identical replacement for 74LS05 in address decoding and strobe generation. Use Value: Cuts system quiescent power by >90% versus LS-TTL while preserving signal integrity and timing margins.
I²C Level Translation	LED Driver Interface
Use Scenario: Interfacing 3.3 V microcontroller GPIOs to 5 V I²C peripherals with pull-ups to 5 V. IC Role / Device Role / Timing Role: MM74HCT05SJX inverts and buffers SDA/SCL signals, leveraging open-drain outputs to meet I²C bus electrical specifications. Use Value: Avoids dedicated level translators; supports standard-mode I²C (100 kHz) with guaranteed VOL ≤0.33 V at 4.8 mA sink.	Use Scenario: Driving multiple status LEDs from a 5 V logic controller with current limiting via pull-up resistors. IC Role / Device Role / Timing Role: MM74HCT05SJX sinks LED current through open-drain outputs, enabling common-anode configurations. Use Value: Simplifies LED interface design - each output drives up to 20 mA LED load with <0.1 V saturation voltage at 20 mA.

Industrial Bus Arbitration

Legacy TTL System Upgrade

Use Scenario: Multiple microcontrollers share a common interrupt line using wired-OR topology.

IC Role / Device Role / Timing Role: MM74HCT05SJX provides open-drain inversion to convert active-HIGH MCU interrupts into active-LOW shared line signals.

Use Value: Eliminates discrete diode-OR networks; reduces BOM count and board space while maintaining deterministic timing (≤28 ns max delay).

Use Scenario: Upgrading aging 74LS-based control panels to lower-power CMOS logic without redesigning PCBs.

IC Role / Device Role / Timing Role: MM74HCT05SJX serves as pin- and function-identical replacement for 74LS05 in address decoding and strobe generation.

Use Value: Cuts system quiescent power by >90% versus LS-TTL while preserving signal integrity and timing margins.

I²C Level Translation

LED Driver Interface

Use Scenario: Interfacing 3.3 V microcontroller GPIOs to 5 V I²C peripherals with pull-ups to 5 V.

IC Role / Device Role / Timing Role: MM74HCT05SJX inverts and buffers SDA/SCL signals, leveraging open-drain outputs to meet I²C bus electrical specifications.

Use Value: Avoids dedicated level translators; supports standard-mode I²C (100 kHz) with guaranteed VOL ≤0.33 V at 4.8 mA sink.

Use Scenario: Driving multiple status LEDs from a 5 V logic controller with current limiting via pull-up resistors.

IC Role / Device Role / Timing Role: MM74HCT05SJX sinks LED current through open-drain outputs, enabling common-anode configurations.

Use Value: Simplifies LED interface design - each output drives up to 20 mA LED load with <0.1 V saturation voltage at 20 mA.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT05DR	Same logic function and open-drain architecture; identical VIH/VIL but slightly higher ICC (max 40 µA vs. 20 µA).	Qualified for automotive AEC-Q100 Grade 1 (–40 °C to +125 °C), whereas MM74HCT05SJX is industrial-grade (–40 °C to +85 °C).	Select SN74HCT05DR for under-hood automotive modules requiring extended temperature operation.
74VHC05M	Higher speed (tPLZ = 7.5 ns typ), wider VCC range (2 V–5.5 V), but lacks LS-TTL input threshold compatibility (VIH = 3.5 V min at VCC = 5 V).	Not suitable as drop-in replacement for LS-TTL systems; requires input voltage scaling or redesign of driving stages.	Choose 74VHC05M only when migrating to 3.3 V–5 V mixed-supply systems and revalidating input drive conditions.

Compared with SN74HCT05DR and 74VHC05M, the MM74HCT05SJX uniquely balances LS-TTL compatibility, industrial temperature range, and ultra-low ICC - making it optimal for cost-sensitive, space-constrained upgrades of legacy 74LS designs where pin-for-pin replacement and minimal power increase are mandatory.

Availability

MM74HCT05SJX is available at Aetrix Electronics and suitable for industrial control panels, legacy system refurbishment, and I²C bus interface designs requiring stable component supply and long-term manufacturability.

Supply support for MM74HCT05SJX 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, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The MM74HCT05SJX belongs to onsemi's HCT logic family, engineered to bridge TTL and CMOS systems with LS-TTL compatibility, low power, and robust ESD protection - targeting industrial retrofits and mixed-technology interface consolidation.

FAQ

What is the maximum output sink current specification for MM74HCT05SJX?

The MM74HCT05SJX specifies a DC output sink current of ±25 mA per pin, tested under guaranteed conditions (VCC = 4.5 V, TA = –40 °C to +85 °C). This rating applies to steady-state operation and supports direct driving of LEDs, small relays, or MOSFET gates when paired with appropriate external pull-up resistors. Exceeding this limit risks parametric shift or long-term reliability degradation.

Is MM74HCT05SJX pin-compatible with the original 74LS05?

Yes, MM74HCT05SJX is fully pinout-compatible with 74LS05 and shares identical SOIC-14 (Case 751EF) footprint and terminal assignments. Its input voltage thresholds (VIH = 2.0 V, VIL = 0.8 V) and output drive characteristics are designed to replicate LS-TTL behavior, enabling true drop-in replacement without PCB modification or signal conditioning.

Does MM74HCT05SJX require external pull-up resistors on its outputs?

Yes - every output of the MM74HCT05SJX is open-drain and cannot source current. An external pull-up resistor is mandatory to establish a defined HIGH logic level. Typical values range from 1 kΩ (for speed-critical 25 MHz operation) to 10 kΩ (for low-power, low-speed interfaces), depending on bus capacitance and rise-time requirements.

What is the operating temperature range for MM74HCT05SJX?

The MM74HCT05SJX is rated for industrial operation from –40 °C to +85 °C, verified across all DC and AC electrical parameters per the onsemi datasheet. This range covers most factory automation, building control, and outdoor equipment applications, though it is not qualified for automotive AEC-Q100 or extended-temperature military use.

Can MM74HCT05SJX be used in I²C bus applications?

Yes - the open-drain outputs and guaranteed VOL ≤0.33 V at 4.8 mA make MM74HCT05SJX suitable for I²C signal buffering and level translation. When configured with 5 V pull-ups and driven by 3.3 V or 5 V controllers, it meets I²C standard-mode timing and voltage thresholds, provided propagation delays (≤28 ns) are accounted for in system timing budgets.

MM74HCT05SJX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HCT

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:: Open Drain

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 2 µA

Current - Output High, Low:: -, 4.8mA

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 15ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOP

MM74HCT05SJX FAQ

1.How can I place an order for MM74HCT05SJX through Aetrix?

Please submit a Request for Quotation (RFQ) for MM74HCT05SJX 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 MM74HCT05SJX reliable?

The price and inventory of MM74HCT05SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM74HCT05SJX is usually 5 days.

3.What payment methods are accepted for MM74HCT05SJX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM74HCT05SJX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MM74HCT05SJX?

MM74HCT05SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MM74HCT05SJX 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 MM74HCT05SJX?

For technical support, including MM74HCT05SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM74HCT05SJX requirements.

6.How does Aetrix verify that MM74HCT05SJX is sourced from the original manufacturer or authorized distributors?

All MM74HCT05SJX 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 MM74HCT05SJX meets industry standards.

7.What is the process for return or replacement of MM74HCT05SJX?

All MM74HCT05SJX units undergo pre-shipment inspection (PSI). If there is an issue with MM74HCT05SJX, 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 MM74HCT05SJX part is unused and in its original packaging.

Return procedure for MM74HCT05SJX:

1.Submit a request within 90 days.

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

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