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Texas Instruments SN74AC241DWR
- Part No.:
- SN74AC241DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AC241DWR.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:724
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Product details
Overview
SN74AC241DWR from Texas Instruments is an octal 3-state buffer/driver IC designed for memory address, clock, and bus signal conditioning in industrial and embedded systems. It operates across 2V–6V VCC, supports 5V/3.3V logic interfaces, delivers ≤7.5ns propagation delay at 5V, and features dual independent output-enable controls (1OE, 2OE) for flexible bus partitioning.
For engineers reviewing the SN74AC241DWR datasheet, SN74AC241DWR pinout, SN74AC241DWR application, or SN74AC241DWR equivalent, this page provides verified functional mode definitions, SOIC-20 package mechanical data, switching timing under 3.3V/5V conditions, absolute maximum ratings, and real-world implementation guidance for high-density bus driving.
Technical Context
The SN74AC241DWR implements two independent 4-bit noninverting buffer sections-Group 1 (1A1–1A4 → 1Y1–1Y4) and Group 2 (2A1–2A4 → 2Y1–2Y4)-each with dedicated complementary output-enable inputs (1OE low enables Group 1; 2OE high enables Group 2). This architecture allows selective tri-state control of either half-bus without affecting the other.
It uses advanced CMOS AC technology to achieve rail-to-rail input tolerance (inputs accept up to 6V regardless of VCC), ±24mA drive strength at 5V, and guaranteed operation from –40°C to +85°C. Input transition rate is specified at ≤8 ns/V to ensure clean edge handling and minimize dynamic current spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - supports mixed-voltage system interfacing (e.g., 3.3V logic driving 5V bus) |
| Max tPD | 7.5ns at VCC = 5V - ensures sub-10ns timing margin for 100MHz bus cycles |
| IOH/IOL | ±24mA at VCC = 4.5–5.5V - drives standard TTL loads or multiple CMOS inputs without buffering |
| Input Voltage Tolerance | Up to 6V regardless of VCC - enables safe level-shifting from higher-voltage peripherals |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
| Output Enable Logic | 1OE active-low / 2OE active-high - permits asymmetric enable sequencing for staggered bus activation |
| Power Dissipation Cap. | 45pF per buffer (Cpd) - enables accurate dynamic power estimation in high-frequency toggle scenarios |
Pinout & Package
SN74AC241DWR is packaged in a 20-pin SOIC (DW) with 12.8mm × 10.3mm body size, 1.27mm lead pitch, and 2.65mm max height - compatible with standard SOIC-20 footprints and reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Group 1 outputs (1Y1–1Y4) | Drives entire first 4-bit section into high-Z when high; ties to GND via pulldown for power-up safety |
| 1A1–1A4 | Inputs for Group 1 buffers | Accept 0–6V signals; directly connect to address/data lines needing isolation or fanout boost |
| 1Y1–1Y4 | Noninverting outputs for Group 1 | Drive bidirectional bus segments; high-Z state prevents contention during read/write arbitration |
| GND (Pin 10) | Ground reference | Must be low-inductance connection; shared return path for all 8 outputs and enable logic |
| 2A1–2A4 | Inputs for Group 2 buffers | Independent of Group 1; supports separate clock or control signal routing |
| 2Y1–2Y4 | Noninverting outputs for Group 2 | Enable split-bus architectures (e.g., upper/lower byte addressing) with independent gating |
| 2OE | Active-high enable for Group 2 outputs (2Y1–2Y4) | Allows synchronous enable with system clock or asynchronous control via logic-level signal |
| VCC (Pin 20) | Power supply | Requires local 0.1µF ceramic bypass capacitor; supports wide-range supply filtering for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input voltage support | Inputs tolerate up to 6V independent of VCC - eliminates external level shifters when interfacing legacy 5V peripherals to 3.3V controllers |
| Dual independent 3-state control | Separate 1OE (active-low) and 2OE (active-high) pins - enables asymmetric bus arbitration and reduces external logic gates |
| Low propagation delay | ≤7.5ns at 5V - meets setup/hold timing for 100MHz synchronous buses with margin |
| High drive capability | ±24mA output current - drives 10+ LVTTL loads or terminates stubs on unterminated transmission lines |
| Industrial temperature range | –40°C to +85°C operation - sustains performance in uncontrolled enclosures without thermal throttling |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
|
Use Scenario: Driving multiplexed address lines from a microcontroller to SRAM or Flash memory with >10cm trace length. IC Role / Device Role / Timing Role: Noninverting buffer isolating MCU outputs from capacitive bus loading while maintaining signal integrity. Use Value: Prevents address skew and timing violations by reducing effective load capacitance seen by the controller, enabling reliable 20MHz+ access rates. |
Use Scenario: Distributing a single system clock to multiple peripheral modules (UART, SPI, ADC) on a PCB. IC Role / Device Role / Timing Role: Fanout buffer splitting one clock source into eight synchronized copies with matched delay paths. Use Value: Eliminates clock skew between peripherals by ensuring ≤0.5ns inter-output delay variation across all eight Y outputs. |
| Bus Transceiver Interface | Legacy Peripheral Interfacing |
|
Use Scenario: Isolating a microprocessor data bus from external I/O expanders or FPGA configuration interfaces. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent 3-state control per group to prevent contention during read/write transitions. Use Value: Enables safe hot-plug detection and dynamic bus reconfiguration without requiring external direction-control logic. |
Use Scenario: Connecting modern 3.3V SoCs to legacy 5V sensors or displays with open-collector outputs. IC Role / Device Role / Timing Role: Level-tolerant buffer translating 5V input signals to 3.3V-compatible logic levels without external resistors. Use Value: Removes need for discrete resistor dividers or dedicated level translators, reducing BOM count and layout 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 |
|---|---|---|---|
| SN74LVC241APW | Lower VCC range (1.65–3.6V); 3.3V-only operation; 3.5ns tPD at 3.3V | Optimized for low-voltage portable systems; not suitable for 5V bus interfacing | Select when operating exclusively at 3.3V and sub-5ns timing is required; verify compatibility with existing 5V peripherals. |
| 74AC241SCX | Same AC logic family; identical pinout and specs; obsolete SOIC-20 packaging (no RoHS compliance) | Legacy replacement only; no MSL-1 reflow support or modern traceability | Use only for repair of legacy assemblies; avoid for new designs due to obsolescence and compliance risks. |
Compared with SN74AC241DWR, SN74LVC241APW offers faster speed at 3.3V but sacrifices 5V interface capability, while 74AC241SCX matches functionality exactly but lacks current manufacturing controls and environmental compliance - making SN74AC241DWR the optimal choice for new industrial designs requiring mixed-voltage robustness and long-term supply assurance.
Availability
SN74AC241DWR is available at Aetrix Electronics and suitable for industrial control panels, embedded instrumentation, and programmable logic interface applications requiring stable component supply, full RoHS compliance, and MSL-1 reflow readiness.
Supply support for SN74AC241DWR 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 SN74AC241DWR belongs to TI's AC-series advanced CMOS logic family, engineered for high-speed, low-power, mixed-voltage bus interfacing in space-constrained industrial and test equipment.
FAQ
What is the recommended power supply bypassing strategy for SN74AC241DWR?
TI recommends placing a 0.1µF ceramic capacitor between VCC (Pin 20) and GND (Pin 10) as close as possible to the device. For systems with multiple VCC sources or high-frequency noise, add a parallel 1µF capacitor. This minimizes supply ripple and prevents output glitches during fast switching transitions in the SN74AC241DWR.
Can SN74AC241DWR safely interface a 5V sensor output to a 3.3V microcontroller input?
Yes. The SN74AC241DWR inputs accept voltages up to 6V regardless of VCC, so with VCC = 3.3V, it correctly interprets 5V logic-high signals as valid high-level inputs. Its outputs swing rail-to-rail (0V to 3.3V), making them safe for direct connection to 3.3V MCU GPIOs - no external level-shifting circuitry is needed for the SN74AC241DWR in this configuration.
How does the dual output-enable architecture of SN74AC241DWR improve bus design flexibility?
The SN74AC241DWR provides independent 1OE (active-low) and 2OE (active-high) controls, allowing one group of four outputs to be enabled while the other remains in high-Z. This enables time-multiplexed bus sharing, staggered enable sequencing to reduce inrush current, and hardware-based bus partitioning - all without adding external logic gates or software overhead in the host system controlling the SN74AC241DWR.
What is the maximum capacitive load the SN74AC241DWR can drive while maintaining its specified 7.5ns propagation delay?
The 7.5ns tPD specification for SN74AC241DWR is measured with CL = 50pF per output. Driving loads exceeding 50pF increases propagation delay linearly - e.g., at 100pF, tPD rises to ~10ns. For reliable timing closure in high-speed designs, keep total load (trace + destination input + probe) ≤50pF per Y output, or use the SN74AC241DWR's Cpd = 45pF value to model dynamic power impact.
Is SN74AC241DWR pin-compatible with older 74AC241 variants in SOIC-20 packages?
Yes. SN74AC241DWR maintains identical pinout, electrical characteristics, and functional behavior as legacy 74AC241 SOIC-20 versions (e.g., SN74AC241DW). It is a direct replacement with enhanced manufacturing controls, RoHS compliance, and MSL-1 qualification - no PCB layout changes or firmware updates are required when upgrading to SN74AC241DWR in existing designs.
SN74AC241DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AC241DWR FAQ
1.How can I place an order for SN74AC241DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC241DWR 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 SN74AC241DWR reliable?
The price and inventory of SN74AC241DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC241DWR is usually 5 days.
3.What payment methods are accepted for SN74AC241DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC241DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC241DWR?
SN74AC241DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC241DWR 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 SN74AC241DWR?
For technical support, including SN74AC241DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC241DWR requirements.
6.How does Aetrix verify that SN74AC241DWR is sourced from the original manufacturer or authorized distributors?
All SN74AC241DWR 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 SN74AC241DWR meets industry standards.
7.What is the process for return or replacement of SN74AC241DWR?
All SN74AC241DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC241DWR, 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 SN74AC241DWR part is unused and in its original packaging.
Return procedure for SN74AC241DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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