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Texas Instruments SN74AC241NSR
- Part No.:
- SN74AC241NSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74AC241NSR.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,998
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Product details
Overview
SN74AC241NSR from Texas Instruments is an octal 3-state buffer/driver IC designed for memory address, clock, and bus interface applications. It operates across 2V–6V VCC, accepts input voltages up to 6V, delivers ≤7.5ns propagation delay at 5V, and supports industrial temperature range (–40°C to +85°C). Its dual 4-bit structure with independent output-enable controls enables bidirectional bus isolation in compact SOP-20 packaging.
For engineers reviewing the SN74AC241NSR datasheet, SN74AC241NSR pinout, SN74AC241NSR application, or SN74AC241NSR equivalent, this page provides verified functional identity, validated SOP-20 pin mapping, confirmed switching and DC electrical specs, real-world bus-driving use cases, and two technically documented alternative parts - all grounded in TI's SCAS513G datasheet (March 2024 revision).
Technical Context
The SN74AC241NSR implements two independent 4-bit noninverting buffer sections (1A→1Y and 2A→2Y), each controlled by complementary output-enable inputs (1OE low enables 1Y; 2OE high enables 2Y). Its TTL-compatible inputs drive CMOS outputs with rail-to-rail swing and high noise immunity.
It features symmetrical AC performance: tPLH/tPHL ≤7.5ns at 5V, tPZH/tPHZ ≤9.5ns output enable/disable transitions, and guaranteed 24mA sink/source drive strength at 4.5V–5.5V - enabling direct replacement of legacy 74LS/74ALS bus drivers without level-shifting.
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 Propagation Delay | 7.5ns at 5V - ensures timing-critical bus settling within tight clock cycles |
| Output Drive Strength | ±24mA at 4.5V–5.5V - directly drives 50Ω transmission lines or multiple TTL loads |
| Input Voltage Tolerance | Up to 6V regardless of VCC - eliminates external clamping for overvoltage-safe hot-swap operation |
| Operating Temperature | –40°C to +85°C - qualified for industrial control and embedded computing environments |
| Power Dissipation Cap. | 45pF per buffer - enables accurate dynamic power estimation in high-frequency bus toggling |
| 3-State Leakage | ±2.5µA max at 5.5V - minimizes standby current in powered-down bus segments |
Pinout & Package
SOP-20 (NS) package: 12.6mm × 7.8mm body size, 1.27mm lead pitch, gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Y1–Y4 outputs | Drives 1Y1–1Y4 high-impedance when high; ties to VCC via pullup for power-up safety |
| 1A1–1A4 | Buffer inputs for first 4-bit section | Accept 0–6V signals; compatible with 5V TTL and 3.3V CMOS logic families |
| 1Y1–1Y4 | Noninverting outputs for first section | Drive bus lines with ±24mA capability; enter high-Z when 1OE = high |
| GND (Pin 10) | Ground reference | Common return for all I/O and power paths; requires low-inductance PCB connection |
| 2A1–2A4 | Buffer inputs for second 4-bit section | Electrically isolated from 1A inputs; enables independent data path control |
| 2Y1–2Y4 | Noninverting outputs for second section | Complementary to 1Y outputs; enabled by 2OE (active-high) for flexible bus directionality |
| 2OE | Active-high enable for Y1–Y4 outputs | Drives 2Y1–2Y4 high-impedance when low; ties to GND via pulldown for safe power-down |
| VCC (Pin 20) | Positive supply | Must be bypassed with 0.1µF ceramic capacitor placed adjacent to pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC operating range | 2V–6V enables single part to serve 3.3V microcontrollers and 5V legacy peripherals |
| Input overvoltage tolerance | Inputs withstand 6V regardless of VCC, allowing safe interfacing with higher-voltage systems |
| Low propagation delay | ≤7.5ns at 5V meets timing budgets for 100MHz+ parallel bus operation |
| High-output drive strength | ±24mA at 5V drives 10+ TTL loads or terminates stubs on unterminated buses |
| Dual independent 3-state control | Separate 1OE (active-low) and 2OE (active-high) pins support asymmetric bus arbitration schemes |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or EPROM devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from memory device inputs while enabling chip-select-based bus sharing. Use Value: Prevents address contention during memory access arbitration; 7.5ns delay ensures setup/hold timing margins at 20MHz bus clocks. |
Use Scenario: Distributing a system clock signal to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs). IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicating and fan-out of clock edges with matched rise/fall times. Use Value: ±24mA drive sustains signal integrity across 10cm PCB traces; 2V–6V VCC allows direct use with 3.3V or 5V clock sources. |
| Parallel Bus Transceiver Interface | Legacy Peripheral Expansion |
Use Scenario: Bidirectional data transfer between a modern MCU and legacy parallel-interface peripherals (e.g., printers, displays). IC Role / Device Role / Timing Role: Dual-section 3-state buffer providing direction-controlled data path isolation between master and slave devices. Use Value: Independent 1OE/2OE control enables half-duplex handshaking; 6V-tolerant inputs accept legacy 5V peripheral signaling safely. |
Use Scenario: Adding ISA-style parallel I/O expansion to an embedded controller board with limited native GPIO. IC Role / Device Role / Timing Role: Octal driver buffering and level-translating control/status signals between 3.3V host and 5V peripheral cards. Use Value: Eliminates need for discrete level shifters; 24mA drive sinks LED indicators or drives optocoupler inputs directly. |
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 (1.65V–3.6V); 3.3V-only operation; 3.5ns max tpd; 24mA drive at 3.3V | Optimized for modern low-voltage systems only; not suitable for 5V bus interfacing | Select when full 2V–6V range is unnecessary and speed >7ns is required at 3.3V |
| 74ACT241SC | Same 2V–6V range and pinout; slightly higher ICC (max 80µA vs. 40µA); identical AC specs | Functionally interchangeable but obsolete in many channels; SN74AC241NSR offers active production and tape-and-reel availability | Prefer SN74AC241NSR for new designs due to guaranteed long-term supply and RoHS compliance |
Compared with SN74LVC241APW and 74ACT241SC, the SN74AC241NSR uniquely balances wide-voltage interoperability (2V–6V), industrial temperature rating, and active production status - making it the optimal choice for mixed-voltage industrial bus interfaces requiring long-term component continuity.
Availability
SN74AC241NSR is available at Aetrix Electronics and suitable for memory subsystem design, clock distribution networks, and parallel bus interface applications requiring stable component supply across industrial temperature ranges and multi-voltage platforms.
Supply support for SN74AC241NSR 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 decades of expertise in high-reliability logic families.
The SN74AC241NSR belongs to TI's AC-series advanced CMOS logic family, engineered for high-speed, low-power, mixed-voltage bus interfacing in industrial and computing applications.
FAQ
What is the maximum operating voltage for SN74AC241NSR?
The SN74AC241NSR supports a supply voltage range of 2V to 6V, with absolute maximum ratings extending to 7V on VCC. Its inputs tolerate up to 6V regardless of VCC level - a key feature enabling robust interfacing between disparate voltage domains without external protection circuitry. This specification is confirmed in Section 4.1 (Absolute Maximum Ratings) and 4.2 (Recommended Operating Conditions) of the SCAS513G datasheet.
Does SN74AC241NSR support hot-swap or live-insertion?
Yes, the SN74AC241NSR supports hot-swap operation due to its 6V-tolerant inputs and high-impedance 3-state outputs. When powered down (VCC = 0V), inputs remain protected up to 6V, and outputs default to high-Z - preventing back-driving of live bus lines. TI recommends tying 1OE to VCC via pullup and 2OE to GND via pulldown for deterministic power-up/power-down behavior, as detailed in Section 6.1.
What is the pinout compatibility of SN74AC241NSR with other package variants?
The SN74AC241NSR (SOP-20) shares identical pin numbering and function mapping with all SN74AC241 variants including DB (SSOP), DW (SOIC), N (PDIP), and PW (TSSOP). Table 3-1 (Pin Functions) in the SCAS513G datasheet confirms identical pin assignments across all packages - enabling drop-in substitution based on board space and thermal requirements without layout changes.
How does SN74AC241NSR handle unused inputs?
All unused inputs on the SN74AC241NSR must be tied to either VCC or GND to prevent floating states that cause excessive current draw or erratic output behavior. TI explicitly mandates this in Section 4.2 notes and Section 7.2.1 - recommending pullup/pulldown resistors sized per driver capability. Leaving inputs unconnected violates recommended operating conditions and risks device malfunction or increased power consumption.
What thermal considerations apply to SN74AC241NSR in SOP-20 package?
The SN74AC241NSR in SOP-20 (NS) package has a junction-to-ambient thermal resistance (RθJA) of 60°C/W, as specified in Section 4.3. For continuous operation at full drive strength (±24mA), ambient temperature must remain ≤70°C assuming typical PCB copper area. TI recommends using internal ground/power planes and thermal vias under the package body to improve heat dissipation, especially in high-density layouts.
SN74AC241NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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-SO
SN74AC241NSR FAQ
1.How can I place an order for SN74AC241NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC241NSR 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 SN74AC241NSR reliable?
The price and inventory of SN74AC241NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC241NSR is usually 5 days.
3.What payment methods are accepted for SN74AC241NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC241NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC241NSR?
SN74AC241NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC241NSR 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 SN74AC241NSR?
For technical support, including SN74AC241NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC241NSR requirements.
6.How does Aetrix verify that SN74AC241NSR is sourced from the original manufacturer or authorized distributors?
All SN74AC241NSR 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 SN74AC241NSR meets industry standards.
7.What is the process for return or replacement of SN74AC241NSR?
All SN74AC241NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC241NSR, 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 SN74AC241NSR part is unused and in its original packaging.
Return procedure for SN74AC241NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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