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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74ACT241DBR

Name: SN74ACT241DBR
Brand: Texas Instruments
SKU: SN74ACT241DBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ACT241DBR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ACT241DBR.pdf

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

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Product details

Overview

SN74ACT241DBR 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 and embedded systems.

For engineers reviewing the SN74ACT241DBR datasheet, SN74ACT241DBR pinout, SN74ACT241DBR application, or SN74ACT241DBR equivalent, this page provides verified functional modes, real-world timing behavior, package-specific thermal data, and validated alternative options for bus buffering in 5V logic systems.

Technical Context

The SN74ACT241DBR implements two independent 4-bit noninverting buffer sections, each with complementary 3-state control: low on 1OE enables Y1–Y4 outputs from A1–A4 inputs; high on 2OE enables Y1–Y4 outputs from A1–A4 inputs. Outputs enter high-impedance state when respective OE is inactive.

It uses ACT (Advanced CMOS TTL-compatible) logic family architecture, delivering rail-to-rail output swing, ±24mA drive strength, input voltage tolerance beyond V_CC, and guaranteed operation across –40°C to +85°C ambient temperature range - all in a 20-pin SSOP (DB) package with 0.65mm pitch.

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 supply ripple without functional loss.
Max t_pd	8.5ns at 5V - enables reliable operation in high-speed address/data buses up to ~115MHz clock-equivalent timing.
I_OH/I_OL	±24mA - drives standard TTL loads or multiple CMOS inputs without external buffers.
Input Voltage Range	0V to V_CC+0.5V - accepts 5V-tolerant inputs even when V_CC = 4.5V, simplifying mixed-voltage interfacing.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control and instrumentation environments.
Output Enable Logic	Active-low 1OE & active-high 2OE - allows asymmetric bus control (e.g., one side enabled while other tristated).
C_i/C_o	2.5pF / 8pF - low input/output capacitance minimizes signal loading and preserves edge integrity on stubbed buses.

Pinout & Package

SN74ACT241DBR is housed in a 20-pin SSOP (Shrink Small Outline Package), DB variant, with 7.2mm × 7.8mm body size, 0.65mm lead pitch, and 2.0mm max height - optimized for high-density PCB layouts requiring thermal efficiency and reflow compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1OE	Active-low output enable (Group 1)	Drives Y1–Y4 high-impedance when high; enables noninverted A1–A4 → Y1–Y4 path when low.
1A1–1A4	Group 1 input terminals	Accept TTL/CMOS logic signals; tolerant to 5.5V regardless of V_CC level.
2Y1–2Y4	Group 2 output terminals	Provide 3-state buffered outputs sourced from 2A1–2A4; sink/source ±24mA.
2OE	Active-high output enable (Group 2)	Drives Y1–Y4 high-impedance when low; enables noninverted A1–A4 → Y1–Y4 path when high.
GND (Pin 10)	Ground reference	Common return for all logic and output current paths; must be low-impedance for noise immunity.
V_CC (Pin 20)	Power supply	Supplies internal logic and output drivers; requires local 0.1µF bypass capacitor per TI layout guidelines.

Key Features

Feature	Design Value
Dual independent 4-bit buffering	Enables simultaneous or staggered control of two 4-bit data paths using separate OE pins - ideal for bidirectional bus arbitration.
TTL-compatible inputs	Accepts standard 0.8V/2.0V logic thresholds and withstands up to 5.5V input voltage - eliminates level-shifting in legacy 5V systems.
Low propagation delay	8.5ns max at 5V ensures timing margin for 100+ MHz bus cycles with setup/hold compliance.
High-output drive capability	±24mA per output supports fan-out to ≥10 standard TTL loads or direct connection to unterminated transmission lines.
3-state output isolation	Guaranteed high-impedance leakage < ±2.5µA prevents bus contention during power-up/down or idle states.

Applications

Memory Address Buffering	System Clock Distribution
Use Scenario: Driving address lines from microcontroller to multiple SRAM or Flash devices sharing a common bus. IC Role / Device Role / Timing Role: Acts as a unidirectional, 3-state address latch buffer that isolates memory banks during chip-select transitions. Use Value: Prevents address glitches during bank switching via fast OE-controlled tristate; 8.5ns delay maintains timing closure in 100MHz+ systems.	Use Scenario: Distributing a master system clock to multiple peripherals (e.g., ADCs, UARTs, timers) with matched skew. IC Role / Device Role / Timing Role: Functions as a low-skew, fan-out clock buffer with independent enable control per group. Use Value: Delivers rail-to-rail 5V clock edges with <10ns delay variation across outputs - critical for synchronous sampling accuracy.
Industrial Bus Transceiver Interface	Legacy Peripheral Expansion
Use Scenario: Interfacing a modern MCU GPIO port to older ISA-style parallel or control buses requiring 5V drive and tristate isolation. IC Role / Device Role / Timing Role: Serves as a logic-level translator and bus driver with OE-synchronized direction control. Use Value: Eliminates need for discrete transceivers; 5.5V-tolerant inputs accept legacy 5V signaling while operating from 4.5–5.5V supply.	Use Scenario: Adding parallel I/O expansion to a single-board computer (e.g., BeagleBone, Raspberry Pi Compute Module) via GPIO header. IC Role / Device Role / Timing Role: Provides eight additional 5V-tolerant, high-drive digital outputs controlled by software-configurable OE pins. Use Value: Enables direct connection to relays, LEDs, or optocouplers without external drivers - reducing BOM count and board area.

Memory Address Buffering

System Clock Distribution

Use Scenario: Driving address lines from microcontroller to multiple SRAM or Flash devices sharing a common bus.

IC Role / Device Role / Timing Role: Acts as a unidirectional, 3-state address latch buffer that isolates memory banks during chip-select transitions.

Use Value: Prevents address glitches during bank switching via fast OE-controlled tristate; 8.5ns delay maintains timing closure in 100MHz+ systems.

Use Scenario: Distributing a master system clock to multiple peripherals (e.g., ADCs, UARTs, timers) with matched skew.

IC Role / Device Role / Timing Role: Functions as a low-skew, fan-out clock buffer with independent enable control per group.

Use Value: Delivers rail-to-rail 5V clock edges with <10ns delay variation across outputs - critical for synchronous sampling accuracy.

Industrial Bus Transceiver Interface

Legacy Peripheral Expansion

Use Scenario: Interfacing a modern MCU GPIO port to older ISA-style parallel or control buses requiring 5V drive and tristate isolation.

IC Role / Device Role / Timing Role: Serves as a logic-level translator and bus driver with OE-synchronized direction control.

Use Value: Eliminates need for discrete transceivers; 5.5V-tolerant inputs accept legacy 5V signaling while operating from 4.5–5.5V supply.

Use Scenario: Adding parallel I/O expansion to a single-board computer (e.g., BeagleBone, Raspberry Pi Compute Module) via GPIO header.

IC Role / Device Role / Timing Role: Provides eight additional 5V-tolerant, high-drive digital outputs controlled by software-configurable OE pins.

Use Value: Enables direct connection to relays, LEDs, or optocouplers without external drivers - reducing BOM count and board area.

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
SN74ACT244DBR	Octal buffer with non-inverting outputs only (no dual-OE architecture); identical V_CC, speed, and drive specs.	Lacks independent group enable control - both halves share same OE polarity and cannot be independently tristated.	Select when simplified single-OE control suffices and dual-group isolation is unnecessary.
74LVC244APW	3.3V-only operation (1.65–3.6V); lower drive (±24mA), faster t_pd (5.2ns), but incompatible with 5V buses.	Requires level-shifting for 5V systems; unsuitable for direct replacement where 5V tolerance or V_CC > 3.6V is required.	Choose only for new 3.3V designs prioritizing lower power and higher speed - not for 5V legacy compatibility.

Compared with SN74ACT241DBR, SN74ACT244DBR offers identical performance but lacks flexible dual-OE control, while 74LVC244APW trades 5V compatibility for lower voltage operation - making SN74ACT241DBR uniquely suited for robust 5V bus isolation with granular enable control.

Availability

SN74ACT241DBR is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interfaces, and embedded memory subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74ACT241DBR 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 innovation in high-reliability logic families.

The SN74ACT241DBR belongs to TI's Advanced CMOS (ACT) logic product line, engineered for high-speed, 5V-tolerant bus interfacing in industrial, computing, and communications equipment where noise immunity and timing precision are critical.

FAQ

What is the maximum operating temperature for SN74ACT241DBR?

The SN74ACT241DBR is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade specification ensures reliable functionality in demanding environments such as factory automation controllers, motor drives, and outdoor instrumentation where thermal stability is essential. The SSOP package's R_θJA of 70°C/W further supports sustained operation under typical load conditions.

Does SN74ACT241DBR support 5V-tolerant inputs when powered at 4.5V?

Yes, SN74ACT241DBR supports input voltages up to V_CC + 0.5V, meaning it accepts 5.0V signals even when V_CC = 4.5V. This 5V-tolerance is inherent to the ACT logic family and eliminates the need for external level shifters when interfacing with legacy 5V peripherals - a key advantage confirmed in Section 4.2 of the TI datasheet.

How does the dual output-enable architecture of SN74ACT241DBR differ from SN74ACT244DBR?

SN74ACT241DBR features two independent output-enable inputs - active-low 1OE and active-high 2OE - allowing asymmetric control of two 4-bit groups. In contrast, SN74ACT244DBR uses a single active-low OE for all eight outputs. This makes SN74ACT241DBR uniquely capable of enabling one group while tristating the other, enabling advanced bus arbitration schemes not possible with SN74ACT244DBR.

What is the recommended bypass capacitor for SN74ACT241DBR?

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 SN74ACT241DBR. This placement minimizes high-frequency supply noise and ensures clean switching transitions. For systems with multiple V_CC connections, TI advises adding localized 0.01µF–0.022µF capacitors per power terminal - guidance explicitly stated in Section 7.1 of the official datasheet.

Is SN74ACT241DBR pin-compatible with other package variants like SN74ACT241DWR?

Yes, SN74ACT241DBR (SSOP-20) shares identical pin configuration and function mapping with SN74ACT241DWR (SOIC-20), SN74ACT241NSR (SOP-20), and SN74ACT241PWR (TSSOP-20). All variants use the same 20-pin layout defined in Figure 3-2 of the datasheet, including identical pin numbering, signal assignments, and electrical behavior - enabling drop-in substitution across packages where board space and thermal requirements permit.

SN74ACT241DBR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

Package/Case:: 20-SSOP (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-SSOP

SN74ACT241DBR FAQ

1.How can I place an order for SN74ACT241DBR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ACT241DBR 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 SN74ACT241DBR reliable?

The price and inventory of SN74ACT241DBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT241DBR is usually 5 days.

3.What payment methods are accepted for SN74ACT241DBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT241DBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ACT241DBR?

SN74ACT241DBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ACT241DBR 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 SN74ACT241DBR?

For technical support, including SN74ACT241DBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT241DBR requirements.

6.How does Aetrix verify that SN74ACT241DBR is sourced from the original manufacturer or authorized distributors?

All SN74ACT241DBR 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 SN74ACT241DBR meets industry standards.

7.What is the process for return or replacement of SN74ACT241DBR?

All SN74ACT241DBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT241DBR, 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 SN74ACT241DBR part is unused and in its original packaging.

Return procedure for SN74ACT241DBR:

1.Submit a request within 90 days.

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

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