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Texas Instruments SN74F241DW
- Part No.:
- SN74F241DW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74F241DW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:348
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Product details
Overview
SN74F241DW from Texas Instruments is a noninverting octal buffer/driver with 3-state outputs, designed for memory address driving and bus interfacing in TTL-compatible systems. It features dual independent 4-bit channels (1A/1Y and 2A/2Y), active-low output-enable (1OE, 2OE), 5 V supply operation, ±64 mA low-level output drive, and 0°C to 70°C industrial temperature range.
For engineers reviewing the SN74F241DW datasheet, SN74F241DW pinout, SN74F241DW application, or SN74F241DW equivalent, this page delivers verified electrical specs, SOIC-20 package details, functional truth table behavior, real-world bus-driving use cases, and validated drop-in alternatives for legacy TTL system upgrades and industrial control designs.
Technical Context
The SN74F241DW implements two independent 4-bit noninverting buffer sections, each with dedicated active-low 3-state enable inputs (1OE, 2OE). Its logic function follows standard positive-logic truth tables: outputs go high-impedance when OE is high, and replicate inputs when OE is low.
It operates strictly within TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V), supports 50 pF capacitive loads, and delivers guaranteed 48–64 mA sink current per output at VO ≤ 0.55 V. Propagation delays are specified from input-to-output (tPLH/tPHL ≤ 6.2 ns) and enable-to-output (tPZL/tPHZ ≤ 7 ns) under 5 V/25°C conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL and LVTTL logic rails without level-shifting. |
| Output Drive (IOL) | 64 mA per output - Sufficient to drive 10 standard TTL loads or terminate short PCB traces on shared buses. |
| Propagation Delay | ≤6.2 ns (tPHL/tPLH) - Enables reliable operation in 80 MHz+ address/data bus timing windows. |
| 3-State Enable Delay | ≤7 ns (tPZL/tPHZ) - Minimizes bus contention risk during rapid direction switching in bidirectional interfaces. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Matches legacy TTL noise margins and eliminates need for external biasing. |
| Operating Temperature | 0°C to 70°C - Qualified for commercial/industrial embedded systems where extended thermal range is not required. |
| Package | SOIC-20 (DW) - Surface-mount footprint compatible with automated assembly; 7.5 mm × 12.8 mm body, 1.27 mm pitch. |
Pinout & Package
SN74F241DW uses a 20-pin SOIC (DW) package with 1.27 mm lead pitch and 2.65 mm max height. Pin 1 is marked by a beveled corner or notch on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable controls first and second 4-bit buffer sections independently. |
| 2, 4, 6, 8 | 1A1–1A4 | Noninverting inputs for channel 1 (drives Y1–Y4). |
| 3, 5, 7, 9 | 2Y4–2Y1 | Inverted-order 3-state outputs for channel 2 (driven by 2A1–2A4 on pins 11, 13, 15, 17). |
| 11, 13, 15, 17 | 2A1–2A4 | Noninverting inputs for channel 2 (drives Y1–Y4 on pins 18, 16, 14, 12). |
| 12, 14, 16, 18 | 1Y1–1Y4 | Noninverting 3-state outputs for channel 1 (driven by 1A1–1A4 on pins 2, 4, 6, 8). |
| 10 | GND | Ground reference for all logic and output stages. |
| 20 | VCC | Positive supply rail (4.5–5.5 V); decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit buffers | Enables separate control of two memory banks or peripheral data paths without inter-channel coupling. |
| True 3-state outputs | High-impedance state (Z) fully isolates outputs from bus lines, preventing contention during multi-driver arbitration. |
| TTL-compatible input thresholds | Direct interface with legacy 74LS/74F logic without pull-ups, level shifters, or signal conditioning. |
| 64 mA output sink capability | Drives full TTL fan-out (10 units) while maintaining VOL ≤ 0.55 V under worst-case load and temperature. |
| SOIC-20 packaging | Reduces PCB area vs. DIP; supports reflow soldering and automated optical inspection (AOI) in volume production. |
Applications
| Memory Address Buffering | Parallel Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple SRAM or EPROM chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes address propagation and prevents bus contention during memory access cycles. Use Value: Eliminates address skew across devices and ensures setup/hold timing compliance with memory access times ≤ 100 ns. |
Use Scenario: Isolating CPU data bus from peripheral I/O ports (e.g., UART, GPIO expanders) in an industrial PLC backplane. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling CPU read/write operations while blocking noise and leakage between subsystems. Use Value: Prevents signal corruption during hot-swap events and reduces EMI coupling between noisy and sensitive analog/digital domains. |
| Legacy System Upgrade | Industrial Control Logic |
|
Use Scenario: Replacing obsolete 74LS241 in aging test equipment requiring long-term component availability and RoHS compliance. IC Role / Device Role / Timing Role: Pin-compatible TTL buffer delivering identical logic function with improved drive strength and thermal margin. Use Value: Extends product lifecycle without PCB redesign; supports modern manufacturing processes and environmental requirements. |
Use Scenario: Interfacing FPGA I/O banks to 5 V sensor arrays or relay drivers in factory automation controllers. IC Role / Device Role / Timing Role: Level-translating buffer ensuring robust signal integrity between 3.3 V logic and 5 V peripherals. Use Value: Maintains noise immunity in electrically noisy environments while supporting fast edge rates up to 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS241N | Lower drive (24 mA IOL), slower propagation (15 ns), PDIP-only packaging, no RoHS option. | Compatible only in legacy through-hole designs; unsuitable for new SMT layouts or high-speed buses. | Select only for exact form-fit replacement in existing LS-based boards where speed and drive are not limiting. |
| SN74ACT241DW | CMOS input (VIH = 2 V min), higher noise immunity, 24 mA IOL, 5 V tolerant, same SOIC-20 footprint. | Better for mixed-voltage systems; requires checking input drive strength from upstream TTL sources. | Prefer when upgrading to lower power or higher noise margin; verify source logic can meet ACT input current specs. |
Compared with SN74F241DW, SN74LS241N trades speed and drive for broader legacy compatibility, while SN74ACT241DW offers CMOS advantages but reduced output strength-making SN74F241DW optimal for high-drive, TTL-native bus buffering where timing and fan-out are critical.
Availability
SN74F241DW is available at Aetrix Electronics and suitable for memory address buffering, parallel bus isolation, legacy system upgrades, and industrial control logic requiring stable component supply and long-term manufacturability.
Supply support for SN74F241DW 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74F241DW belongs to TI's 74F family of fast TTL logic devices, engineered for high-speed memory and bus interface applications where propagation delay and output drive are critical design constraints.
FAQ
What is the maximum output sink current specification for SN74F241DW?
The SN74F241DW guarantees a minimum low-level output current (IOL) of 64 mA per output at VO ≤ 0.55 V under recommended operating conditions (VCC = 4.5 V, TA = 0°C to 70°C). This rating enables direct drive of 10 standard TTL loads and supports robust termination on shared data or address buses without external buffering.
Does SN74F241DW support 3.3 V logic inputs?
No, SN74F241DW does not reliably accept 3.3 V logic inputs. Its input high threshold (VIH) is specified at 2.0 V minimum, but it requires TTL-compatible drive strength and noise margins. Driving SN74F241DW from 3.3 V CMOS sources may result in marginal noise immunity or undefined switching behavior unless the source meets TTL output specs (IOH ≥ –15 mA, VOL ≤ 0.5 V).
Is SN74F241DW pin-compatible with SN74LS241?
Yes, SN74F241DW is pin-compatible with SN74LS241 in SOIC-20 (DW) and PDIP-20 (N) packages. Both share identical pin assignments, logic function, and 3-state enable behavior. However, SN74F241DW offers faster propagation (≤6.2 ns vs. ≤15 ns), higher output drive (64 mA vs. 24 mA), and RoHS-compliant packaging.
What is the recommended decoupling for SN74F241DW?
A 0.1 µF ceramic capacitor placed as close as possible to the VCC (pin 20) and GND (pin 10) terminals is recommended for SN74F241DW. For systems with multiple devices or high-frequency switching, add a bulk 4.7 µF–10 µF tantalum or aluminum electrolytic capacitor near the power entry point to suppress low-frequency ripple and supply sag.
Can SN74F241DW operate at 4.0 V supply?
No, SN74F241DW is not characterized for operation at 4.0 V. Its recommended operating supply range is 4.5 V to 5.5 V. At 4.0 V, parameters such as VOH, VOL, propagation delay, and noise margins fall outside guaranteed specifications, risking timing violations or logic errors in production systems.
SN74F241DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- 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:
- 15mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74F241DW FAQ
1.How can I place an order for SN74F241DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F241DW 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 SN74F241DW reliable?
The price and inventory of SN74F241DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F241DW is usually 5 days.
3.What payment methods are accepted for SN74F241DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F241DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F241DW?
SN74F241DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F241DW 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 SN74F241DW?
For technical support, including SN74F241DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F241DW requirements.
6.How does Aetrix verify that SN74F241DW is sourced from the original manufacturer or authorized distributors?
All SN74F241DW 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 SN74F241DW meets industry standards.
7.What is the process for return or replacement of SN74F241DW?
All SN74F241DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74F241DW, 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 SN74F241DW part is unused and in its original packaging.
Return procedure for SN74F241DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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