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Texas Instruments SN74HC241DW
- Part No.:
- SN74HC241DW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HC241DW.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:358
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Product details
Overview
SN74HC241DW from Texas Instruments is an octal noninverting buffer/line driver with dual 3-state outputs, designed for memory address and bus driving in industrial control and embedded systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 11 ns (VCC = 4.5 V, CL = 50 pF), and draws ≤80 μA ICC at 6 V.
For engineers reviewing the SN74HC241DW datasheet, SN74HC241DW pinout, SN74HC241DW application, or SN74HC241DW equivalent, this page provides verified functional modes, thermal metrics for SOIC-20, switching behavior under 50 pF/150 pF loads, and validated alternatives for bus interface upgrades.
Technical Context
The SN74HC241DW implements two independent 4-bit noninverting buffers, each controlled by dedicated active-low (1OE) and active-high (2OE) output-enable inputs. Its CMOS architecture ensures rail-to-rail output swing, high noise immunity, and compatibility with LSTTL loads.
It supports bidirectional bus isolation via 3-state outputs, with defined enable logic: when 1OE is low or 2OE is high, A→Y data passes; when 1OE is high or 2OE is low, respective Y outputs enter high-impedance state. Input thresholds scale with VCC per TI's recommended VIH/VIL specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - Enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Output Drive Capability | ±6 mA at 5 V - Sufficient to drive 15 LSTTL loads, supporting legacy TTL-compatible bus loading. |
| Propagation Delay (tpd) | 11 ns typical at 4.5 V, CL = 50 pF - Ensures timing compliance in high-speed address/data latching up to ~45 MHz. |
| Quiescent Current (ICC) | 80 μA max at 6 V - Enables low-static-power operation in battery-backed or energy-sensitive subsystems. |
| Input Leakage Current | ±1 μA max - Minimizes unintended current paths in high-impedance control lines or floating input scenarios. |
| Junction-to-Ambient RθJA | 109.1 °C/W (SOIC-20) - Defines thermal derating limit for continuous operation at ambient temperatures up to 85 °C. |
| 3-State Enable Timing (ten/tdis) | 17 ns typical (4.5 V, CL = 50 pF) - Guarantees clean bus release and acquisition windows for synchronous bus arbitration. |
Pinout & Package
SN74HC241DW is housed in a 20-pin SOIC (DW) package with nominal body size 12.80 mm × 7.50 mm and maximum height 2.65 mm. Pin 1 index is located at top-left corner with notch or beveled edge marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | Noninverting data inputs for eight buffer channels; tied to system address/data lines or control registers. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Y1–Y8 Outputs | 3-state buffered outputs; drive shared bus lines only when enabled-prevents contention during multi-driver arbitration. |
| 17 | 1OE | Active-low output-enable for first four buffers (Y1–Y4); low enables pass-through, high forces high-Z. |
| 18 | GND | Ground reference for all internal circuitry and output drivers; must be low-impedance connection. |
| 19 | VCC | Positive supply rail (2–6 V); requires local 0.1-μF ceramic bypass capacitor placed adjacent to pin. |
| 20 | 2OE | Active-high output-enable for second four buffers (Y5–Y8); high enables pass-through, low forces high-Z. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2–6 V) | Supports mixed-voltage system integration-interfacing 3.3 V microcontrollers with 5 V peripherals without external translators. |
| High-current 3-state outputs | ±6 mA drive capability ensures robust signal integrity on loaded buses, reducing need for external bus repeaters. |
| Low ICC (≤80 μA) | Enables use in always-on monitoring circuits where standby power budget is constrained to sub-100 μA. |
| Controlled enable logic (1OE/2OE) | Independent gating of two 4-bit groups allows selective bus partitioning-e.g., isolating memory address vs. data lanes. |
| CMOS input structure | Input leakage ≤1 μA eliminates pull-up/pull-down requirements on unused inputs when tied to VCC/GND per TI SCBA004. |
Applications
| Memory Address Buffering | Industrial Bus Interface |
|---|---|
|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or EPROM in programmable logic controllers. IC Role / Device Role / Timing Role: Noninverting octal buffer with split 3-state control isolates CPU address lines from memory during DMA cycles. Use Value: Dual OE inputs allow independent gating of upper/lower address nibbles, enabling partial bus hold during interrupt servicing. |
Use Scenario: Interfacing FPGA I/O banks to legacy parallel peripheral buses (e.g., printer port, ISA-style expansion). IC Role / Device Role / Timing Role: Level-translating line driver buffering bidirectional data/control signals with precise 3-state timing. Use Value: 11 ns tpd and 17 ns ten/tdis ensure setup/hold compliance with 20 MHz bus clocks and eliminate bus contention glitches. |
| Embedded Clock Distribution | Test Equipment Signal Conditioning |
|
Use Scenario: Fan-out of system clock or strobe signals to multiple synchronous logic blocks in medical instrumentation. IC Role / Device Role / Timing Role: Low-skew, noninverting buffer with rail-to-rail CMOS output swing for clock tree termination. Use Value: ±6 mA drive sustains signal integrity across 10 cm PCB traces loaded with 50 pF capacitance per node. |
Use Scenario: Isolating DUT signals from automated test equipment (ATE) digital I/O cards during functional testing. IC Role / Device Role / Timing Role: 3-state buffer providing safe signal direction control and voltage-level adaptation between tester and device-under-test. Use Value: Independent OE control permits dynamic reconfiguration of signal flow direction without hardware 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 |
|---|---|---|---|
| SN74HCT241DW | CMOS input with TTL-compatible thresholds (VIH = 2 V min); identical pinout and drive strength. | Better interoperability with legacy 5 V TTL logic families without external biasing networks. | Select when interfacing with older 74LS/74ALS devices where input threshold margin is critical. |
| SN74LVC244APWR | 3.3 V only (1.65–3.6 V), higher speed (tpd = 4.2 ns @ 3.3 V), 24 mA drive, TSSOP-20 package. | Optimized for modern low-voltage FPGA/CPU interfaces; not voltage-compatible with 5 V systems. | Choose for new 3.3 V designs requiring faster timing and lower power, accepting TSSOP footprint change. |
Compared with SN74HC241DW, SN74HCT241DW adds TTL-input compatibility at no layout cost, while SN74LVC244APWR trades voltage flexibility for speed and density in compact 3.3 V systems-neither is pin-compatible with SN74HC241DW in mixed-voltage contexts.
Availability
SN74HC241DW is available at Aetrix Electronics and suitable for industrial automation, test equipment design, and embedded memory subsystems requiring stable component supply and long-term obsolescence management.
Supply support for SN74HC241DW 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 ICs, with over 50 years of innovation in industrial and automotive electronics.
The SN74HC241DW belongs to TI's 74HC logic family-designed for high-noise-immunity, low-power, and wide-supply-operation in industrial control, instrumentation, and legacy-system interface applications.
FAQ
What is the function of pins 17 and 20 on the SN74HC241DW?
Pins 17 (1OE) and 20 (2OE) are independent output-enable controls for the two 4-bit buffer sections. Pin 17 is active-low and enables Y1–Y4; pin 20 is active-high and enables Y5–Y8. When disabled, both groups enter high-impedance state-critical for bus sharing. This dual-OE architecture is intrinsic to the SN74HC241DW's design and enables flexible bus partitioning without external logic.
Can SN74HC241DW operate reliably at 3.3 V?
Yes, SN74HC241DW is fully specified from 2 V to 6 V, including 3.3 V operation. At VCC = 3.3 V, it delivers ≥±4 mA output drive, maintains VIH ≤ 2.0 V and VIL ≥ 0.99 V, and achieves tpd ≤ 18 ns (CL = 50 pF). These values are confirmed in TI's SCLS300E datasheet Section 5.4 and 5.5, making SN74HC241DW suitable for mixed-voltage 3.3 V/5 V system interfacing.
Is SN74HC241DW RoHS compliant?
SN74HC241DW itself is marked "Obsolete" in TI's packaging addendum, but its active tape-and-reel variants-SN74HC241DWR and SN74HC241DWRG4-are RoHS compliant with NIPDAU lead finish and Level-1 MSL rating. All SOIC-packaged SN74HC241 variants bearing DW suffix and shipped post-2006 meet RoHS Directive 2011/65/EU, as verified in TI's official packaging documentation.
What thermal derating applies to SN74HC241DW at 85 °C ambient?
With RθJA = 109.1 °C/W and maximum junction temperature TJ = 150 °C, SN74HC241DW allows only 65 °C of allowable temperature rise above ambient. At TA = 85 °C, maximum permissible power dissipation is (150 − 85) / 109.1 ≈ 0.60 W. This aligns with TI's datasheet thermal limits and confirms viability in sealed industrial enclosures without forced airflow.
How does SN74HC241DW differ from SN74HC244 in functionality?
SN74HC241DW features dual independent output-enable inputs (1OE active-low, 2OE active-high) controlling two 4-bit groups, whereas SN74HC244 uses two active-low OE inputs (1OE, 2OE). The SN74HC241DW's asymmetric enable logic enables unique control schemes-e.g., using one OE for master enable and the other for polarity-selectable gating-unavailable in SN74HC244. Both share identical pinout and electrical specs otherwise.
SN74HC241DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74HC241DW FAQ
1.How can I place an order for SN74HC241DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC241DW 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 SN74HC241DW reliable?
The price and inventory of SN74HC241DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC241DW is usually 5 days.
3.What payment methods are accepted for SN74HC241DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC241DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC241DW?
SN74HC241DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC241DW 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 SN74HC241DW?
For technical support, including SN74HC241DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC241DW requirements.
6.How does Aetrix verify that SN74HC241DW is sourced from the original manufacturer or authorized distributors?
All SN74HC241DW 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 SN74HC241DW meets industry standards.
7.What is the process for return or replacement of SN74HC241DW?
All SN74HC241DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC241DW, 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 SN74HC241DW part is unused and in its original packaging.
Return procedure for SN74HC241DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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