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onsemi 74ACT241SCX
- Part No.:
- 74ACT241SCX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT241SCX.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,171
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Product details
Overview
74ACT241SCX from Fairchild Semiconductor is an octal non-inverting buffer/line driver with dual 3-STATE outputs, TTL-compatible inputs, ±24mA drive capability, and operation over 4.5V–5.5V supply. It serves as a memory address driver or bus-oriented transmitter in industrial control backplanes and legacy computing interfaces.
For engineers reviewing the 74ACT241SCX datasheet, pinout, applications, or equivalent options, key selection criteria include TTL input compatibility, dual independent output-enable control (OE1/OE2), 3-STATE leakage <±2.5µA at VCC=5.5V, and propagation delay ≤10.0ns at CL=50pF.
Technical Context
The 74ACT241SCX implements two independent 4-bit groups (I0–I3/O0–O3 and I4–I7/O4–O7), each controlled by its own active-HIGH 3-STATE enable (OE1, OE2). Its ACT logic family ensures TTL-level input thresholds (VIH=2.0V, VIL=0.8V at VCC=4.5V–5.5V) while delivering CMOS-level noise immunity and rail-to-rail output swing.
It supports high-density PCB layout via SOIC-20 packaging and meets JEDEC MS-013 mechanical standards. The device operates across –40°C to +85°C and exhibits guaranteed tPLH/tPHL ≤10.0ns and tPZH/tPHZ ≤11.5ns under 5V/50pF conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT - TTL-compatible inputs, CMOS outputs, 4.5–5.5V operation |
| Output Drive | ±24mA per output - drives heavy capacitive loads or multiple TTL inputs |
| Propagation Delay | ≤10.0ns max (tPLH/tPHL @ 5V/50pF) - enables high-speed bus timing in legacy systems |
| 3-STATE Leakage | ±2.5µA max (IOZ @ VCC=5.5V) - minimizes bus contention current in tri-state buses |
| Input Thresholds | VIH=2.0V, VIL=0.8V @ VCC=5V - ensures robust interfacing with standard TTL logic |
| Operating Temp | –40°C to +85°C - qualified for industrial temperature environments |
| Supply Voltage | 4.5V to 5.5V - compatible with regulated 5V rails; excludes 3.3V operation |
Pinout & Package
74ACT241SCX is housed in a 20-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-013, 0.300" wide (Package Number M20B), with standard pin pitch of 0.050" and body width of 7.5mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 8, 10, 11, 13 | I0–I7 Inputs | Non-inverting data inputs; accept TTL-compatible logic levels |
| 3, 5, 7, 9 | OE2 Group Enable | Active-HIGH enable for outputs O4–O7; controls 4-bit segment independently |
| 12, 14, 16, 18 | OE1 Group Enable | Active-HIGH enable for outputs O0–O3; allows dual-bank bus isolation |
| 15, 17, 19, 20, 2, 4, 6, 8 | O0–O7 Outputs | 3-STATE non-inverting outputs; high-impedance when respective OE is LOW |
| 10 | GND | Ground reference for logic and power return path |
| 20 | VCC | Positive supply terminal (4.5–5.5V); decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-STATE enables | OE1 and OE2 allow segmented bus control - isolate upper/lower nibbles without external logic |
| TTL-compatible inputs | VIH=2.0V / VIL=0.8V at 5V - interoperates directly with 74LS, 74F, and microcontroller GPIOs |
| Low ICC and IOZ | Quiescent ICC ≤40µA and 3-STATE leakage ≤±2.5µA - reduces standby power in powered-down subsystems |
| High-output drive strength | ±24mA sink/source per output - drives 15+ TTL loads or 50pF+ trace capacitance reliably |
| Industrial temperature range | –40°C to +85°C operation - validated for use in programmable logic controllers and motor drives |
Applications
| Memory Address Buffering | Legacy Bus Transceiver |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple memory chips on a shared bus. IC Role / Device Role / Timing Role: Non-inverting octal buffer with dual 3-STATE control isolates address segments during DMA cycles. Use Value: Enables clean address latching with tPLH ≤10ns and eliminates bus contention via independent OE1/OE2 gating. |
Use Scenario: Bidirectional data routing between ISA-style peripheral cards and system controller. IC Role / Device Role / Timing Role: Line driver/receiver with TTL-compatible inputs buffers control signals (IOR#, IOW#) and address strobes. Use Value: ±24mA drive sustains signal integrity across 6-inch backplane traces; 3-STATE enables hot-swap-safe isolation. |
| Clock Distribution | Industrial I/O Expansion |
|
Use Scenario: Fan-out of a 5MHz system clock to multiple synchronous peripherals (ADCs, DACs, timers). IC Role / Device Role / Timing Role: Low-skew non-inverting buffer with matched tPLH/tPHL ensures deterministic edge alignment. Use Value: Propagation delay variation ≤1.5ns (max-min) maintains setup/hold margins across all eight outputs. |
Use Scenario: Interfacing PLC CPU modules with discrete I/O racks using parallel control buses. IC Role / Device Role / Timing Role: Level-shifting and load-driving buffer for 24V-tolerant optocoupler inputs and relay drivers. Use Value: High noise immunity (CMOS inputs) and 24mA sink capability directly drive LED indicators and small solenoids. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT241DWR | Same ACT logic family, identical pinout, SOIC-20 package; TI's version has tighter VOH/VOL specs (VOH=4.76V min @ 24mA) | Validated for automotive AEC-Q100 Grade 3; broader qualification testing than Fairchild's industrial-grade 74ACT241SCX | Preferred where extended reliability validation or TI's long-term supply commitment is required. |
| 74LCX241MTCX | Lower voltage: 2.0–3.6V operation only; LVTTL-compatible inputs (VIH=2.0V), not TTL; 24mA drive retained | Designed for mixed-voltage 3.3V systems; incompatible with 5V TTL sources without level translation | Select only for 3.3V-native designs; not drop-in for 5V TTL buses driven by 74ACT241SCX. |
Compared with SN74ACT241DWR and 74LCX241MTCX, the 74ACT241SCX uniquely combines native 5V TTL compatibility, industrial temperature rating, and dual independent OE control in a JEDEC-standard SOIC-20 package - making it optimal for legacy 5V backplane upgrades and repair replacements.
Availability
74ACT241SCX is available at Aetrix Electronics and suitable for memory address buffering, legacy bus transceivers, clock distribution networks, and industrial I/O expansion requiring stable component supply and long-lifecycle support.
Supply support for 74ACT241SCX 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 analog and discrete semiconductor manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.
The 74ACT241SCX belongs to Fairchild's ACT advanced CMOS logic family, engineered specifically for high-speed, low-power 5V TTL-interfaced systems requiring robust noise immunity and bus-driving capability.
FAQ
What is the operating voltage range for the 74ACT241SCX?
The 74ACT241SCX operates strictly within 4.5V to 5.5V. Unlike AC-series variants, it does not support 3.3V or 2.0V operation. This ensures TTL-compatible input thresholds (VIH=2.0V, VIL=0.8V) and full ±24mA output drive performance. Operating outside this range may cause undefined logic states or excessive ICC.
Does the 74ACT241SCX support independent control of its two output groups?
Yes - the 74ACT241SCX features two separate active-HIGH 3-STATE enables: OE1 controls outputs O0–O3 (pins 12, 14, 16, 18), and OE2 controls O4–O7 (pins 3, 5, 7, 9). This allows selective isolation of upper and lower nibbles on shared buses without additional logic, a key design advantage over single-enable octal buffers.
What is the maximum propagation delay of the 74ACT241SCX at 5V?
The 74ACT241SCX guarantees tPLH and tPHL ≤10.0ns, and tPZH/tPHZ ≤11.5ns, under recommended conditions (VCC=5.0V, TA=–40°C to +85°C, CL=50pF). These values are measured from input transition (30% to 70% of VCC) to output crossing 1.5V, ensuring timing predictability in synchronous 5V systems.
Can the 74ACT241SCX be used in place of the 74AC241SCX?
No - the 74ACT241SCX has TTL-compatible inputs (VIH=2.0V), while the 74AC241SCX uses CMOS-compatible inputs (VIH=3.15V at 4.5V). Swapping them risks logic misreads in systems with marginal high-level drive. Additionally, 74ACT241SCX is not rated for 3.3V operation, unlike some AC variants.
What package type does the 74ACT241SCX use, and is it RoHS-compliant?
The 74ACT241SCX uses a 20-lead SOIC package (JEDEC MS-013, 0.300" wide, Package Number M20B). Per the datasheet, it is offered in Pb-Free packaging compliant with JEDEC J-STD-020B, meeting RoHS Directive 2011/65/EU requirements for lead-free soldering processes.
74ACT241SCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74ACT241SCX FAQ
1.How can I place an order for 74ACT241SCX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT241SCX 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 74ACT241SCX reliable?
The price and inventory of 74ACT241SCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT241SCX is usually 5 days.
3.What payment methods are accepted for 74ACT241SCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT241SCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT241SCX?
74ACT241SCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT241SCX 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 74ACT241SCX?
For technical support, including 74ACT241SCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT241SCX requirements.
6.How does Aetrix verify that 74ACT241SCX is sourced from the original manufacturer or authorized distributors?
All 74ACT241SCX 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 74ACT241SCX meets industry standards.
7.What is the process for return or replacement of 74ACT241SCX?
All 74ACT241SCX units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT241SCX, 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 74ACT241SCX part is unused and in its original packaging.
Return procedure for 74ACT241SCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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