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Texas Instruments SN74ALS241C-IN
- Part No.:
- SN74ALS241C-IN
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ALS241C-IN.pdf
- Description:
- BUS DRIVER, ALS SERIES
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Inventory:3,000
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Product details
Overview
SN74ALS241C-IN from Texas Instruments is an octal 3-state noninverting buffer/driver IC designed for memory address bus driving and clock distribution 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 VCC = 4.5–5.5 V.
For engineers reviewing the SN74ALS241C-IN datasheet, SN74ALS241C-IN pinout, SN74ALS241C-IN application, or SN74ALS241C-IN equivalent, this page delivers verified electrical specs, package mapping, functional role in bus isolation, and validated alternatives for legacy system maintenance and industrial control upgrades.
Technical Context
This device implements two independent 4-bit noninverting buffer sections, each with dedicated OE control (1OE and 2OE), enabling selective channel enable/disable without propagation delay coupling between groups. Its ALS (Advanced Low-Power Schottky) logic family delivers improved fan-out over standard LS while maintaining TTL voltage thresholds.
Each output supports true 3-state operation with high-impedance disable states controlled by either OE input, and exhibits guaranteed VOL ≤ 0.4 V at IOL = 24 mA and VOH ≥ 2.4 V at IOH = −15 mA - critical for reliable bus contention management in shared-data-path architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL power rails and noise margin stability. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial and embedded control applications. |
| IOL (Max) | 24 mA - drives standard TTL loads directly without external pull-ups or current boosting. |
| VOH (Min) | 2.4 V at IOH = −15 mA - guarantees logic-high recognition across downstream TTL inputs under full load. |
| VOL (Max) | 0.4 V at IOL = 24 mA - ensures robust low-level signaling and noise immunity on shared buses. |
| tPLH / tPHL | 2 ns to 11 ns - enables high-speed address buffering in 10–20 MHz memory subsystems. |
| Input Structure | pnp-based - reduces DC input current to ≤ 0.1 mA, minimizing loading on preceding logic stages. |
Pinout & Package
SN74ALS241C-IN is supplied in a 20-pin plastic DIP (PDIP-N) package with 300-mil width, 2.54 mm pitch, and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | Output Enable (1OE, 2OE) | Active-low controls for respective 4-bit buffer groups; both must be low for output assertion. |
| 2–5, 11–14 | Data Inputs (1A1–1A4, 2A1–2A4) | Noninverting input terminals accepting TTL-level signals for each buffer channel. |
| 6–9, 15–18 | Data Outputs (1Y1–1Y4, 2Y1–2Y4) | 3-state buffered outputs with symmetrical drive strength and defined VOL/VOH limits. |
| 10 | GND | Power ground reference for all internal logic and output stages. |
| 20 | VCC | +5 V supply rail powering internal gates and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit channels | Enables separate control of two memory or peripheral address segments using discrete OE lines. |
| True 3-state outputs | Guaranteed high-impedance disable state prevents bus contention during multi-driver arbitration. |
| pnp input structure | Reduces input current draw to ≤ 100 µA, preserving drive capability of upstream LS/ALS logic. |
| TTL-compatible voltage thresholds | VIH = 2.0 V min and VIL = 0.8 V max ensure interoperability with legacy 74-series components. |
| ALS logic family performance | Combines LS speed with lower power: ICC = 15–26 mA (active), 17–30 mA (disabled). |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving 16-bit address bus between microprocessor and multiple memory banks in industrial PLC backplanes. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from parallel memory modules with independent chip-select gating. Use Value: Prevents signal degradation across long traces via 24-mA drive strength and maintains timing integrity with <11 ns propagation delay. | Use Scenario: Distributing synchronized clock signals to multiple counter/timer ICs in test equipment timing subsystems. IC Role / Device Role / Timing Role: Fan-out buffer replicating master clock to eight downstream devices while maintaining edge fidelity and skew control. Use Value: Delivers matched rise/fall times and sub-10 ns enable/disable transitions to preserve setup/hold margins. |
| Bus Transceiver Interface | Legacy System Upgrade |
Use Scenario: Bidirectional data path conditioning in ISA-bus compatible expansion cards where direction control is managed externally. IC Role / Device Role / Timing Role: Unidirectional buffer segment supporting half-duplex bus arbitration with OE-synchronized output release. Use Value: Eliminates bus contention risk via guaranteed high-Z disable state and 5.5-V tolerant disabled outputs. | Use Scenario: Replacing obsolete SN74LS241 in aging avionics display controllers requiring extended temperature margin and lower power. IC Role / Device Role / Timing Role: Pin-compatible drop-in upgrade delivering 30% lower ICC and improved VOL spec versus LS equivalents. Use Value: Maintains identical PCB layout while reducing thermal load and improving noise margin at bus termination points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS241AN | Faster propagation (6.2 ns max vs. 11 ns), higher IOL (64 mA), but increased ICC (35–90 mA) and tighter VIH/VIL thresholds. | Better suited for high-speed bus designs requiring <10 ns timing closure; less tolerant of marginal input noise. | Select when speed outweighs power budget constraints and board-level noise is well-controlled. |
| SN74ALS244N | Octal noninverting buffer with identical ALS family specs, but single OE control for all 8 outputs instead of dual OE. | Applicable where unified enable/disable suffices; not suitable for split-bus architectures requiring independent group control. | Choose only if system design uses global bus enable rather than per-channel arbitration. |
Compared with SN74AS241AN, SN74ALS241C-IN trades speed for lower power and broader noise margin; versus SN74ALS244N, it provides finer-grained bus segmentation control at the cost of additional OE routing.
Availability
SN74ALS241C-IN is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and legacy industrial controller upgrades requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74ALS241C-IN 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 U.S.-based semiconductor manufacturer specializing in analog, embedded processing, and logic solutions with broad industrial and automotive qualification.
The SN74ALS241C-IN belongs to TI's legacy 74ALS logic family, engineered for high-density, low-power bus interface applications in commercial-grade computing and control systems.
FAQ
What is the maximum output sink current specification for SN74ALS241C-IN?
The SN74ALS241C-IN is rated for a maximum low-level output current (IOL) of 24 mA per output, tested at VCC = 4.5 V and guaranteed across the full 0°C to 70°C operating range. This value reflects its ALS-family optimization for balanced speed and drive capability without requiring external current amplification in standard TTL bus environments.
Does SN74ALS241C-IN support true 3-state operation on all outputs?
Yes, SN74ALS241C-IN provides true 3-state outputs on all eight Y pins (1Y1–1Y4 and 2Y1–2Y4). When either 1OE or 2OE is high, the corresponding four outputs enter a high-impedance state with leakage current limited to ±20 µA, ensuring safe bus sharing and preventing contention in multi-driver configurations.
Is SN74ALS241C-IN pin-compatible with SN74LS241?
Yes, SN74ALS241C-IN is pin-compatible with SN74LS241 in the same PDIP-20 package, sharing identical pinout, function table, and mechanical footprint. However, SN74ALS241C-IN offers improved VOL (0.4 V vs. 0.5 V), lower ICC, and faster switching - making it a direct drop-in replacement for reliability and power-sensitive upgrades.
What package type does SN74ALS241C-IN use, and is it RoHS-compliant?
SN74ALS241C-IN uses a 20-pin plastic DIP (PDIP-N) package with 300-mil width and through-hole leads. Per TI's packaging documentation, the SN74ALS241CN variant is RoHS-compliant with NiPdAu lead finish, and SN74ALS241C-IN corresponds to this qualified production version.
Can SN74ALS241C-IN operate with a 3.3-V supply?
No, SN74ALS241C-IN is not specified for 3.3-V operation. Its recommended VCC range is strictly 4.5 V to 5.5 V, and absolute maximum rating is 7 V. Operation below 4.5 V risks undefined logic states, degraded noise margin, and failure to meet VOL/VOH specifications - it must be used in 5-V TTL systems only.
SN74ALS241C-IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ALS241C-IN FAQ
1.How can I place an order for SN74ALS241C-IN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS241C-IN 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 SN74ALS241C-IN reliable?
The price and inventory of SN74ALS241C-IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS241C-IN is usually 5 days.
3.What payment methods are accepted for SN74ALS241C-IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS241C-IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS241C-IN?
SN74ALS241C-IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS241C-IN 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 SN74ALS241C-IN?
For technical support, including SN74ALS241C-IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS241C-IN requirements.
6.How does Aetrix verify that SN74ALS241C-IN is sourced from the original manufacturer or authorized distributors?
All SN74ALS241C-IN 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 SN74ALS241C-IN meets industry standards.
7.What is the process for return or replacement of SN74ALS241C-IN?
All SN74ALS241C-IN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS241C-IN, 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 SN74ALS241C-IN part is unused and in its original packaging.
Return procedure for SN74ALS241C-IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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