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

onsemi MC74ACT02N

Name: MC74ACT02N
Brand: onsemi
SKU: MC74ACT02N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74ACT02N

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: MC74ACT02N.pdf

Description:: IC GATE NOR 4CH 2-INP 14DIP

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Product details

Overview

MC74ACT02N from onsemi is a quad 2-input NOR gate in SOIC-14 package, featuring TTL-compatible inputs, 24 mA output drive capability, propagation delay ≤9.0 ns at 5.0 V, and operation across −40°C to +85°C ambient temperature - used in digital logic interfacing, bus arbitration, and control signal conditioning.

For engineers reviewing the MC74ACT02N datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package mapping, functional role in level-sensitive logic systems, and validated alternative options for industrial control and legacy TTL-to-CMOS interface designs.

Technical Context

The MC74ACT02N implements four independent 2-input NOR gates using high-performance silicon-gate CMOS technology. Each gate provides rail-to-rail output swing, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), and operates with supply voltage strictly between 4.5 V and 5.5 V.

It supports dynamic output currents up to ±75 mA under transient conditions (VOLD ≤ 1.65 V, VOHD ≥ 3.85 V), exhibits input leakage ≤±1.0 μA, and maintains propagation delays tPLH/tPHL ≤9.0/10.0 ns (max) at CL = 50 pF and TA = −40°C to +85°C - confirming suitability for noise-immune combinational logic in mixed-signal environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input NOR gate - enables four independent OR-NOT operations per device
Supply Voltage Range	4.5 V to 5.5 V - requires regulated 5 V rail; not compatible with 3.3 V or wide-range supplies
Output Drive	±24 mA DC - sufficient to directly drive LEDs, small MOSFET gates, or TTL inputs without buffering
Propagation Delay	≤9.0 ns (tPLH), ≤10.0 ns (tPHL) at 5.0 V/CL = 50 pF - ensures timing predictability in synchronous control paths
Input Compatibility	TTL-compatible - accepts standard TTL VIH/VIL levels, enabling direct interface with 74LS/74F families
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded control and automation equipment
ESD Rating	Human Body Model > 2000 V - provides baseline ESD robustness during board assembly and handling

Pinout & Package

MC74ACT02N is supplied in a 14-lead SOIC (Small Outline Integrated Circuit) package per case 751A, with 1.27 mm pitch, gull-wing leads, and Pb-free finish. Dimensions: 8.55–8.75 mm × 3.80–4.00 mm × 1.35–1.75 mm height.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 12, 13	NOR Gate Inputs	Eight total inputs across four gates (e.g., Pin 1 & 2 = Gate 1 inputs; Pin 4 & 5 = Gate 2 inputs)
3, 6, 10, 11	NOR Gate Outputs	Four outputs (e.g., Pin 3 = Gate 1 output; Pin 6 = Gate 2 output)
7	GND	Ground reference for all logic and power domains; must be low-impedance connection
14	VCC	Positive supply terminal; decoupling capacitor (0.1 μF ceramic) required within 1 cm

Key Features

Feature	Design Value
TTL-Compatible Inputs	VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V supply - eliminates need for level shifters when interfacing with legacy TTL logic
High Output Drive	24 mA sink/source - supports direct fan-out to up to 10 LS-TTL loads or driving small indicator LEDs
Low Propagation Delay	Typical 4.0 ns at 5 V - enables use in high-speed enable/disable, strobe, or reset signal generation
Pb-Free Construction	RoHS-compliant packaging - meets environmental compliance requirements for industrial and automotive-adjacent applications
Wide Operating Temperature	−40°C to +85°C - supports deployment in uncontrolled industrial enclosures and outdoor control cabinets

Applications

Industrial PLC I/O Conditioning	Legacy System Bus Arbitration
Use Scenario: Isolating and combining discrete sensor status signals (e.g., limit switches, proximity sensors) before feeding into a microcontroller GPIO. IC Role / Device Role / Timing Role: NOR gate performs active-low wired-OR logic aggregation and noise filtering via Schmitt-trigger-free clean transitions. Use Value: Eliminates external pull-up resistors and reduces component count by integrating four independent logic functions in one SOIC-14 footprint.	Use Scenario: Resolving bus grant conflicts between multiple DMA controllers sharing a common data bus in an older instrumentation system. IC Role / Device Role / Timing Role: NOR gate implements priority encoder logic for bus request/grant handshaking with sub-10 ns timing resolution. Use Value: Ensures deterministic bus ownership transfer without metastability, leveraging guaranteed 5.5 V-compatible output swing and TTL input thresholds.
Microcontroller Reset Signal Generation	Power-On Sequencing Control
Use Scenario: Combining manual reset pushbutton, watchdog timeout, and brown-out detector outputs into a single synchronized reset pulse for an MCU. IC Role / Device Role / Timing Role: NOR gate acts as active-low reset combiner - all inputs high → output low (reset asserted); any input low → output high (reset released). Use Value: Provides glitch-free reset assertion with no external RC networks needed, due to consistent propagation delay and rail-rail output swing.	Use Scenario: Enabling power rails in strict sequence (e.g., 5 V before 3.3 V) using delayed enable signals derived from supervisor IC outputs. IC Role / Device Role / Timing Role: NOR gate inverts and combines enable signals to generate precise turn-on/turn-off timing windows for LDOs or DC-DC converters. Use Value: Achieves reliable sequencing without dedicated sequencer ICs, using only passive timing elements and the MC74ACT02N's predictable delay profile.

Industrial PLC I/O Conditioning

Legacy System Bus Arbitration

Use Scenario: Isolating and combining discrete sensor status signals (e.g., limit switches, proximity sensors) before feeding into a microcontroller GPIO.

IC Role / Device Role / Timing Role: NOR gate performs active-low wired-OR logic aggregation and noise filtering via Schmitt-trigger-free clean transitions.

Use Value: Eliminates external pull-up resistors and reduces component count by integrating four independent logic functions in one SOIC-14 footprint.

Use Scenario: Resolving bus grant conflicts between multiple DMA controllers sharing a common data bus in an older instrumentation system.

IC Role / Device Role / Timing Role: NOR gate implements priority encoder logic for bus request/grant handshaking with sub-10 ns timing resolution.

Use Value: Ensures deterministic bus ownership transfer without metastability, leveraging guaranteed 5.5 V-compatible output swing and TTL input thresholds.

Microcontroller Reset Signal Generation

Power-On Sequencing Control

Use Scenario: Combining manual reset pushbutton, watchdog timeout, and brown-out detector outputs into a single synchronized reset pulse for an MCU.

IC Role / Device Role / Timing Role: NOR gate acts as active-low reset combiner - all inputs high → output low (reset asserted); any input low → output high (reset released).

Use Value: Provides glitch-free reset assertion with no external RC networks needed, due to consistent propagation delay and rail-rail output swing.

Use Scenario: Enabling power rails in strict sequence (e.g., 5 V before 3.3 V) using delayed enable signals derived from supervisor IC outputs.

IC Role / Device Role / Timing Role: NOR gate inverts and combines enable signals to generate precise turn-on/turn-off timing windows for LDOs or DC-DC converters.

Use Value: Achieves reliable sequencing without dedicated sequencer ICs, using only passive timing elements and the MC74ACT02N's predictable delay profile.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad NOR gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT02N	Identical logic function, pinout, and DC/AC specs; manufactured by Texas Instruments	Same industrial temperature range and TTL compatibility; differs only in manufacturer-specific reliability testing and traceability	Select when TI-sourced components are mandated by BOM policy or dual-sourcing strategy
74VHC02N	Wider supply range (2.0–5.5 V), lower drive (±8 mA), higher propagation delay (≤11.5 ns), CMOS-only inputs	Suitable for 3.3 V systems but cannot directly replace MC74ACT02N in 5 V TTL-interfaced designs without level translation	Choose only if operating at 3.3 V or requiring ultra-low ICC (< 2 μA); not drop-in compatible

Compared with SN74ACT02N, MC74ACT02N offers identical functionality and form factor but different qualification documentation and lot traceability; versus 74VHC02N, MC74ACT02N provides superior drive strength and TTL compatibility at the cost of supply voltage inflexibility - making it optimal for 5 V industrial control where interface integrity is critical.

Availability

MC74ACT02N is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, legacy system bus arbitration, and microcontroller reset signal generation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MC74ACT02N 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 sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC74ACT02N belongs to onsemi's 74ACT logic family, designed specifically for seamless integration between legacy TTL systems and modern CMOS-based controllers - emphasizing robust noise immunity, precise timing, and industrial temperature resilience.

FAQ

What is the recommended supply voltage range for MC74ACT02N?

The MC74ACT02N is specified for operation only between 4.5 V and 5.5 V. Operation outside this range violates the Recommended Operating Conditions in the datasheet and may result in undefined logic states, increased ICC, or accelerated wear. The MC74ACT02N does not support 3.3 V or mixed-voltage operation - use MC74VHC02 for wider supply flexibility.

Does MC74ACT02N have Schmitt-trigger inputs?

No, the MC74ACT02N does not include Schmitt-trigger inputs. Its input thresholds are fixed TTL-compatible levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V), with no hysteresis. For noisy signal environments requiring noise margin, external RC filtering or a dedicated Schmitt-trigger device such as MC74VHC14 must be used alongside MC74ACT02N.

Can MC74ACT02N directly drive a standard red LED?

Yes, the MC74ACT02N can directly drive a standard 2 mA red LED with a series resistor. With its guaranteed 24 mA sink capability and VOL ≤ 0.44 V at IOL = 24 mA, the MC74ACT02N provides sufficient margin to maintain logic-low voltage while sourcing current through typical 1.8–2.2 V forward-voltage LEDs - confirm resistor value using VCC − VF − VOL to set desired current.

Is MC74ACT02N pin-compatible with MC74AC02N?

Yes, MC74ACT02N is pin-compatible with MC74AC02N - both share identical SOIC-14 pinout, logic function, and package dimensions. However, MC74ACT02N features TTL-compatible inputs while MC74AC02N uses CMOS-compatible inputs (VIH = 3.15 V min at 4.5 V), so direct substitution requires verification of upstream driver compatibility.

What is the maximum capacitive load MC74ACT02N can drive reliably?

The MC74ACT02N is characterized for CL = 50 pF in AC specifications, with propagation delay degradation and potential waveform distortion occurring beyond that. While the datasheet does not specify an absolute maximum, practical design limits recommend keeping total load capacitance ≤50 pF per output - use buffer stages (e.g., 74ACT541) for driving longer traces, cables, or multiple loads.

MC74ACT02N Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74ACT

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

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: NOR Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 4 µA

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

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 9.5ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-PDIP

MC74ACT02N FAQ

1.How can I place an order for MC74ACT02N through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74ACT02N 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 MC74ACT02N reliable?

The price and inventory of MC74ACT02N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT02N is usually 5 days.

3.What payment methods are accepted for MC74ACT02N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT02N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74ACT02N?

MC74ACT02N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74ACT02N 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 MC74ACT02N?

For technical support, including MC74ACT02N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT02N requirements.

6.How does Aetrix verify that MC74ACT02N is sourced from the original manufacturer or authorized distributors?

All MC74ACT02N 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 MC74ACT02N meets industry standards.

7.What is the process for return or replacement of MC74ACT02N?

All MC74ACT02N units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT02N, 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 MC74ACT02N part is unused and in its original packaging.

Return procedure for MC74ACT02N:

1.Submit a request within 90 days.

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

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