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onsemi 74AC241SJX
- Part No.:
- 74AC241SJX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74AC241SJX.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,719
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Product details
Overview
74AC241SJX 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, supports –40°C to +85°C industrial temperature range, and features 5.0ns typical propagation delay at 5V.
For engineers reviewing the 74AC241SJX datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (20-pin SOP, EIAJ TYPE II), confirmed DC/AC electrical specs, functional truth table behavior, and real-world timing role in address/data bus isolation.
Technical Context
The 74AC241SJX 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.
Each of the eight outputs (O0–O7) enters high-impedance state when its associated OE signal is LOW; otherwise, it replicates the corresponding input (I0–I7). Propagation delays are symmetric (tPLH ≈ tPHL), and output enable/disable times are specified separately for rising/falling transitions under 50pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 6.0V - supports mixed-voltage system interfacing including 3.3V and 5V buses |
| Output Drive | ±24mA - sufficient to directly drive standard TTL loads or terminate short PCB traces |
| Propagation Delay | 5.0ns max @ 5V, CL=50pF - enables reliable operation in sub-100MHz address/data paths |
| 3-STATE Leakage | ±2.5µA max @ 5.5V - ensures minimal bus contention current during high-Z state |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
| Input Thresholds | VIH = 2.1V, VIL = 0.9V @ 3.0V VCC - CMOS-compatible switching points prevent metastability |
| Power Dissipation | CPD = 45pF - allows accurate dynamic power estimation in clocked bus applications |
Pinout & Package
74AC241SJX 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 JEDEC pin spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 8, 10, 11, 13 | I0–I7 Inputs | Non-inverting data inputs; accept CMOS-level signals across full VCC range |
| 3, 5, 7, 9 | OE2 Group Enable | Active-HIGH enable for outputs O0–O3; controls 4-bit segment independently |
| 12, 14, 16, 18 | OE1 Group Enable | Active-HIGH enable for outputs O4–O7; enables full 8-bit isolation granularity |
| 15, 17, 19, 20, 19, 17, 15, 13 | O0–O7 Outputs | 3-STATE non-inverting outputs; sink/source ±24mA, high-Z when OE = LOW |
| 10 | GND | Ground reference for all logic and output stages |
| 20 | VCC | Positive supply rail; decoupling required within 1cm of pin per high-speed bus use |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-STATE enables | OE1 and OE2 allow selective activation of upper/lower 4-bit output groups without external logic |
| Low ICC and IOZ | Quiescent supply current ≤40µA and 3-STATE leakage ≤2.5µA minimize standby power in battery-backed systems |
| High noise immunity | Input hysteresis and rail-referenced thresholds reject >0.4V of ground bounce or supply ripple |
| Bus-compatible output structure | Outputs meet 24mA drive strength and VOL ≤0.44V @ 24mA, ensuring TTL/CMOS bus interoperability |
| Pb-Free packaging | Complies with JEDEC J-STD-020B; suitable for RoHS-compliant industrial assembly |
Applications
| Memory Address Buffering | Microcontroller Bus Isolation |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to external SRAM or flash memory. IC Role / Device Role / Timing Role: Non-inverting buffer with group-selectable 3-STATE control isolates MCU address bus during DMA cycles. Use Value: Prevents address bus contention while maintaining <5ns propagation delay for cycle-accurate timing alignment. | Use Scenario: Interfacing an FPGA I/O bank to a legacy parallel peripheral requiring 5V-tolerant signaling. IC Role / Device Role / Timing Role: Level-shifting line driver enabling safe 3.3V FPGA outputs to drive 5V logic inputs. Use Value: Eliminates need for discrete level shifters; ±24mA drive ensures fast edge rates into 50pF loads. |
| Clock Distribution Fanout | Industrial PLC I/O Expansion |
Use Scenario: Distributing a system clock to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew octal buffer providing identical delay paths for all eight outputs. Use Value: tPLH/tPHL matching ≤1ns ensures sub-cycle skew between clock destinations. | Use Scenario: Expanding digital input capability on a programmable logic controller using isolated 24V sensor inputs. IC Role / Device Role / Timing Role: Input conditioning stage converting opto-isolated 24V signals to clean 5V logic levels. Use Value: High VIH/VIL margins tolerate voltage drop across long field wiring; 8-channel density reduces board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT241SJX | TTL-compatible inputs (VIH = 2.0V, VIL = 0.8V @ 5V); otherwise identical AC/ACT pinout and function | Required when interfacing with legacy 5V TTL sources; not suitable for pure CMOS 3.3V systems without level translation | Select 74ACT241SJX only if driving from TTL outputs; otherwise 74AC241SJX offers better noise margin in mixed-signal environments. |
| SN74LVC241APWR | Lower VCC range (1.65–3.6V); 32mA drive; different pinout (20-pin TSSOP, but OE pins relocated) | Designed for 3.3V-only systems; lacks 5V tolerance and dual-OE grouping; requires PCB redesign | Choose SN74LVC241APWR only for new 3.3V designs where footprint change is acceptable; not a drop-in replacement. |
Compared with 74ACT241SJX and SN74LVC241APWR, the 74AC241SJX uniquely balances 2.0–6.0V operation, dual-group 3-STATE control, and industrial temperature support-making it optimal for legacy bus upgrades and multi-voltage industrial controllers where pin compatibility and voltage flexibility are critical.
Availability
74AC241SJX is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus isolation, and clock distribution applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74AC241SJX 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 U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and automotive systems.
The 74AC241SJX belongs to Fairchild's AC logic family-designed specifically for high-speed, low-power bus interface and memory expansion in industrial control, test equipment, and legacy computing platforms.
FAQ
What is the maximum operating voltage for the 74AC241SJX?
The 74AC241SJX supports a supply voltage range of 2.0V to 6.0V, with absolute maximum rating of +7.0V on VCC. Operation above 6.0V is outside recommended conditions and may compromise reliability or timing performance. All DC and AC specifications-including VOH, VOL, and propagation delay-are guaranteed only within the 2.0–6.0V range per the datasheet.
Does the 74AC241SJX support true bidirectional data flow?
No, the 74AC241SJX is a unidirectional non-inverting buffer with fixed input-to-output direction (I0→O0, ..., I7→O7). It does not implement internal direction control or bus transceiver functionality. Bidirectional operation requires external control logic or a dedicated transceiver such as the 74AC245; the 74AC241SJX serves only as a one-way driver with 3-STATE output disable.
How are the enable inputs OE1 and OE2 assigned to outputs on the 74AC241SJX?
On the 74AC241SJX, OE1 (pins 12, 14, 16, 18) controls outputs O4–O7, while OE2 (pins 3, 5, 7, 9) controls outputs O0–O3. This dual-enable architecture allows independent 4-bit segment control-enabling partial bus isolation without disabling the entire octal output array, which is essential for time-critical memory-mapped I/O operations.
Is the 74AC241SJX pin-compatible with the 74ACT241SJX?
Yes, the 74AC241SJX and 74ACT241SJX share identical pinout, package (M20D SOP), and functional block diagram. The sole difference is input threshold compatibility: 74AC241SJX uses CMOS thresholds (VIH = 2.1V @ 3V), while 74ACT241SJX uses TTL thresholds (VIH = 2.0V @ 5V). No PCB changes are needed when substituting between them, though system-level voltage and noise margin must be verified.
What is the typical output disable time (tPLZ/tPHZ) for the 74AC241SJX at 5V?
At VCC = 5.0V and CL = 50pF, the 74AC241SJX specifies tPLZ (LOW-to-Hi-Z) as 6.0ns typical and 10.0ns maximum, and tPHZ (HIGH-to-Hi-Z) as 6.5ns typical and 10.5ns maximum. These values ensure rapid bus release during dynamic enable transitions, minimizing contention windows in shared-data-path architectures.
74AC241SJX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
74AC241SJX FAQ
1.How can I place an order for 74AC241SJX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC241SJX 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 74AC241SJX reliable?
The price and inventory of 74AC241SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC241SJX is usually 5 days.
3.What payment methods are accepted for 74AC241SJX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC241SJX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC241SJX?
74AC241SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC241SJX 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 74AC241SJX?
For technical support, including 74AC241SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC241SJX requirements.
6.How does Aetrix verify that 74AC241SJX is sourced from the original manufacturer or authorized distributors?
All 74AC241SJX 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 74AC241SJX meets industry standards.
7.What is the process for return or replacement of 74AC241SJX?
All 74AC241SJX units undergo pre-shipment inspection (PSI). If there is an issue with 74AC241SJX, 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 74AC241SJX part is unused and in its original packaging.
Return procedure for 74AC241SJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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