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

onsemi 74ACT08SC

Name: 74ACT08SC
Brand: onsemi
SKU: 74ACT08SC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT08SC

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: 74ACT08SC.pdf

Description:: IC GATE AND 4CH 2-INP 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74ACT08SC from ON Semiconductor is a quad 2-input AND gate logic IC operating at 4.5V–5.5V supply, delivering 24mA output drive capability, 6.5ns typical propagation delay (tPLH/tPHL), and TTL-compatible input thresholds. It performs Boolean AND logic in digital control paths of industrial PLCs, instrumentation front-ends, and bus interface circuits.

For engineers reviewing the 74ACT08SC datasheet, pinout, applications, or equivalent options, this page provides verified functional specifications, SOIC-14 package details, real-world use cases, and validated alternative options for logic-level signal gating and combinatorial control design.

Technical Context

The 74ACT08SC implements four independent 2-input AND gates in a single monolithic CMOS device with ACT-series TTL-compatible input thresholds (VIH = 2.0V min, VIL = 0.8V max at VCC = 4.5V–5.5V) and rail-to-rail output swing. It supports full-speed operation across –40°C to +85°C with guaranteed 24mA sink/source per output.

Its AC characteristics are specified under CL = 50pF load and VCC = 5.0V ±0.5V, with symmetric tPLH/tPHL (1.0–10.0ns) and low dynamic current capability (IOLD/IOHD = ±75mA). Input capacitance is 4.5pF, and power dissipation capacitance is 20.0pF - enabling stable high-frequency switching without excessive loading.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input AND gate - four independent gates performing Boolean conjunction on paired inputs.
Supply Voltage Range	4.5V to 5.5V - compatible with standard 5V TTL/CMOS systems; not rated for 3.3V operation.
Output Drive	±24mA per output - sufficient to directly drive LEDs, small MOSFET gates, or multiple 74-series inputs.
Propagation Delay	6.5ns typical (tPLH/tPHL, VCC = 5.0V, CL = 50pF) - enables reliable operation up to ~100MHz toggle rate in fanout-limited paths.
Input Thresholds	VIH = 2.0V min, VIL = 0.8V max - ensures robust noise margin against TTL-level signals and compatibility with legacy microcontroller GPIO.
Operating Temperature	–40°C to +85°C - qualified for industrial ambient environments without derating.
Package	14-Lead SOIC (JEDEC MS-012, 0.150" narrow body) - surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.

Pinout & Package

74ACT08SC uses a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body width, with standard gull-wing leads and 1.27mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 11, 12	Input (A1/B1, A2/B2, A3/B3, A4/B4)	Eight dedicated logic inputs - grouped as four pairs feeding respective AND gates.
3, 6, 10, 13	Output (Y1–Y4)	Four buffered AND outputs - each capable of sourcing/sinking 24mA with rail-aligned VOH/VOL.
7	GND	Ground reference for all logic and I/O - must be low-impedance connection to system common.
14	VCC	Positive supply terminal - requires local 0.1µF ceramic decoupling adjacent to pin.

Key Features

Feature	Design Value
TTL-compatible input thresholds	VIH ≥ 2.0V and VIL ≤ 0.8V at 5V - eliminates need for level-shifting when interfacing with legacy 5V microcontrollers or peripherals.
24mA output drive per gate	Supports direct driving of moderate loads (e.g., optocoupler LEDs, small-signal MOSFETs) without external buffers.
Low propagation delay (6.5ns typ)	Enables use in timing-critical combinational logic paths where gate delay impacts setup/hold margins.
Wide industrial temperature range	–40°C to +85°C operation - suitable for uncontrolled environments such as factory-floor controllers and outdoor telemetry units.
Lead-free packaging	Complies with JEDEC J-STD-020B - supports RoHS-compliant assembly and long-term supply chain sustainability.

Applications

Industrial Control Logic	Bus Interface Gating
Use Scenario: Enabling/disabling data lines between microcontroller and peripheral ICs based on address decode or mode selection. IC Role / Device Role / Timing Role: Combinatorial enable gate that asserts only when both address and chip-select signals are active. Use Value: Prevents bus contention by ensuring only one peripheral responds during any memory-mapped transaction cycle.	Use Scenario: Synchronizing write strobes to memory-mapped registers in multi-master systems. IC Role / Device Role / Timing Role: AND gate combining master clock edge and write-enable signal to generate precise register latch timing. Use Value: Guarantees setup time compliance for synchronous register writes without adding FPGA or CPLD logic.
Power Sequencing Control	LED Status Indication Logic
Use Scenario: Controlling activation of secondary voltage rails only after primary supplies stabilize and enable signals assert. IC Role / Device Role / Timing Role: Gate enforcing "AND" condition between PGOOD outputs and system reset release. Use Value: Eliminates risk of premature IC power-up by requiring dual confirmation before enabling downstream regulators.	Use Scenario: Driving status LEDs only when both fault flag and power-on signal are asserted. IC Role / Device Role / Timing Role: Dual-input logic gate combining MCU GPIO and hardware fault line to illuminate LED only on confirmed error state. Use Value: Reduces false-positive visual alerts and extends LED lifetime by avoiding unnecessary illumination cycles.

Industrial Control Logic

Bus Interface Gating

Use Scenario: Enabling/disabling data lines between microcontroller and peripheral ICs based on address decode or mode selection.

IC Role / Device Role / Timing Role: Combinatorial enable gate that asserts only when both address and chip-select signals are active.

Use Value: Prevents bus contention by ensuring only one peripheral responds during any memory-mapped transaction cycle.

Use Scenario: Synchronizing write strobes to memory-mapped registers in multi-master systems.

IC Role / Device Role / Timing Role: AND gate combining master clock edge and write-enable signal to generate precise register latch timing.

Use Value: Guarantees setup time compliance for synchronous register writes without adding FPGA or CPLD logic.

Power Sequencing Control

LED Status Indication Logic

Use Scenario: Controlling activation of secondary voltage rails only after primary supplies stabilize and enable signals assert.

IC Role / Device Role / Timing Role: Gate enforcing "AND" condition between PGOOD outputs and system reset release.

Use Value: Eliminates risk of premature IC power-up by requiring dual confirmation before enabling downstream regulators.

Use Scenario: Driving status LEDs only when both fault flag and power-on signal are asserted.

IC Role / Device Role / Timing Role: Dual-input logic gate combining MCU GPIO and hardware fault line to illuminate LED only on confirmed error state.

Use Value: Reduces false-positive visual alerts and extends LED lifetime by avoiding unnecessary illumination cycles.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT08DR	Same logic function, identical AC/ACT electrical specs, SOIC-14 package, TI-manufactured with different thermal resistance (θJA = 120°C/W vs ON's 130°C/W).	Validated in TI's automotive-grade qualification flow; preferred where AEC-Q100 compliance is required.	Select SN74ACT08DR if automotive qualification or TI-specific support ecosystem is prioritized over ON's industrial longevity track record.
MC74ACT08DG	Identical pinout and DC/AC specs; manufactured by ON Semiconductor but in narrower 3.9mm TSSOP-14 (MTC14) package instead of SOIC-14.	Requires PCB redesign due to smaller footprint and finer pitch; suited for space-constrained designs where thermal performance is secondary.	Choose MC74ACT08DG only when board area is critical and rework of layout is acceptable for higher-density placement.

Compared with SN74ACT08DR and MC74ACT08DG, the 74ACT08SC offers optimal balance of industrial temperature reliability, SOIC-14 manufacturability, and proven field longevity - making it the default choice for general-purpose 5V logic gating where layout stability and supply-chain continuity are priorities.

Availability

74ACT08SC is available at Aetrix Electronics and suitable for industrial control panels, test equipment interfaces, and embedded instrumentation requiring stable component supply, long-life availability, and consistent parametric performance across production batches.

Supply support for 74ACT08SC 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

ON Semiconductor (now part of onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, logic, and sensor solutions for industrial, automotive, and cloud infrastructure markets.

The 74ACT08SC belongs to the ACT family of advanced CMOS logic devices designed specifically for high-speed, low-noise 5V digital systems requiring TTL compatibility, robust ESD tolerance, and extended temperature operation.

FAQ

What is the maximum operating supply voltage for the 74ACT08SC?

The 74ACT08SC has an absolute maximum VCC rating of +7.0V, but its recommended operating range is strictly 4.5V to 5.5V per datasheet Section "Recommended Operating Conditions." Operation outside this window may cause undefined logic behavior or accelerated parametric drift. The 74ACT08SC is not characterized or guaranteed for 3.3V or 2.5V use.

Does the 74ACT08SC support mixed-voltage interfacing, such as 3.3V inputs driving a 5V-powered 74ACT08SC?

No - the 74ACT08SC requires VCC = 4.5–5.5V and defines VIH ≥ 2.0V and VIL ≤ 0.8V at that supply. While many 3.3V outputs exceed 2.0V VOH, the 74ACT08SC does not guarantee recognition of 3.3V logic HIGHs under worst-case conditions (e.g., temperature extremes or process variation). Direct interfacing is not recommended without level translation.

Can the 74ACT08SC drive a 50Ω transmission line directly?

No - the 74ACT08SC is not designed as a line driver. Its 24mA output capability and 6.5ns propagation delay assume CL = 50pF capacitive loading, not 50Ω resistive termination. Driving a 50Ω line would require ~100mA at 5V and induce signal integrity issues. Use dedicated line drivers (e.g., SN65LVDS1) for such applications; the 74ACT08SC remains appropriate for board-level logic gating only.

Is the 74ACT08SC pin-compatible with the older 74LS08?

Yes - the 74ACT08SC shares identical pinout (14-pin DIP/SOIC/TSSOP) and logic function with 74LS08, but differs electrically: it draws far less quiescent current (40µA vs ~15mA), delivers higher output drive (24mA vs 8mA), and operates with CMOS-level noise immunity. No PCB changes are needed for drop-in replacement, though timing and loading behavior will improve.

What is the thermal resistance (θJA) of the 74ACT08SC in SOIC-14 package?

The 74ACT08SC in M14A SOIC-14 package has a typical junction-to-ambient thermal resistance (θJA) of 130°C/W under standard JEDEC test conditions (1squared inch 2-oz copper pad, no airflow). This value assumes proper PCB layout with adequate copper pour connected to pins 7 (GND) and 14 (VCC); actual θJA may vary based on board design and airflow.

74ACT08SC Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74ACT

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

Packaging:: Tube

Product Status:: Active

Logic Type:: AND 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:: 9ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

74ACT08SC FAQ

1.How can I place an order for 74ACT08SC through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT08SC 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 74ACT08SC reliable?

The price and inventory of 74ACT08SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT08SC is usually 5 days.

3.What payment methods are accepted for 74ACT08SC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT08SC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT08SC?

74ACT08SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT08SC 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 74ACT08SC?

For technical support, including 74ACT08SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT08SC requirements.

6.How does Aetrix verify that 74ACT08SC is sourced from the original manufacturer or authorized distributors?

All 74ACT08SC 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 74ACT08SC meets industry standards.

7.What is the process for return or replacement of 74ACT08SC?

All 74ACT08SC units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT08SC, 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 74ACT08SC part is unused and in its original packaging.

Return procedure for 74ACT08SC:

1.Submit a request within 90 days.

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

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