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

onsemi MC74AC05NG

Name: MC74AC05NG
Brand: onsemi
SKU: MC74AC05NG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74AC05NG

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: MC74AC05NG.pdf

Description:: IC INVERTER OD 6CH 1IN 14DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC74AC05NG from onsemi is a hex inverter IC with open-drain outputs, designed for level-shifting and wired-OR logic applications in 2.0–6.0 V systems. It features six independent inverting buffers, each capable of sinking 24 mA, TTL-compatible inputs (via pull-up), and operates across −40°C to +85°C ambient temperature.

For engineers reviewing the MC74AC05NG datasheet, pinout, applications, or equivalent options, this device is selected for bus interface, LED driving, I²C pull-up replacement, and mixed-voltage logic translation where active-low open-drain control is required.

Technical Context

The MC74AC05NG implements six identical CMOS inverter stages, each with an open-drain output stage enabling wired-OR connectivity and bidirectional voltage translation. Its input structure is compatible with both CMOS and TTL logic families when externally pulled up.

It uses high-performance silicon-gate CMOS technology, delivering propagation delays as low as 6.0 ns (typical at VCC = 5.0 V, CL = 50 pF) and supports dynamic output currents up to ±75 mA for short-duration pulses. The device lacks internal pull-ups, requiring external resistors for high-level assertion.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Hex inverter with open-drain outputs - enables wired-OR bus structures and level translation without direction control.
Supply Voltage Range	2.0 V to 6.0 V - supports operation across 3.3 V and 5 V systems, including mixed-voltage interfaces.
Output Sink Current	24 mA per channel - sufficient to drive LEDs, small relays, or standard logic inputs directly.
Propagation Delay	6.0 ns max at 5.0 V/50 pF - ensures timing compatibility with medium-speed digital buses like I²C Fast-mode.
Input Compatibility	CMOS- and TTL-compatible inputs (with external pull-up) - allows direct interfacing with legacy 74LS and modern 3.3 V logic.
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded control and automotive body electronics.
ESD Rating	>2000 V HBM - provides robust handling during PCB assembly and field service without additional protection.

Pinout & Package

MC74AC05NG is supplied in a Pb-free SOIC-14 (Case 751A) package measuring 8.75 mm × 3.90 mm × 1.75 mm, with 1.27 mm pitch 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)	Dedicated CMOS/TTL-compatible input per inverter stage; no internal pull-up - requires external bias for defined HIGH state.
2, 4, 6, 8, 10, 12	Inverter Output (Y1–Y6)	Open-drain NMOS output - sinks current only; must be externally pulled up to define HIGH level and set voltage domain.
7	GND	Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance connection to system ground plane.
14	VCC	Positive supply rail (2.0–6.0 V); decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin for noise immunity.

Key Features

Feature	Design Value
Open-drain outputs	Enables shared-bus arbitration and level translation between 3.3 V and 5 V domains without direction pins or translators.
24 mA sink capability	Drives standard LEDs (20 mA), small solenoids, or multiple 74-series inputs without external driver transistors.
Pb-free SOIC-14 package	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (unlimited floor life).
Wide VCC range (2.0–6.0 V)	Eliminates need for separate voltage translators in multi-rail systems; simplifies power architecture for mixed-signal boards.
Low input leakage (<±1.0 µA)	Minimizes current draw in battery-powered applications and prevents unintended logic transitions in high-impedance nodes.

Applications

I²C Bus Level Translation	LED Driver Interface
Use Scenario: Interfacing a 3.3 V microcontroller I²C master with 5 V peripheral slaves using standard pull-up resistors on SDA/SCL lines. IC Role / Device Role / Timing Role: Acts as bidirectional open-drain buffer replacing discrete MOSFET translators; preserves I²C timing compliance and slew rate. Use Value: Reduces BOM count by eliminating dual-FET level shifters while maintaining Fast-mode (400 kHz) timing margins and bus contention safety.	Use Scenario: Driving common-anode RGB LEDs from a 5 V microcontroller GPIO with individual cathode control per color channel. IC Role / Device Role / Timing Role: Provides six independent open-drain sinks to switch LED cathodes to GND; each inverter isolates color channels electrically. Use Value: Enables precise PWM dimming per channel without cross-talk; 24 mA rating supports full brightness for standard 20 mA LEDs.
Wired-OR Interrupt Bus	Mixed-Voltage Logic Interface
Use Scenario: Aggregating interrupt signals from multiple 3.3 V sensors onto a single 5 V MCU interrupt line using pull-up to 5 V. IC Role / Device Role / Timing Role: Inverts and ORs active-low interrupt outputs into one active-low shared interrupt signal; eliminates diode-OR complexity. Use Value: Guarantees clean logic thresholds and fast fall times (<6.5 ns) even under capacitive loading, avoiding metastability on interrupt deassertion.	Use Scenario: Connecting a 5 V FPGA configuration PROM to a 3.3 V FPGA core voltage domain via address/data bus. IC Role / Device Role / Timing Role: Buffers PROM output enable and data lines as open-drain drivers pulled to 3.3 V, ensuring safe voltage levels at FPGA inputs. Use Value: Prevents overvoltage damage to 3.3 V FPGA I/O while preserving read access timing; eliminates need for dedicated level-shifter ICs.

I²C Bus Level Translation

LED Driver Interface

Use Scenario: Interfacing a 3.3 V microcontroller I²C master with 5 V peripheral slaves using standard pull-up resistors on SDA/SCL lines.

IC Role / Device Role / Timing Role: Acts as bidirectional open-drain buffer replacing discrete MOSFET translators; preserves I²C timing compliance and slew rate.

Use Value: Reduces BOM count by eliminating dual-FET level shifters while maintaining Fast-mode (400 kHz) timing margins and bus contention safety.

Use Scenario: Driving common-anode RGB LEDs from a 5 V microcontroller GPIO with individual cathode control per color channel.

IC Role / Device Role / Timing Role: Provides six independent open-drain sinks to switch LED cathodes to GND; each inverter isolates color channels electrically.

Use Value: Enables precise PWM dimming per channel without cross-talk; 24 mA rating supports full brightness for standard 20 mA LEDs.

Wired-OR Interrupt Bus

Mixed-Voltage Logic Interface

Use Scenario: Aggregating interrupt signals from multiple 3.3 V sensors onto a single 5 V MCU interrupt line using pull-up to 5 V.

IC Role / Device Role / Timing Role: Inverts and ORs active-low interrupt outputs into one active-low shared interrupt signal; eliminates diode-OR complexity.

Use Value: Guarantees clean logic thresholds and fast fall times (<6.5 ns) even under capacitive loading, avoiding metastability on interrupt deassertion.

Use Scenario: Connecting a 5 V FPGA configuration PROM to a 3.3 V FPGA core voltage domain via address/data bus.

IC Role / Device Role / Timing Role: Buffers PROM output enable and data lines as open-drain drivers pulled to 3.3 V, ensuring safe voltage levels at FPGA inputs.

Use Value: Prevents overvoltage damage to 3.3 V FPGA I/O while preserving read access timing; eliminates need for dedicated level-shifter ICs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter with open-drain applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC06APWR	3.3 V only (1.65–3.6 V), lower VCC max; 24 mA sink; smaller TSSOP-14 package.	Not suitable for 5 V systems or mixed 2.0–6.0 V operation; optimized for low-voltage portable designs.	Select when board space is constrained and system operates strictly at 3.3 V with tight power budgets.
74AHC05PW,118	Wider VCC (2.0–5.5 V), 8 mA sink (lower drive), same SOIC-14 footprint; higher VIH/VIL thresholds.	Lower drive limits use in LED or relay loads; less tolerant of marginal input noise near switching thresholds.	Select when lower power consumption is prioritized over drive strength and compatibility with TTL-level inputs is not required.

Compared with SN74LVC06APWR and 74AHC05PW,118, the MC74AC05NG uniquely supports full 2.0–6.0 V operation with TTL-compatible inputs and 24 mA sink strength - making it the only option among the three validated for 5 V bus translation and legacy logic interfacing without external level-shifting components.

Availability

MC74AC05NG is available at Aetrix Electronics and suitable for industrial control panels, automotive body modules, and IoT sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC74AC05NG 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 innovation for automotive, industrial, cloud, and IoT applications.

The MC74AC05NG belongs to the 74AC logic family - engineered for high-speed, low-power CMOS performance with TTL compatibility and robust industrial operating margins.

FAQ

What is the maximum supply voltage for MC74AC05NG?

The MC74AC05NG supports a DC supply voltage range of 2.0 V to 6.0 V. Absolute maximum rating is +6.5 V, but sustained operation above 6.0 V risks parametric degradation and reduced reliability. For stable long-term use, VCC should remain within the recommended 2.0–6.0 V window specified in the datasheet.

Does MC74AC05NG have internal pull-up resistors on its outputs?

No, the MC74AC05NG does not include internal pull-up resistors. Its outputs are strictly open-drain NMOS devices and require external pull-up resistors to define the HIGH logic level and set the output voltage domain. Typical values range from 1.8 kΩ (for 5 V, 2.8 mA) to 10 kΩ (for 3.3 V, 0.33 mA), depending on speed and current requirements.

Can MC74AC05NG be used as a direct replacement for 74LS05?

Yes, the MC74AC05NG is pinout-compatible with the 74LS05 and functionally equivalent as a hex inverter with open-drain outputs. However, it requires external pull-ups (unlike LS TTL's internal pull-ups) and operates across a wider voltage range (2.0–6.0 V vs. 4.75–5.25 V), so system-level voltage and loading conditions must be verified before drop-in substitution.

What is the propagation delay of MC74AC05NG at 5.0 V?

At VCC = 5.0 V, CL = 50 pF, and TA = +25°C, the MC74AC05NG exhibits a typical propagation delay of 4.5 ns and a maximum of 6.0 ns (tPLZ/tPZL). Over the full industrial temperature range (−40°C to +85°C), the maximum delay increases to 6.5 ns, ensuring timing predictability in real-world thermal environments.

Is MC74AC05NG RoHS compliant and lead-free?

Yes, MC74AC05NG is a Pb-free device, as confirmed by onsemi's marking "G" suffix and compliance with RoHS Directive 2011/65/EU. The SOIC-14 package uses matte tin lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level 1, allowing unlimited floor life under standard storage conditions.

MC74AC05NG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74AC

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Inverter

Number of Circuits:: 6

Number of Inputs:: 1

Features:: Open Drain

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 4 µA

Current - Output High, Low:: -, 24mA

Input Logic Level - Low:: 0.9V ~ 1.65V

Input Logic Level - High:: 2.1V ~ 3.85V

Max Propagation Delay @ V, Max CL:: 6ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-PDIP

MC74AC05NG FAQ

1.How can I place an order for MC74AC05NG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74AC05NG 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 MC74AC05NG reliable?

The price and inventory of MC74AC05NG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74AC05NG is usually 5 days.

3.What payment methods are accepted for MC74AC05NG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74AC05NG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74AC05NG?

MC74AC05NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74AC05NG 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 MC74AC05NG?

For technical support, including MC74AC05NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74AC05NG requirements.

6.How does Aetrix verify that MC74AC05NG is sourced from the original manufacturer or authorized distributors?

All MC74AC05NG 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 MC74AC05NG meets industry standards.

7.What is the process for return or replacement of MC74AC05NG?

All MC74AC05NG units undergo pre-shipment inspection (PSI). If there is an issue with MC74AC05NG, 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 MC74AC05NG part is unused and in its original packaging.

Return procedure for MC74AC05NG:

1.Submit a request within 90 days.

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

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