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Texas Instruments SN74ACT241NSR

Name: SN74ACT241NSR
Brand: Texas Instruments
SKU: SN74ACT241NSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ACT241NSR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.209", 5.30mm Width)

Datasheet:: SN74ACT241NSR.pdf

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

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Product details

Overview

SN74ACT241NSR 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 embedded systems.

For engineers reviewing the SN74ACT241NSR datasheet, SN74ACT241NSR pinout, SN74ACT241NSR application, or SN74ACT241NSR equivalent, this page provides verified functional modes, switching characteristics, thermal metrics, and SOP-20 package-specific layout guidance - all confirmed for the active production part with NS (SOP) packaging, RoHS compliance, and –40°C to +85°C operation.

Technical Context

The SN74ACT241NSR implements two independent 4-bit noninverting buffer sections, each with dedicated complementary output-enable inputs (1OE active-low, 2OE active-high). Its ACT logic family ensures TTL-level input compatibility while driving CMOS loads with rail-to-rail output swing.

Switching performance is characterized at 5V ±0.5V with t_PLH/t_PHL ≤9.5ns (max), t_PZH/t_PZL ≤10ns (max), and t_PHZ/t_PLZ ≤10.5ns (max); power dissipation capacitance is 45pF per buffer at 1MHz/50pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5V to 5.5V - Ensures stable operation across standard 5V supply rails with ±10% tolerance.
Max Propagation Delay	8.5ns at 5V - Enables high-speed data routing in memory address and clock distribution paths.
Output Drive Strength	±24mA at V_CC = 5V - Sufficient to drive 50Ω transmission lines or multiple CMOS inputs without signal degradation.
Input Voltage Tolerance	Up to 5.5V - Allows interfacing with 5V-tolerant I/Os even when V_CC = 4.5V, simplifying mixed-voltage system design.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded applications including PLCs and motor controllers.
Power Dissipation Capacitance	45pF per buffer - Predictable dynamic power consumption for thermal modeling in dense PCB layouts.
3-State Leakage Current	±2.5µA max at V_CC = 5.5V - Minimizes bus contention current during high-impedance state, critical for shared data bus integrity.

Pinout & Package

SOP-20 (NS) package: 12.6mm × 7.8mm body size, 12.6mm × 5.3mm footprint excluding leads, 1.27mm pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OE	Active-low output enable (Section 1)	Drives Y1–Y4 outputs to high-impedance when high; ties to V_CC via pullup for safe power-up state.
1A1–1A4	Inputs for first 4-bit buffer section	Noninverting data inputs routed to 1Y1–1Y4 when 1OE = low; TTL-compatible voltage thresholds.
1Y1–1Y4	Outputs for first 4-bit buffer section	3-state outputs with ±24mA drive; high-impedance when 1OE = high or 2OE = low.
2OE	Active-high output enable (Section 2)	Drives Y1–Y4 outputs to high-impedance when low; ties to GND via pulldown for safe power-down behavior.
2A1–2A4	Inputs for second 4-bit buffer section	Noninverting data inputs routed to 2Y1–2Y4 when 2OE = high; identical electrical specs to 1Ax pins.
2Y1–2Y4	Outputs for second 4-bit buffer section	3-state outputs with same timing and drive as 1Yx; enables independent control of two 4-bit buses.
GND (Pin 10)	Ground reference	Common return path for all internal logic and output drivers; requires low-inductance connection to PCB ground plane.
V_CC (Pin 20)	Power supply	5V nominal supply; requires local 0.1µF ceramic bypass capacitor placed within 5mm of pin per TI layout guidelines.

Key Features

Feature	Design Value
Dual independent 4-bit buffers	Enables simultaneous control of two separate 4-bit data paths using 1OE and 2OE, reducing external logic count in bus arbitration circuits.
TTL-compatible inputs at 5V	Accepts standard TTL logic levels (V_IL ≤ 0.8V, V_IH ≥ 2.0V) while operating from 4.5V–5.5V V_CC, eliminating level-shifter requirements in legacy 5V systems.
≤8.5ns propagation delay	Supports >100MHz clock distribution and address strobing in microcontroller peripherals and FPGA I/O expansion interfaces.
High-impedance output state	Ensures zero DC loading on shared buses during disable, preventing contention and enabling hot-swap capability in modular backplane designs.
Low dynamic power consumption	45pF power dissipation capacitance per buffer allows predictable thermal rise in high-density packages like SOP-20, supporting compact industrial PCB layouts.

Applications

Memory Address Buffering	Clock Distribution
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash memory devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating MCU address outputs from memory device inputs, with 1OE/2OE enabling selective chip enable sequencing. Use Value: Prevents address bus contention during memory access arbitration; ≤8.5ns delay maintains setup/hold timing margins for 25MHz+ memory cycles.	Use Scenario: Distributing a master system clock to multiple peripheral ICs (e.g., ADCs, DACs, UARTs) with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew clock driver providing fanout of up to eight loads while maintaining signal integrity and edge rate control. Use Value: ±24mA drive strength sustains fast edge rates over 50Ω PCB traces; 45pF C_pd minimizes jitter accumulation in multi-stage clock trees.
Industrial Bus Interface	Legacy System Interfacing
Use Scenario: Isolating Modbus RTU or CAN controller I/O from noisy field-side transceivers in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus buffer with controlled 3-state enable timing, decoupling controller logic from ESD-prone field wiring. Use Value: High-impedance state prevents latch-up during transceiver fault conditions; 5.5V-tolerant inputs withstand induced transients on unpowered segments.	Use Scenario: Interfacing modern 3.3V microcontrollers with legacy 5V TTL peripherals (e.g., parallel LCDs, EPROM programmers). IC Role / Device Role / Timing Role: Level-translating buffer accepting 3.3V logic highs (≥2.0V) and driving 5V-tolerant outputs, eliminating discrete resistor networks. Use Value: Eliminates need for external level shifters; TTL-compatible inputs ensure reliable recognition of 3.3V logic signals without additional biasing.

Memory Address Buffering

Clock Distribution

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash memory devices on a shared bus.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating MCU address outputs from memory device inputs, with 1OE/2OE enabling selective chip enable sequencing.

Use Value: Prevents address bus contention during memory access arbitration; ≤8.5ns delay maintains setup/hold timing margins for 25MHz+ memory cycles.

Use Scenario: Distributing a master system clock to multiple peripheral ICs (e.g., ADCs, DACs, UARTs) with matched trace lengths.

IC Role / Device Role / Timing Role: Low-skew clock driver providing fanout of up to eight loads while maintaining signal integrity and edge rate control.

Use Value: ±24mA drive strength sustains fast edge rates over 50Ω PCB traces; 45pF C_pd minimizes jitter accumulation in multi-stage clock trees.

Industrial Bus Interface

Legacy System Interfacing

Use Scenario: Isolating Modbus RTU or CAN controller I/O from noisy field-side transceivers in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional bus buffer with controlled 3-state enable timing, decoupling controller logic from ESD-prone field wiring.

Use Value: High-impedance state prevents latch-up during transceiver fault conditions; 5.5V-tolerant inputs withstand induced transients on unpowered segments.

Use Scenario: Interfacing modern 3.3V microcontrollers with legacy 5V TTL peripherals (e.g., parallel LCDs, EPROM programmers).

IC Role / Device Role / Timing Role: Level-translating buffer accepting 3.3V logic highs (≥2.0V) and driving 5V-tolerant outputs, eliminating discrete resistor networks.

Use Value: Eliminates need for external level shifters; TTL-compatible inputs ensure reliable recognition of 3.3V logic signals without additional biasing.

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
SN74ACT240NSR	Inverting output logic (A→¬Y) vs. noninverting (A→Y) in SN74ACT241NSR; otherwise identical pinout, timing, and drive specs.	Required where bus polarity inversion is needed (e.g., differential pair termination, inverted enable signaling).	Select SN74ACT240NSR only when inversion is functionally required; no PCB change needed due to pin-to-pin compatibility.
SN74LVC244APWR	Lower V_CC range (1.65V–3.6V), 3.6V-tolerant inputs, 24mA drive, but 10ns max t_pd at 3.3V - slower than SN74ACT241NSR at 5V.	Targeted at 3.3V-only systems; not suitable for 5V bus interfacing without level translation.	Choose SN74LVC244APWR for new 3.3V designs prioritizing lower power; avoid for 5V legacy integration where SN74ACT241NSR's 5V tolerance and speed are essential.

Compared with SN74ACT241NSR, SN74ACT240NSR offers identical mechanical and electrical compatibility with functional inversion, while SN74LVC244APWR trades 5V operation and sub-9ns speed for 3.3V efficiency - making the former a drop-in replacement and the latter a system-voltage-dependent alternative.

Availability

SN74ACT241NSR is available at Aetrix Electronics and suitable for industrial automation, embedded controller design, and legacy 5V system upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOP-20 packaging.

Supply support for SN74ACT241NSR 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 decades of experience in high-reliability industrial and automotive ICs.

The SN74ACT241NSR belongs to TI's ACT (Advanced CMOS TTL-compatible) logic family, engineered for robust 5V system interfacing with high noise immunity, fast switching, and guaranteed 3-state behavior in demanding industrial environments.

FAQ

What is the maximum operating temperature for SN74ACT241NSR?

The SN74ACT241NSR is rated for continuous operation from –40°C to +85°C ambient temperature, meeting industrial-grade environmental requirements. This specification is validated per JEDEC JESD22-A108 and applies to the SOP-20 (NS) package variant under recommended operating conditions (V_CC = 4.5V–5.5V). Thermal derating is not required within this range.

Does SN74ACT241NSR support 3.3V logic inputs?

Yes - SN74ACT241NSR accepts TTL-compatible input voltages, meaning it reliably recognizes 3.3V logic-high signals (≥2.0V) and 3.3V logic-low signals (≤0.8V) when powered at 4.5V–5.5V. Its input structure is designed for 5V-tolerant operation, so no level-shifting circuitry is needed to interface with 3.3V microcontrollers driving the SN74ACT241NSR inputs.

How should the output-enable pins be biased during power-up?

To guarantee high-impedance outputs at power-up, tie 1OE to V_CC via a pullup resistor (e.g., 10kΩ) and 2OE to GND via a pulldown resistor (e.g., 10kΩ), as specified in TI's SCAS516E datasheet Section 6.1. This prevents bus contention during supply ramp-up, especially critical in systems with asynchronous power sequencing.

Is SN74ACT241NSR pin-compatible with other package variants of the same part number?

Yes - SN74ACT241NSR (SOP-20) shares identical pin configuration and function mapping with SN74ACT241N (PDIP-20), SN74ACT241DWR (SOIC-20), and SN74ACT241PWR (TSSOP-20), as confirmed in Table 3-1 and Figure 3-2 of the SCAS516E datasheet. All variants use the same 20-pin dual-in-line pinout with identical terminal assignments.

What is the recommended bypass capacitor for SN74ACT241NSR?

Texas Instruments recommends a 0.1µF ceramic capacitor placed as close as possible to the V_CC (Pin 20) and GND (Pin 10) pins of the SN74ACT241NSR. This minimizes high-frequency supply noise and stabilizes switching transients; placement within 5mm of the pins and direct connection to solid ground plane are critical for optimal performance.

SN74ACT241NSR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

Package/Case:: 20-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

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:: Surface Mount

Supplier Device Package:: 20-SO

SN74ACT241NSR FAQ

1.How can I place an order for SN74ACT241NSR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ACT241NSR 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 SN74ACT241NSR reliable?

The price and inventory of SN74ACT241NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT241NSR is usually 5 days.

3.What payment methods are accepted for SN74ACT241NSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT241NSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ACT241NSR?

SN74ACT241NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ACT241NSR 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 SN74ACT241NSR?

For technical support, including SN74ACT241NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT241NSR requirements.

6.How does Aetrix verify that SN74ACT241NSR is sourced from the original manufacturer or authorized distributors?

All SN74ACT241NSR 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 SN74ACT241NSR meets industry standards.

7.What is the process for return or replacement of SN74ACT241NSR?

All SN74ACT241NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT241NSR, 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 SN74ACT241NSR part is unused and in its original packaging.

Return procedure for SN74ACT241NSR:

1.Submit a request within 90 days.

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

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