My Inquiry
My Account
Texas Instruments SN74ACT241DW
- Part No.:
- SN74ACT241DW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ACT241DW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:755
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ACT241DW from Texas Instruments is an octal noninverting buffer/driver with dual 3-state outputs, designed for memory address and bus driving in 5V TTL-compatible systems. It operates from 4.5V to 5.5V VCC, delivers 8.5ns max propagation delay at 5V, supports 24mA output drive, and features independent output-enable controls (1OE, 2OE) for bidirectional bus management in industrial control backplanes.
For engineers reviewing the SN74ACT241DW datasheet, SN74ACT241DW pinout, SN74ACT241DW application, or SN74ACT241DW equivalent, this page provides verified functional mode definitions, SOIC-20 package mechanical data, switching characteristics under 5V operation, and validated alternatives for 3-state logic bus interface replacement.
Technical Context
The SN74ACT241DW implements two independent 4-bit noninverting buffer sections, each with complementary 3-state control: 1OE enables Y1–Y4 when low; 2OE enables Y1–Y4 when high. Outputs enter high-impedance state when respective OE is inactive, enabling bidirectional data flow on shared buses without contention.
It uses ACT (Advanced CMOS TTL-compatible) logic with input thresholds matching standard TTL (VIL = 0.8V, VIH = 2.0V), rail-to-rail input voltage tolerance up to 5.5V, and guaranteed 24mA sink/source capability per output at VCC = 5V - supporting direct interfacing with legacy TTL loads and modern 5V microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - ensures compatibility with regulated 5V supply rails and tolerates ±5% variation without functional degradation. |
| Max tpd | 8.5ns at 5V - enables reliable operation in high-speed address/data bus applications up to ~115MHz clock-equivalent timing. |
| IOH/IOL | ±24mA - drives standard TTL loads (10 LSTTL units) directly; eliminates need for external pull-up/pull-down resistors in most bus configurations. |
| Input Compatibility | TTL-compatible (VIH = 2.0V, VIL = 0.8V) - interoperates seamlessly with legacy 74LS/74ALS logic and microcontroller GPIOs without level-shifting. |
| Output Enable Logic | 1OE active-low, 2OE active-high - allows flexible bus arbitration: one section can be enabled while the other remains tri-stated for half-duplex control. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including programmable logic controllers and motor drive I/O modules. |
| Package | SOIC-20 (DW) - 12.8mm × 10.3mm body size, surface-mount compatible with standard reflow profiles (MSL Level-1). |
Pinout & Package
SN74ACT241DW is housed in a 20-pin SOIC (DW) package with 1.27mm pitch, 2.65mm maximum height, and JEDEC MS-013 compliant outline. Pin 1 is located at the top-left corner with notch or index mark indication.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-low output enable for Y1–Y4; asserts low to pass A1–A4 inputs to outputs. |
| 2 | 1A1 | Input for first buffer channel; connects to source signal for Y1 output. |
| 3 | 2Y4 | Output for second buffer channel; driven by 2A4 when 2OE is high. |
| 4 | 1A2 | Input for first buffer channel; connects to source signal for Y2 output. |
| 5 | 2Y3 | Output for second buffer channel; driven by 2A3 when 2OE is high. |
| 6 | 1A3 | Input for first buffer channel; connects to source signal for Y3 output. |
| 7 | 2Y2 | Output for second buffer channel; driven by 2A2 when 2OE is high. |
| 8 | 1A4 | Input for first buffer channel; connects to source signal for Y4 output. |
| 9 | 2Y1 | Output for second buffer channel; driven by 2A1 when 2OE is high. |
| 10 | GND | Ground reference for all logic and power domains; must be low-impedance connection. |
| 11 | 2A1 | Input for second buffer channel; connects to source signal for Y1 output. |
| 12 | 1Y4 | Output for first buffer channel; driven by 1A4 when 1OE is low. |
| 13 | 2A2 | Input for second buffer channel; connects to source signal for Y2 output. |
| 14 | 1Y3 | Output for first buffer channel; driven by 1A3 when 1OE is low. |
| 15 | 2A3 | Input for second buffer channel; connects to source signal for Y3 output. |
| 16 | 1Y2 | Output for first buffer channel; driven by 1A2 when 1OE is low. |
| 17 | 2A4 | Input for second buffer channel; connects to source signal for Y4 output. |
| 18 | 1Y1 | Output for first buffer channel; driven by 1A1 when 1OE is low. |
| 19 | 2OE | Active-high output enable for Y1–Y4; asserts high to pass A1–A4 inputs to outputs. |
| 20 | VCC | Positive supply rail; requires local 0.1µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit buffers | Enables simultaneous or staggered control of two 4-bit data paths (e.g., address vs. data bus segments) using separate OE signals. |
| 3-state outputs with fast enable/disable | tPZH/tPZL ≤ 10ns ensures minimal bus turnaround time during direction switching in bidirectional interfaces. |
| TTL-compatible inputs | Accepts standard TTL logic levels without external biasing - simplifies integration with legacy 74LS, microcontrollers, and FPGAs. |
| Rail-to-rail input voltage range | Supports inputs up to 5.5V regardless of VCC, allowing safe interfacing with overvoltage-tolerant peripherals or hot-swap scenarios. |
| Low quiescent current | ICC ≤ 40µA at 5.5V - reduces static power consumption in always-on industrial control modules. |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
|
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 buffer with 3-state outputs isolates address lines during read/write cycles and prevents bus contention. Use Value: 8.5ns propagation delay ensures setup/hold timing margins are maintained across 5V address decoding paths at ≥10MHz system clocks. |
Use Scenario: Expanding GPIO count of an MCU by connecting parallel I/O ports to peripheral devices via a shared data bus. IC Role / Device Role / Timing Role: Bidirectional bus driver controlled by separate OE pins to manage data flow direction between master and slave peripherals. Use Value: Independent 1OE/2OE control allows one 4-bit segment to transmit while another receives, enabling full-duplex-like operation without additional logic. |
| Industrial Backplane Interface | Legacy System Bus Repeater |
|
Use Scenario: Interfacing PLC CPU modules with distributed I/O racks over long PCB traces or ribbon cables. IC Role / Device Role / Timing Role: Signal repeater that restores logic levels and drive strength degraded by trace capacitance and noise coupling. Use Value: ±24mA output drive compensates for >100pF load capacitance, maintaining clean edges across 15cm+ backplane runs. |
Use Scenario: Replacing obsolete 74LS241 in retro-computing or test equipment where pin compatibility and electrical behavior must match exactly. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical pinout, logic function, and 3-state timing behavior. Use Value: TTL-compatible inputs and 5V-only operation preserve original system timing margins without board redesign or firmware changes. |
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 |
|---|---|---|---|
| SN74ACT244DW | Noninverting octal buffer with *two* active-low OE inputs (1OE, 2OE), same pinout and AC/DC specs as SN74ACT241DW. | Functionally identical - differs only in internal logic mapping (244 has both OEs active-low; 241 has 1OE low / 2OE high). | Select SN74ACT244DW if system design uses active-low OE control exclusively; verify OE polarity alignment in existing firmware/hardware. |
| SN74LVC244APW | 3.3V-only operation (1.65–3.6V), lower drive (24mA), but pin-compatible in TSSOP-20; not 5V tolerant on inputs. | Requires level translation when interfacing with 5V buses; unsuitable for direct 5V TTL replacement without external circuitry. | Choose only for new 3.3V designs where power efficiency and smaller TSSOP footprint outweigh voltage compatibility constraints. |
Compared with SN74ACT241DW, SN74ACT244DW offers identical 5V performance and pinout with simplified OE polarity, while SN74LVC244APW enables lower-voltage operation at the cost of 5V bus compatibility - making SN74ACT241DW the optimal choice for industrial 5V bus isolation and expansion.
Availability
SN74ACT241DW is available at Aetrix Electronics and suitable for industrial control backplanes, microcontroller bus expansion, and legacy system upgrades requiring stable component supply and long-term lifecycle support.
Supply support for SN74ACT241DW 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74ACT241DW belongs to TI's Advanced CMOS (ACT) logic family, engineered for high-speed, TTL-compatible 5V digital interfacing in noise-immune industrial environments where reliability and timing precision are critical.
FAQ
What is the operating voltage range for SN74ACT241DW?
The SN74ACT241DW operates from 4.5V to 5.5V VCC. This range accommodates standard 5V power supplies with ±5% tolerance and ensures robust functionality across industrial temperature extremes (–40°C to +85°C). Operation outside this range may cause undefined behavior or damage.
How does the output-enable logic work on SN74ACT241DW?
The SN74ACT241DW has two independent output-enable inputs: 1OE (active-low) and 2OE (active-high). When 1OE is low, outputs Y1–Y4 reflect inputs A1–A4; when 2OE is high, outputs Y1–Y4 reflect inputs A1–A4. Both must be inactive to place all eight outputs in high-impedance state.
Can SN74ACT241DW interface directly with 3.3V microcontrollers?
No - SN74ACT241DW is a 5V-only device with TTL-compatible inputs (VIH = 2.0V min). While its inputs accept voltages up to 5.5V, they require ≥2.0V for logic high recognition. Direct connection to 3.3V GPIOs is marginal and not recommended without verification of actual VOH/VOL levels under load.
What is the maximum capacitive load SN74ACT241DW can drive reliably?
SN74ACT241DW maintains specified 8.5ns max tpd and clean edges into 50pF loads per output. With its ±24mA drive strength, it can reliably drive >100pF total bus capacitance (e.g., 15cm PCB traces + multiple IC inputs) while preserving timing margins in industrial backplane applications.
Is SN74ACT241DW pin-compatible with older 74LS241 devices?
Yes - SN74ACT241DW shares identical SOIC-20 pinout and functional block diagram with 74LS241, including dual 4-bit noninverting buffers with 3-state outputs. However, SN74ACT241DW offers faster speed (8.5ns vs. 22ns), higher drive (24mA vs. 8mA), and improved noise immunity due to ACT technology.
SN74ACT241DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-SOIC
SN74ACT241DW FAQ
1.How can I place an order for SN74ACT241DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT241DW 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 SN74ACT241DW reliable?
The price and inventory of SN74ACT241DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT241DW is usually 5 days.
3.What payment methods are accepted for SN74ACT241DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT241DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT241DW?
SN74ACT241DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT241DW 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 SN74ACT241DW?
For technical support, including SN74ACT241DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT241DW requirements.
6.How does Aetrix verify that SN74ACT241DW is sourced from the original manufacturer or authorized distributors?
All SN74ACT241DW 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 SN74ACT241DW meets industry standards.
7.What is the process for return or replacement of SN74ACT241DW?
All SN74ACT241DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT241DW, 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 SN74ACT241DW part is unused and in its original packaging.
Return procedure for SN74ACT241DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ACT241DW Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
