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onsemi 74AC241SJ
- Part No.:
- 74AC241SJ
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74AC241SJ.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
74AC241SJ from Fairchild Semiconductor is an octal non-inverting buffer/line driver with dual 3-STATE outputs, designed for memory address driving and bus-oriented transmission. It operates from 2.0V to 6.0V, delivers ±24mA output drive, features 5.0ns typical propagation delay at 5V, and supports –40°C to +85°C industrial temperature range.
For engineers reviewing the 74AC241SJ datasheet, pinout, applications, or equivalent options, this device is selected for high-density PCB bus interfacing where low ICC (40µA max), low IOZ (±2.5µA), and TTL-compatible timing margins are critical in memory and clock distribution systems.
Technical Context
The 74AC241SJ implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-HIGH 3-STATE enable input (OE1, OE2). Its AC logic family ensures CMOS-level input thresholds and rail-to-rail output swing across 2.0–6.0V VCC.
Propagation delays (tPLH/tPHL) are specified down to 5.0ns (typ) at 5V/50pF load; output enable/disable times (tPZH/tPHZ) are tightly controlled to ≤10.0ns (max) - enabling precise bus arbitration and glitch-free state transitions in synchronous memory interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 6.0V - supports mixed-voltage system interfacing (e.g., 3.3V logic driving 5V bus) |
| Output Drive | ±24mA - sufficient to directly drive standard TTL loads or terminate short PCB traces without external buffers |
| tPLH / tPHL | 5.0ns (typ) at VCC = 5.0V, CL = 50pF - enables >100MHz bus toggle rates in point-to-point configurations |
| ICC (Quiescent) | 40µA max at VCC = 5.5V - minimizes standby power in battery-backed or energy-sensitive control modules |
| IOZ (3-STATE Leakage) | ±2.5µA max - ensures reliable high-impedance isolation when multiple drivers share a common bus |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded controllers and automotive body electronics |
| Input Thresholds | VIH = 2.1V, VIL = 0.9V at VCC = 3.0V - provides 0.6V noise margin against ground bounce in noisy environments |
Pinout & Package
74AC241SJ is housed in a 20-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide (Package Number M20D), with gull-wing leads and standard 0.025" pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 10, 12, 14, 16 | I0–I7 Inputs | Non-inverting data inputs; CMOS-compatible thresholds scale with VCC |
| 3, 5, 7, 9 | OE2 Group Enable | Active-HIGH enable controlling outputs O0–O3; must be driven to GND or VCC - no floating allowed |
| 11, 13, 15, 17 | O0–O3 Outputs | 3-STATE buffered outputs; high-impedance when OE2 = LOW |
| 12, 14, 16, 18 | OE1 Group Enable | Active-HIGH enable controlling outputs O4–O7; independent of OE2 for split-bus control |
| 19, 20 | O4–O7 Outputs | 3-STATE buffered outputs; isolated from O0–O3 group via separate OE control |
| 8 | GND | Ground reference for all logic and output stages; requires low-inductance connection to PCB plane |
| 10 | VCC | Positive supply (2.0–6.0V); decoupling capacitor (0.1µF ceramic) required within 5mm |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit 3-STATE groups | OE1 and OE2 allow simultaneous or staggered bus release - essential for multi-master arbitration in legacy parallel buses |
| Low ICC and IOZ (50% reduction vs. prior gen) | Reduces system-level quiescent current and leakage-induced bus contention errors in hot-swap or power-gated subsystems |
| ±24mA output sink/source capability | Eliminates need for external line drivers when interfacing to 50Ω terminated lines or multiple TTL inputs (fan-out ≥10) |
| 5.0ns typical propagation delay at 5V | Supports setup/hold timing closure in 20MHz+ address/data latching circuits without added delay compensation |
| Pb-Free JEDEC-compliant package | M20D SOP meets RoHS Directive 2011/65/EU and J-STD-020B reflow profile - compatible with lead-free SMT assembly |
Applications
| Memory Address Buffering | Parallel Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or EPROM in space-constrained industrial controller. IC Role / Device Role / Timing Role: Non-inverting octal buffer with split-enable control isolates CPU address lines from memory bus loading and prevents backdrive during reset. Use Value: Dual OE pins allow sequential address strobing (e.g., lower byte first), reducing bus contention and enabling deterministic timing alignment. |
Use Scenario: Bidirectional data path conditioning between FPGA and legacy ISA-style peripheral card. IC Role / Device Role / Timing Role: Bus-oriented transmitter/receiver providing level translation and drive strength matching between mismatched logic families. Use Value: ±24mA drive and 5ns delay ensure clean signal edges across 10cm PCB traces, meeting setup/hold windows for 8MHz ISA cycles. |
| Clock Distribution Fan-Out | Industrial I/O Expansion Module |
|
Use Scenario: Distributing a 25MHz system clock to four downstream ASICs with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew non-inverting buffer minimizing inter-channel skew (<1ns) while maintaining signal integrity on shared clock net. Use Value: Tight tPLH/tPHL matching (±0.5ns typ) and low CIN (4.5pF) prevent duty-cycle distortion and jitter accumulation across fan-out branches. |
Use Scenario: Isolating PLC CPU I/O lines from field-side relay and sensor interface cards subject to EMI and voltage transients. IC Role / Device Role / Timing Role: 3-STATE-enabled buffer acting as programmable direction gate and transient-suppressed signal conditioner. Use Value: High-impedance disable mode (IOZ ≤ ±2.5µA) prevents backfeed into CPU during module hot-swap or fault isolation sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT241SJ | TTL-compatible inputs (VIH = 2.0V, VIL = 0.8V at 5V); identical AC specs and pinout | Better interoperability with legacy 74LS/74F systems; higher input drive requirement | Select when interfacing with older TTL logic families requiring guaranteed VIH/VIL margins |
| SN74AC241N | DIP-20 package (not surface-mount); same electrical specs but incompatible footprint and thermal profile | Suitable only for prototyping or through-hole production; lacks M20D's 5.3mm width and gull-wing reliability | Choose only for breadboard validation or legacy DIP-based repair; not for new SMT designs |
Compared with 74ACT241SJ and SN74AC241N, the 74AC241SJ offers optimal balance of modern SMT compatibility, low-power CMOS inputs, and industrial temperature support - making it preferred for new board designs targeting density, efficiency, and long-term supply stability.
Availability
74AC241SJ is available at Aetrix Electronics and suitable for memory address buffering, parallel bus interfacing, clock distribution, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AC241SJ 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
Fairchild Semiconductor was a leading designer of high-performance analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed and supported.
The 74AC241SJ belongs to Fairchild's AC logic family - engineered for high-speed, low-power, pin-compatible upgrades to 74LS/74F series in industrial control, instrumentation, and computing infrastructure.
FAQ
What is the maximum operating voltage for the 74AC241SJ?
The 74AC241SJ supports a supply voltage range of 2.0V to 6.0V, with absolute maximum rating of +7.0V. Operation above 6.0V violates recommended conditions and risks parametric shift or accelerated wear-out; sustained use at 6.0V is validated across –40°C to +85°C.
Does the 74AC241SJ support true bidirectional data flow?
No - the 74AC241SJ is a unidirectional non-inverting buffer with fixed input-to-output mapping (I0→O0, etc.). Bidirectional operation requires external control logic and separate enable signals; it does not implement auto-direction sensing or internal bus transceivers like 74AC245.
Can both OE1 and OE2 be tied together on the 74AC241SJ?
Yes - OE1 and OE2 may be connected to a single enable signal if unified 8-bit 3-STATE control is required. Doing so eliminates independent group control but simplifies routing and reduces GPIO usage; ensure the combined enable net has adequate drive strength for both inputs' capacitance.
What is the input capacitance of the 74AC241SJ?
The 74AC241SJ has a typical input capacitance (CIN) of 4.5pF per pin, measured with VCC open. This low value minimizes loading on upstream drivers and preserves edge rate integrity in high-frequency address or clock paths.
Is the 74AC241SJ RoHS compliant and lead-free?
Yes - the 74AC241SJ is manufactured in a Pb-Free package per JEDEC J-STD-020B and complies with EU RoHS Directive 2011/65/EU. The M20D SOP package uses matte tin terminations and is qualified for standard lead-free reflow profiles (peak 260°C).
74AC241SJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOP
74AC241SJ FAQ
1.How can I place an order for 74AC241SJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC241SJ 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 74AC241SJ reliable?
The price and inventory of 74AC241SJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC241SJ is usually 5 days.
3.What payment methods are accepted for 74AC241SJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC241SJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC241SJ?
74AC241SJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC241SJ 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 74AC241SJ?
For technical support, including 74AC241SJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC241SJ requirements.
6.How does Aetrix verify that 74AC241SJ is sourced from the original manufacturer or authorized distributors?
All 74AC241SJ 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 74AC241SJ meets industry standards.
7.What is the process for return or replacement of 74AC241SJ?
All 74AC241SJ units undergo pre-shipment inspection (PSI). If there is an issue with 74AC241SJ, 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 74AC241SJ part is unused and in its original packaging.
Return procedure for 74AC241SJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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