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Texas Instruments SN74ACT241N

Name: SN74ACT241N
Brand: Texas Instruments
SKU: SN74ACT241N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ACT241N

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-DIP (0.300", 7.62mm)

Datasheet:: SN74ACT241N.pdf

Description:: IC BUFF NON-INVERT 5.5V 20DIP

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Product details

Overview

SN74ACT241N from Texas Instruments is an octal 3-state buffer/driver IC designed for memory address, clock, and bus interface applications. It operates at 4.5V–5.5V V_CC, supports TTL-compatible inputs up to 5.5V, delivers ≤8.5ns propagation delay at 5V, and features dual independent output-enable controls (1OE, 2OE) for flexible bus management in industrial control and data acquisition systems.

For engineers reviewing the SN74ACT241N datasheet, SN74ACT241N pinout, SN74ACT241N application, or SN74ACT241N equivalent, this page provides verified functional modes, real-world timing behavior, package-specific thermal resistance (R_θJA = 69°C/W), and validated alternatives for bus buffering in legacy 5V logic designs.

Technical Context

The SN74ACT241N implements two independent 4-bit noninverting buffers, each with complementary 3-state control: 1OE enables outputs 1Y1–1Y4 when low; 2OE enables outputs 2Y1–2Y4 when high. Its ACT (Advanced CMOS TTL-compatible) logic family ensures robust noise immunity and rail-to-rail input voltage tolerance (0–5.5V).

Switching performance is characterized across temperature (–40°C to +85°C) and supply (4.5V–5.5V), with t_PLH/t_PHL ≤9.5ns max and t_PZH/t_PZL ≤10.5ns max at 5V. Output drive capability is ±24mA at V_CC = 4.5V, supporting direct connection to standard 50Ω transmission lines or TTL loads without external termination.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5V to 5.5V - Ensures compatibility with standard 5V logic rails and tolerates ±5% supply variation without functional degradation.
Max Propagation Delay	8.5ns at 5V - Enables reliable operation in high-speed address/data buses up to ~115MHz clock-equivalent timing.
Output Drive Strength	±24mA at 4.5V - Sufficient to drive 10+ TTL loads or terminate 50Ω traces without signal integrity loss.
Input Voltage Tolerance	0V to 5.5V - Allows interfacing with overvoltage-tolerant peripherals or mixed-voltage subsystems without level shifters.
3-State Leakage (I_OZ)	±2.5µA at 5.5V - Guarantees minimal bus contention current during high-impedance state, critical for multi-driver arbitration.
Power Dissipation Cap.	45pF per buffer - Predictable dynamic power consumption for thermal modeling in dense PCB layouts.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded systems including programmable logic controllers and instrumentation.

Pinout & Package

SN74ACT241N uses a 20-pin plastic dual in-line package (PDIP, N), body size 24.33mm × 6.35mm, with through-hole mounting and 2.54mm lead pitch. Thermal resistance R_θJA = 69°C/W enables stable operation at full drive under natural convection.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	1OE, 2OE	Active-low and active-high output enable controls - Enable independent gating of two 4-bit output groups for time-multiplexed bus access.
2, 4, 6, 8, 11, 13, 15, 17	1A1–1A4, 2A1–2A4	Buffer input terminals - Accept TTL/CMOS logic levels; tolerate up to 5.5V regardless of V_CC.
3, 5, 7, 9, 12, 14, 16, 18	2Y4–2Y1, 1Y4–1Y1	3-state buffered outputs - Present high-impedance (Z) when respective OE is inactive, preventing bus conflicts.
10, 20	GND, V_CC	Power reference and supply - Requires local 0.1µF bypass capacitor at V_CC pin to suppress switching noise.

Key Features

Feature	Design Value
Dual independent 3-state control	Separate 1OE (active-low) and 2OE (active-high) pins allow asymmetric bus arbitration-e.g., one group enabled while the other remains high-Z during read/write cycles.
TTL-compatible inputs	VIH = 2.0V min, VIL = 0.8V max at 4.5V V_CC - Ensures reliable recognition of legacy TTL outputs without pull-up resistors or level translation.
High noise immunity	Input hysteresis and ACT logic design provide >0.4V noise margin at V_CC = 5V - Critical for noisy industrial environments with EMI from motors or relays.
Low quiescent current	I_CC = 40µA max at 5.5V - Reduces standby power in battery-backed or energy-sensitive systems without sacrificing speed.
Robust ESD protection	±2kV HBM rating - Meets IEC 61000-4-2 Level 2 requirements for handling and board-level reliability in manufacturing and field service.

Applications

Memory Address Buffering	Clock Distribution
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or EPROM chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from memory device inputs, enabling time-multiplexed chip selection via OE control. Use Value: Eliminates address line loading and skew with ≤8.5ns delay, ensuring setup/hold timing margins are preserved across all memory devices.	Use Scenario: Distributing a system clock signal to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew fanout buffer providing eight identical, rail-to-rail clock copies with simultaneous enable/disable control. Use Value: Maintains <100ps inter-output skew and drives 50Ω lines directly, reducing jitter accumulation in precision timing chains.
Industrial Bus Interface	Data Acquisition Front-End
Use Scenario: Interfacing a PLC's backplane bus to modular I/O cards requiring isolated, direction-controlled data transfer. IC Role / Device Role / Timing Role: Bidirectional bus transceiver substitute using dual OE control to manage data flow direction without external direction logic. Use Value: Simplifies PCB layout by replacing discrete direction-control gates; ±24mA drive sustains signal integrity over 15cm ribbon cables.	Use Scenario: Isolating analog front-end multiplexer control signals from digital controller logic in medical or test equipment. IC Role / Device Role / Timing Role: Glitch-free signal conditioning buffer for 4-bit channel select lines, with OE used to freeze selections during conversion windows. Use Value: Prevents spurious channel switching during ADC sampling via synchronized OE assertion, improving measurement repeatability.

Memory Address Buffering

Clock Distribution

Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or EPROM chips on a shared bus.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from memory device inputs, enabling time-multiplexed chip selection via OE control.

Use Value: Eliminates address line loading and skew with ≤8.5ns delay, ensuring setup/hold timing margins are preserved across all memory devices.

Use Scenario: Distributing a system clock signal to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched trace lengths.

IC Role / Device Role / Timing Role: Low-skew fanout buffer providing eight identical, rail-to-rail clock copies with simultaneous enable/disable control.

Use Value: Maintains <100ps inter-output skew and drives 50Ω lines directly, reducing jitter accumulation in precision timing chains.

Industrial Bus Interface

Data Acquisition Front-End

Use Scenario: Interfacing a PLC's backplane bus to modular I/O cards requiring isolated, direction-controlled data transfer.

IC Role / Device Role / Timing Role: Bidirectional bus transceiver substitute using dual OE control to manage data flow direction without external direction logic.

Use Value: Simplifies PCB layout by replacing discrete direction-control gates; ±24mA drive sustains signal integrity over 15cm ribbon cables.

Use Scenario: Isolating analog front-end multiplexer control signals from digital controller logic in medical or test equipment.

IC Role / Device Role / Timing Role: Glitch-free signal conditioning buffer for 4-bit channel select lines, with OE used to freeze selections during conversion windows.

Use Value: Prevents spurious channel switching during ADC sampling via synchronized OE assertion, improving measurement repeatability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LS241N	Lower drive (±15mA), slower (t_pd ≤ 15ns), TTL-input only (no 5.5V tolerance)	Suitable only for legacy 5V-only systems with relaxed timing; incompatible with mixed-voltage or overvoltage interfaces.	Select if cost sensitivity outweighs speed/noise immunity needs and no overvoltage inputs exist.
SN74HC241N	CMOS logic (V_CC = 2–6V), lower drive (±7.8mA), higher t_pd (≤27ns at 4.5V), no TTL input compatibility	Better for wide-supply-range battery-powered designs but insufficient for driving heavy TTL loads or meeting tight timing budgets.	Choose for ultra-low-power applications where bus loading and speed are secondary to supply flexibility.

Compared with SN74LS241N and SN74HC241N, the SN74ACT241N uniquely balances 5V TTL compatibility, 8.5ns speed, and ±24mA drive-making it the only option qualified for industrial 5V bus buffering where both noise immunity and timing margin are non-negotiable.

Availability

SN74ACT241N is available at Aetrix Electronics and suitable for industrial control, legacy instrumentation, and 5V bus interface applications requiring stable component supply across extended product lifecycles.

Supply support for SN74ACT241N 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with over 50 years of industrial-grade component heritage.

The SN74ACT241N belongs to TI's Advanced CMOS (ACT) logic family, engineered specifically for high-speed, noise-immune 5V bus buffering in mission-critical industrial and automotive subsystems.

FAQ

What is the maximum operating temperature range for the SN74ACT241N?

The SN74ACT241N is rated for operation from –40°C to +85°C, meeting industrial temperature requirements. This range is validated per TI's recommended operating conditions and supported by thermal characterization (R_θJA = 69°C/W for PDIP package), ensuring reliable performance in enclosed control cabinets or uncooled factory environments where ambient temperatures exceed commercial limits.

Does the SN74ACT241N require external pull-up or pull-down resistors on its OE pins?

Yes-the SN74ACT241N datasheet recommends tying 1OE to V_CC via a pullup resistor and 2OE to GND via a pulldown resistor to guarantee high-impedance outputs during power-up/power-down sequences. This prevents bus contention before firmware initializes the control lines. Resistor values must respect the driver's sourcing/sinking capability; typical values range from 4.7kΩ to 10kΩ.

Can the SN74ACT241N interface directly with 3.3V logic inputs?

No-the SN74ACT241N inputs are TTL-compatible (VIH = 2.0V min at 4.5V V_CC) but not guaranteed to recognize 3.3V logic HIGH reliably when V_CC = 5V, as VIH scales with supply. For robust 3.3V-to-5V interfacing, a level-shifting buffer or resistor-divider network is required; the SN74ACT241N itself does not provide bidirectional voltage translation.

What is the purpose of separate 1OE and 2OE pins on the SN74ACT241N?

The SN74ACT241N uses complementary OE polarity (1OE active-low, 2OE active-high) to enable independent, asynchronous control of two 4-bit output groups. This allows time-multiplexed bus sharing-e.g., enabling Group 1 during memory reads while holding Group 2 high-Z, then swapping for writes-without external logic or timing constraints imposed by single-OE architectures.

Is the SN74ACT241N RoHS compliant?

Yes-the SN74ACT241N is RoHS compliant, as confirmed in TI's Packaging Information table: "RoHS = Yes", with lead finish specified as NIPDAU (nickel/palladium/gold). This compliance applies to both tube-packaged SN74ACT241N and SN74ACT241N.A variants, supporting environmentally regulated industrial and medical product certifications.

SN74ACT241N Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

Package/Case:: 20-DIP (0.300", 7.62mm)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

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

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 20-PDIP

SN74ACT241N FAQ

1.How can I place an order for SN74ACT241N through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ACT241N 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 SN74ACT241N reliable?

The price and inventory of SN74ACT241N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT241N is usually 5 days.

3.What payment methods are accepted for SN74ACT241N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT241N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ACT241N?

SN74ACT241N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ACT241N 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 SN74ACT241N?

For technical support, including SN74ACT241N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT241N requirements.

6.How does Aetrix verify that SN74ACT241N is sourced from the original manufacturer or authorized distributors?

All SN74ACT241N 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 SN74ACT241N meets industry standards.

7.What is the process for return or replacement of SN74ACT241N?

All SN74ACT241N units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT241N, 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 SN74ACT241N part is unused and in its original packaging.

Return procedure for SN74ACT241N:

1.Submit a request within 90 days.

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

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