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

onsemi MC74AC05D

Name: MC74AC05D
Brand: onsemi
SKU: MC74AC05D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74AC05D

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: MC74AC05D.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC74AC05D from onsemi is a hex inverter IC with open-drain outputs, designed for level-shifting and wired-OR logic applications in high-performance CMOS systems. It operates from 2.0 V to 6.0 V, delivers ±24 mA output drive, features TTL-compatible inputs only in ACT variants (not this AC version), and is packaged in Pb-free SOIC-14. It is commonly used in bus interface circuits requiring active-low open-drain signaling.

For engineers reviewing the MC74AC05D datasheet, pinout, applications, or equivalent options, key selection considerations include its open-drain output architecture, supply voltage range (2.0–6.0 V), input compatibility with CMOS outputs (not TTL), −40°C to +85°C operating temperature, and SOIC-14 package mechanical footprint.

Technical Context

The MC74AC05D implements six independent inverting buffers, each with an open-drain output stage that requires an external pull-up resistor to define the HIGH logic level. Its inputs are fully compatible with standard CMOS output voltage levels but lack internal TTL-level thresholds - unlike the MC74ACT05 variant.

Each output supports dynamic sink currents up to 75 mA (pulse-tested) and steady-state sink current of 24 mA at V_OL ≤ 0.1 V, with input leakage limited to ±1.0 µA over temperature. Propagation delays are specified at 6.0 ns (max, 5.0 V, CL = 50 pF) and input rise/fall time sensitivity is rated at 25 ns/V at 5.5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Hex inverter with six independent open-drain outputs
Supply Voltage Range	2.0 V to 6.0 V - enables interoperability across 3.3 V and 5 V domains
Output Drive (I_OL)	24 mA max at V_OL ≤ 0.1 V - sufficient to drive typical LED loads or I²C bus capacitance
Input Compatibility	CMOS-level only (VIH ≥ 2.1 V @ 3.0 V; VIL ≤ 0.9 V @ 3.0 V) - not TTL-input compatible
Propagation Delay	6.5 ns max @ 5.0 V, CL = 50 pF - supports >100 MHz toggle rates in low-capacitance nets
Operating Temperature	−40°C to +85°C - qualified for industrial ambient environments
ESD Rating	HBM > 2000 V - provides robust handling in standard assembly environments

Pinout & Package

MC74AC05D is housed in a 14-lead SOIC package (Case 751A), with 1.27 mm pitch, 8.75 mm × 3.90 mm body dimensions, and exposed pad not present. Pin 1 is index-marked; Pin 7 is GND; Pin 14 is V_CC.

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 9, 11, 13	Inverter Input (A1–A6)	Digital logic inputs accepting CMOS-level signals; no internal pull-up or Schmitt trigger
2, 4, 6, 8, 10, 12	Inverter Output (Y1–Y6)	Open-drain NMOS outputs - require external pull-up for HIGH state; support wired-OR and level translation
7	GND	Ground reference for all inputs, outputs, and internal circuitry
14	V_CC	Positive supply rail (2.0–6.0 V); powers internal logic and output stage

Key Features

Feature	Design Value
Open-drain outputs	Enable wired-OR bus architectures and bidirectional I²C/SMBus compatibility without external diodes
High noise immunity	Input thresholds scale with V_CC (VIH = 0.7×V_CC, VIL = 0.3×V_CC), maintaining margin across supply variations
Pb-free SOIC-14 package	Complies with RoHS Directive 2011/65/EU; compatible with standard reflow profiles (MSL Level 1)
Low quiescent current	I_CC ≤ 40 µA max - suitable for battery-backed or low-power standby modes
Dynamic output capability	Supports 75 mA pulsed sink (2 ms max) - allows brief surge loading for LED strobing or relay driving

Applications

I²C Bus Level Shifter	LED Driver Interface
Use Scenario: Translating 3.3 V microcontroller GPIO to 5 V I²C bus while maintaining protocol compliance. IC Role / Device Role / Timing Role: Open-drain inverter acting as bidirectional level translator with externally pulled SDA/SCL lines. Use Value: Eliminates need for dedicated level-shifter ICs; leverages existing GPIO pins and standard pull-ups for cost-effective mixed-voltage interconnect.	Use Scenario: Driving multiple common-anode LEDs from a 5 V microcontroller with active-low control logic. IC Role / Device Role / Timing Role: Inverting open-drain buffer sinking current through LED cathodes to GND. Use Value: Enables direct microcontroller control without external transistor stages; 24 mA per channel supports standard indicator LEDs at full brightness.
Wired-OR Logic Bus	Reset Signal Aggregation
Use Scenario: Combining interrupt or fault signals from multiple subsystems onto a shared active-low interrupt line. IC Role / Device Role / Timing Role: Six independent open-drain inverters configured as signal conditioners and OR-gate equivalents. Use Value: Provides glitch-free signal aggregation with no contention risk; eliminates discrete diode-resistor OR networks and saves board space.	Use Scenario: Generating a system-wide reset pulse by OR-ing individual module reset requests in industrial PLC backplanes. IC Role / Device Role / Timing Role: Inverting and aggregating asynchronous reset signals into a single open-drain reset bus. Use Value: Ensures deterministic reset assertion timing; avoids race conditions during power-up sequencing due to consistent propagation delay (≤6.5 ns).

I²C Bus Level Shifter

LED Driver Interface

Use Scenario: Translating 3.3 V microcontroller GPIO to 5 V I²C bus while maintaining protocol compliance.

IC Role / Device Role / Timing Role: Open-drain inverter acting as bidirectional level translator with externally pulled SDA/SCL lines.

Use Value: Eliminates need for dedicated level-shifter ICs; leverages existing GPIO pins and standard pull-ups for cost-effective mixed-voltage interconnect.

Use Scenario: Driving multiple common-anode LEDs from a 5 V microcontroller with active-low control logic.

IC Role / Device Role / Timing Role: Inverting open-drain buffer sinking current through LED cathodes to GND.

Use Value: Enables direct microcontroller control without external transistor stages; 24 mA per channel supports standard indicator LEDs at full brightness.

Wired-OR Logic Bus

Reset Signal Aggregation

Use Scenario: Combining interrupt or fault signals from multiple subsystems onto a shared active-low interrupt line.

IC Role / Device Role / Timing Role: Six independent open-drain inverters configured as signal conditioners and OR-gate equivalents.

Use Value: Provides glitch-free signal aggregation with no contention risk; eliminates discrete diode-resistor OR networks and saves board space.

Use Scenario: Generating a system-wide reset pulse by OR-ing individual module reset requests in industrial PLC backplanes.

IC Role / Device Role / Timing Role: Inverting and aggregating asynchronous reset signals into a single open-drain reset bus.

Use Value: Ensures deterministic reset assertion timing; avoids race conditions during power-up sequencing due to consistent propagation delay (≤6.5 ns).

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
MC74AC05DR2G	Same die and electrical specs; differs only in tape-and-reel packaging (2500 pcs/reel vs. rail)	No functional difference; identical use in PCB design and schematic symbol	Select for automated SMT assembly; same pinout, timing, and thermal behavior as MC74AC05D
SN74LVC06APWR	3.3 V optimized (1.65–3.6 V), lower V_OL (0.1 V @ 24 mA), higher speed (4.5 ns max), but not 5 V tolerant	Not suitable for 5 V bus interfacing; requires level shifting if interfacing with 5 V peripherals	Prefer for 3.3 V-only systems demanding lower power and faster edges; not drop-in for mixed-voltage designs

Compared with MC74AC05D, MC74AC05DR2G offers identical functionality in tape-and-reel form for production use, while SN74LVC06APWR provides superior speed and efficiency in 3.3 V domains but sacrifices 5 V interoperability and open-drain voltage headroom.

Availability

MC74AC05D is available at Aetrix Electronics and suitable for industrial control interfaces, I²C bus expansion, and LED driver circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MC74AC05D 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 silicon solutions for automotive, industrial, cloud, and IoT applications.

The MC74AC05D belongs to onsemi's legacy 74AC logic family, engineered for high-speed, low-power CMOS operation with open-drain flexibility in industrial and mixed-signal interface applications.

FAQ

What is the maximum supply voltage for MC74AC05D?

The absolute maximum DC supply voltage for MC74AC05D is +6.5 V, but the recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V risks exceeding internal oxide breakdown limits and is not guaranteed for reliability or parametric performance. The MC74AC05D datasheet specifies guaranteed functionality only within the 2.0–6.0 V window under all temperature and load conditions.

Does MC74AC05D support TTL-level input signals?

No, MC74AC05D does not support TTL-level inputs. Its input thresholds are CMOS-compatible only (VIH ≥ 2.1 V at 3.0 V supply), whereas TTL requires VIH ≥ 2.0 V with different hysteresis and drive strength. For TTL compatibility, the pin-compatible MC74ACT05 variant must be used instead. The MC74AC05D datasheet explicitly states that only the ′ACT version has TTL-compatible inputs.

Can MC74AC05D drive an I²C bus directly?

Yes, MC74AC05D can drive an I²C bus directly when configured with appropriate external pull-up resistors on its open-drain outputs. Each output supports 24 mA sink current and meets I²C voltage thresholds (V_OL ≤ 0.4 V at 3 mA) at 3.3 V or 5 V supply. The MC74AC05D's propagation delay (≤6.5 ns) and capacitive loading (C_IN = 4.5 pF) ensure compatibility with standard-mode (100 kHz) and fast-mode (400 kHz) I²C timing budgets.

What is the thermal resistance (θ_JA) of MC74AC05D in SOIC-14 package?

The junction-to-ambient thermal resistance (θ_JA) for MC74AC05D in the SOIC-14 package (Case 751A) is 116°C/W, as specified in the Maximum Ratings table of the official onsemi datasheet. This value assumes still air conditions and standard PCB copper area; actual thermal performance improves with added copper pour or airflow. The MC74AC05D's maximum power dissipation in still air is 1077 mW at 25°C ambient.

Is MC74AC05D RoHS compliant and lead-free?

Yes, MC74AC05D is RoHS compliant and Pb-free, as confirmed by the "G" suffix in its ordering code (e.g., MC74AC05DG, MC74AC05DR2G) and explicit statement in the Features section of the onsemi datasheet. The device meets JEDEC J-STD-609A Class 1 marking requirements and is qualified for lead-free reflow soldering per IPC/JEDEC J-STD-020.

MC74AC05D Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74AC

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:: 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:: Surface Mount

Supplier Device Package:: 14-SOIC

MC74AC05D FAQ

1.How can I place an order for MC74AC05D through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74AC05D 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 MC74AC05D reliable?

The price and inventory of MC74AC05D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74AC05D is usually 5 days.

3.What payment methods are accepted for MC74AC05D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74AC05D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74AC05D?

MC74AC05D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74AC05D 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 MC74AC05D?

For technical support, including MC74AC05D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74AC05D requirements.

6.How does Aetrix verify that MC74AC05D is sourced from the original manufacturer or authorized distributors?

All MC74AC05D 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 MC74AC05D meets industry standards.

7.What is the process for return or replacement of MC74AC05D?

All MC74AC05D units undergo pre-shipment inspection (PSI). If there is an issue with MC74AC05D, 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 MC74AC05D part is unused and in its original packaging.

Return procedure for MC74AC05D:

1.Submit a request within 90 days.

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

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