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Texas Instruments SN74ALS241CN
- Part No.:
- SN74ALS241CN
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ALS241CN.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:474
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Product details
Overview
SN74ALS241CN from Texas Instruments is an octal 3-state noninverting buffer/driver IC designed for memory address and bus line driving in TTL-compatible systems. It features dual independent 4-bit channels, symmetrical active-low output-enable (OE) inputs, pnp input structure for reduced DC loading, and operates across 0°C to 70°C with 4.5 V–5.5 V supply. It drives high-fan-out loads in legacy industrial control and data acquisition backplanes.
For engineers reviewing the SN74ALS241CN datasheet, SN74ALS241CN pinout, SN74ALS241CN application, or SN74ALS241CN equivalent, key selection considerations include its 48 mA low-level output drive capability (−1 version), 3-state timing performance (tPLH/tPHL ≤ 11 ns), dual OE control architecture, and PDIP-20 package compatibility with through-hole legacy PCBs.
Technical Context
This device implements two independent 4-bit noninverting buffer sections, each with dedicated active-low output-enable (1OE and 2OE) controlling four 3-state outputs. Its pnp input stage minimizes input current draw, enabling higher fan-in in dense logic systems.
Propagation delays are specified under 50 pF load and 500 Ω termination: tPLH/tPHL ≤ 11 ns (max), while enable/disable times (tPZH/tPLZ) range from 3 ns to 21 ns depending on OE input and output state transitions. The −1 version supports 48 mA IOL at VCC = 4.75–5.25 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation within standard TTL power rail tolerances. |
| Operating Temperature | 0°C to 70°C - Qualified for commercial-grade embedded and industrial control environments. |
| Low-Level Output Current | 48 mA (−1 version) - Supports direct driving of multiple TTL inputs or resistive bus terminations without external buffers. |
| Propagation Delay | ≤11 ns (tPLH/tPHL, max) - Enables reliable operation in 20+ MHz address/data bus timing budgets. |
| 3-State Enable Time | tPZH ≤ 10 ns, tPLZ ≤ 15 ns - Minimizes bus contention windows during output state transitions. |
| Input Voltage Thresholds | VIH = 2.0 V, VIL = 0.8 V - Matches standard TTL logic levels for seamless interface with 74LS/74ALS families. |
| Output Voltage Levels | VOH ≥ 2.4 V (IOH = −12 mA), VOL ≤ 0.4 V (IOL = 24 mA) - Guarantees noise margins >0.4 V in mixed-logic systems. |
Pinout & Package
SN74ALS241CN uses a 20-pin plastic dual in-line package (PDIP-N), 300-mil width, with standard through-hole footprint and 2.54 mm pitch. Pin 1 is marked by a notch or beveled corner at the top-left edge when viewed from top with pin 1 upper-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable controls for Channel 1 and Channel 2; both must be low for corresponding Y outputs to drive. |
| 2, 4, 6, 8 | 1A1–1A4 | Noninverting input signals for Channel 1 outputs (1Y1–1Y4). |
| 3, 5, 7, 9 | 2Y4–2Y1 | Inverted-order 3-state outputs from Channel 2 (2Y1–2Y4 correspond to pins 9, 7, 5, 3). |
| 11, 13, 15, 17 | 1Y1–1Y4 | Noninverting 3-state outputs for Channel 1 (1Y1 = pin 11, 1Y2 = pin 13, etc.). |
| 12, 14, 16, 18 | 2A4–2A1 | Noninverting inputs for Channel 2 (2A1 = pin 18, 2A2 = pin 16, etc.). |
| 10 | GND | Ground reference for all internal circuitry and output drivers. |
| 20 | VCC | +5 V supply connection; decoupling capacitor required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit channels | Enables separate control of two memory banks or peripheral buses using discrete OE signals. |
| pnp input structure | Reduces input current to ≤0.1 mA, lowering system power and allowing higher fan-in without signal degradation. |
| 3-state bus interface | Prevents bus contention in shared-data-path architectures via high-impedance output disable. |
| −1 version 48 mA IOL rating | Drives up to 20 standard TTL loads directly, eliminating need for external driver stages in high-current bus designs. |
| TTL-compatible voltage thresholds | Ensures interoperability with legacy 74LS, 74ALS, and 74AS logic without level-shifting components. |
Applications
| Memory Address Buffering | Parallel Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple memory chips in a legacy industrial controller. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address bus from memory modules; dual OE allows bank-select timing control. Use Value: Eliminates address skew with ≤11 ns propagation delay and supports simultaneous enable of 8 outputs per channel. |
Use Scenario: Bidirectional data bus isolation between an FPGA and legacy parallel peripherals (e.g., ADCs, DACs, LCD controllers). IC Role / Device Role / Timing Role: Unidirectional buffer section used in each direction; OE signals synchronized to read/write strobes to prevent bus conflicts. Use Value: 48 mA drive strength ensures robust signal integrity across 15 cm PCB traces loaded with multiple CMOS inputs. |
| Industrial Backplane Driver | Legacy Test Equipment Signal Conditioning |
|
Use Scenario: Level-shifting and fan-out expansion for control signals routed across a 20-slot Eurocard backplane. IC Role / Device Role / Timing Role: Octal buffer providing impedance matching and noise immunity on long parallel control lines. Use Value: pnp inputs reduce cumulative loading on upstream logic; 3-state capability enables hot-swap-safe slot enable/disable. |
Use Scenario: Interfacing modern microcontroller I/O to vintage test instrumentation requiring TTL-level strobes and handshaking signals. IC Role / Device Role / Timing Role: Signal repeater and current booster for timing-critical handshake lines (e.g., BUSY, ACK, STB). Use Value: Sub-15 ns enable/disable times meet tight setup/hold requirements of IEEE-488–compatible instruments. |
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 |
|---|---|---|---|
| SN74ALS244N | Octal noninverting buffer with identical pinout and electrical specs, but single OE input (not dual OE). | Suitable where unified enable control suffices; not appropriate for independent channel gating. | Select SN74ALS244N only if board layout lacks routing space for second OE signal or firmware does not require per-channel control. |
| SN74AS241N | Faster propagation delay (≤6.2 ns), higher ICC (up to 90 mA), and improved VOL (0.31 V @ 64 mA), but same pinout and function. | Better suited for high-speed bus applications above 25 MHz; increased power dissipation requires thermal review. | Choose SN74AS241N when timing margin is critical and power budget allows; verify thermal derating in enclosed enclosures. |
Compared with SN74ALS241CN, SN74ALS244N simplifies control logic at the cost of channel independence, while SN74AS241N delivers measurable speed and drive improvements but demands stricter thermal management and higher supply current.
Availability
SN74ALS241CN is available at Aetrix Electronics and suitable for industrial control systems, legacy test equipment upgrades, and military-grade commercial retrofits requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74ALS241CN 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 SN74ALS241CN belongs to TI's 74ALS TTL logic family, engineered for high-speed, low-power, and high-fan-out operation in memory and bus interface applications where compatibility with legacy 5 V systems is essential.
FAQ
What is the maximum output sink current supported by SN74ALS241CN?
The SN74ALS241CN −1 version supports up to 48 mA low-level output current (IOL) when VCC is maintained between 4.75 V and 5.25 V. This rating is confirmed in the "Recommended Operating Conditions" table of the SDAS153E datasheet and enables direct drive of multiple TTL inputs or terminated bus lines without external amplification. Standard versions specify 24 mA IOL.
Does SN74ALS241CN support dual independent output-enable control?
Yes, SN74ALS241CN features two separate active-low output-enable inputs: 1OE (pin 1) controls outputs 1Y1–1Y4, and 2OE (pin 19) controls outputs 2Y1–2Y4. This allows independent gating of two 4-bit data paths - for example, enabling one memory bank while disabling another - without requiring external logic or multiplexing.
Is SN74ALS241CN compatible with 74LS logic voltage levels?
Yes, SN74ALS241CN is fully compatible with 74LS TTL interfaces: its VIH (2.0 V min) and VIL (0.8 V max) match LS thresholds, and VOH (≥2.4 V @ −12 mA) and VOL (≤0.4 V @ 24 mA) provide adequate noise margins. The pnp input structure also ensures low input current, preventing loading issues common when interfacing LS outputs to ALS inputs.
What package type is used for SN74ALS241CN?
SN74ALS241CN uses a 20-pin plastic dual in-line package (PDIP-N) with 300-mil body width and 2.54 mm lead pitch. It is supplied in tube packaging (20 units per tube) and features NIPDAU lead finish with RoHS compliance. This through-hole package supports legacy assembly processes and prototyping on breadboards or perfboards.
Can SN74ALS241CN be used in place of SN74ALS244N?
SN74ALS241CN and SN74ALS244N share identical pinouts and core functionality but differ in output-enable architecture: SN74ALS241CN has dual OE inputs (1OE and 2OE), while SN74ALS244N uses a single OE. Replacement is possible only if the design routes both OE signals and firmware logic accommodates independent channel control - otherwise, signal contention or unintended output states may occur.
SN74ALS241CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ALS241CN FAQ
1.How can I place an order for SN74ALS241CN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS241CN 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 SN74ALS241CN reliable?
The price and inventory of SN74ALS241CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS241CN is usually 5 days.
3.What payment methods are accepted for SN74ALS241CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS241CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS241CN?
SN74ALS241CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS241CN 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 SN74ALS241CN?
For technical support, including SN74ALS241CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS241CN requirements.
6.How does Aetrix verify that SN74ALS241CN is sourced from the original manufacturer or authorized distributors?
All SN74ALS241CN 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 SN74ALS241CN meets industry standards.
7.What is the process for return or replacement of SN74ALS241CN?
All SN74ALS241CN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS241CN, 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 SN74ALS241CN part is unused and in its original packaging.
Return procedure for SN74ALS241CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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