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onsemi 74AC241SCX
- Part No.:
- 74AC241SCX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74AC241SCX.pdf
- Description:
- IC BUFF NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,330
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Product details
Overview
74AC241SCX 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 in high-density PCB layouts. It operates from 2.0V to 6.0V, delivers ±24mA output drive, and features 5.0ns typical propagation delay at 5V with 50pF load.
For engineers reviewing the 74AC241SCX datasheet, pinout, applications, or equivalent options, this device serves as a low-power, high-speed interface solution for bidirectional bus control, address latching, and clock distribution where TTL-level compatibility is not required.
Technical Context
The 74AC241SCX implements CMOS AC logic architecture with rail-to-rail input thresholds (VIH = 2.1V min @ VCC = 4.5V) and fast edge-rate handling (≥125mV/ns). Its dual independent 3-STATE enable inputs (OE1, OE2) allow partitioned bus control across two groups of four outputs (O0–O3 and O4–O7).
It supports mixed-voltage system interfacing via wide VCC range (2.0–6.0V), exhibits low ICC (40µA max) and low IOZ (±2.5µA max), and maintains consistent timing performance across –40°C to +85°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 6.0V - enables direct interface with 3.3V and 5V logic domains without level shifters |
| Output Drive | ±24mA - sufficient to drive standard 50pF bus loads with <10ns propagation delay |
| tPLH / tPHL | 7.0ns max @ 5V, CL=50pF - ensures tight timing margins in high-speed address/data paths |
| IOZ (3-STATE) | ±2.5µA max - minimizes leakage-induced bus contention during tri-state transitions |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation systems |
| Input Thresholds | VIH = 2.1V, VIL = 1.35V @ VCC = 4.5V - provides robust noise margin against ground bounce and crosstalk |
Pinout & Package
74AC241SCX is housed in a 20-lead SOIC package (JEDEC MS-013, 0.300" wide, Package Number M20B), with gull-wing leads and 1.27mm pitch. The package is Pb-free per JEDEC J-STD-020B and rated for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 13, 15, 17, 19 | I0–I7 Inputs | Non-inverting data inputs; accept CMOS-level signals across full VCC range |
| 3, 5, 7, 9 | OE2 Group Enables | Active-HIGH enable for outputs O0–O3; controls bus segment A independently |
| 12, 14, 16, 18 | OE1 Group Enables | Active-HIGH enable for outputs O4–O7; controls bus segment B independently |
| 11, 10, 9, 8, 7, 6, 5, 4 | O0–O7 Outputs | 3-STATE buffered outputs; high-impedance state activated when respective OE is LOW |
| 20 | VCC | Positive supply; decoupling capacitor placement critical for <10ns switching integrity |
| 10 | GND | Ground reference; requires low-inductance connection to minimize ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-STATE enables | OE1 and OE2 allow split-bus control without external gating logic or timing skew |
| Low ICC and IOZ | 40µA max quiescent current and ±2.5µA max 3-STATE leakage reduce system power and bus contention risk |
| High-speed AC logic | 7.0ns max propagation delay at 5V enables use in >100MHz address strobe applications |
| Rail-to-rail input compatibility | Inputs function correctly from 2.0V to 6.0V supply - eliminates need for external biasing in mixed-voltage designs |
| Pb-free SOIC packaging | M20B package complies with JEDEC J-STD-020B - supports lead-free reflow and RoHS-compliant manufacturing |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer with group-selectable 3-STATE control isolates memory banks during read/write cycles. Use Value: Enables clean address transitions with <10ns delay and ±24mA drive, preventing bus contention and setup violations. |
Use Scenario: Interfacing an 8-bit MCU port to a peripheral I/O expander or ADC requiring isolated data latching. IC Role / Device Role / Timing Role: Bidirectional line driver that buffers and isolates MCU GPIO pins from noisy analog subsystems. Use Value: Dual OE inputs allow synchronized enable/disable of two 4-bit data lanes, reducing software overhead and timing jitter. |
| Industrial PLC Backplane | Digital Test Equipment |
|
Use Scenario: Distributing clock and control signals across modular I/O slots in a programmable logic controller chassis. IC Role / Device Role / Timing Role: Clock and strobe driver with low skew and high fanout capability across long PCB traces. Use Value: 7.0ns max tPLH/tPHL and 125mV/ns minimum input edge rate tolerance ensure reliable signal integrity at 20MHz+ backplane rates. |
Use Scenario: Routing stimulus and response signals between FPGA-based pattern generators and DUT interface boards. IC Role / Device Role / Timing Role: High-speed signal conditioner that matches impedance and suppresses reflections on 50Ω test paths. Use Value: ±24mA drive strength and <10ns propagation support precise timing alignment for sub-10ns test vector windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT241SCX | TTL-compatible inputs (VIH = 2.0V, VIL = 0.8V @ 5V); otherwise identical AC specs and pinout | Required when interfacing legacy TTL logic or microcontrollers with weak high-level output drive | Select 74ACT241SCX only if upstream drivers cannot guarantee CMOS VIH levels; otherwise 74AC241SCX offers lower ICC and wider VCC range |
| SN74LVC244APWR | 3.3V-only operation (1.65–3.6V), 24mA drive, but uses different pinout and single OE per 4-bit group | Suitable for modern low-voltage FPGA/CPU interfaces but incompatible without PCB redesign | Choose SN74LVC244APWR only for new 3.3V-only designs; 74AC241SCX remains preferred for 5V legacy or mixed-supply systems |
Compared with 74ACT241SCX and SN74LVC244APWR, the 74AC241SCX uniquely balances wide voltage operation (2.0–6.0V), dual independent OE control, and industrial temperature range - making it the optimal drop-in replacement for legacy 5V bus architectures requiring minimal layout change.
Availability
74AC241SCX is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus interfacing, and industrial PLC backplane applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AC241SCX 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 74AC241SCX belongs to Fairchild's AC-series advanced CMOS logic family, engineered for high-speed, low-power bus interface applications in dense PCB environments where timing precision and supply flexibility are critical.
FAQ
What is the maximum operating voltage for the 74AC241SCX?
The 74AC241SCX supports a supply voltage range of 2.0V to 6.0V, with absolute maximum rating of +7.0V. Operation above 6.0V is outside recommended conditions and may compromise reliability or timing performance. All DC and AC specifications in the datasheet are validated within the 2.0–6.0V range.
Does the 74AC241SCX support TTL-level input compatibility?
No, the 74AC241SCX does not support TTL-level inputs. Its input thresholds are CMOS-compatible (e.g., VIH = 2.1V min @ VCC = 4.5V). For TTL-compatible operation, the pin-compatible 74ACT241SCX variant must be used - it specifies VIH = 2.0V and VIL = 0.8V at 5V.
How many independent 3-STATE enable inputs does the 74AC241SCX have?
The 74AC241SCX has two independent active-HIGH 3-STATE enable inputs: OE1 (pins 12, 14, 16, 18) controls outputs O4–O7, and OE2 (pins 3, 5, 7, 9) controls outputs O0–O3. This allows segmented bus control without external logic or timing synchronization.
What is the typical propagation delay of the 74AC241SCX at 5V?
At VCC = 5.0V and CL = 50pF, the 74AC241SCX exhibits typical propagation delays of 5.0ns for tPLH and 4.5ns for tPHL, with guaranteed maximums of 7.0ns. These values are measured under standard load and temperature conditions per the Fairchild Rev. 1.5 datasheet.
Is the 74AC241SCX RoHS compliant and lead-free?
Yes, the 74AC241SCX is Pb-free and compliant with JEDEC J-STD-020B reflow standards. The SOIC package (M20B) uses lead-free terminations and meets RoHS Directive 2011/65/EU requirements for restricted substances.
74AC241SCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- 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:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74AC241SCX FAQ
1.How can I place an order for 74AC241SCX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC241SCX 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 74AC241SCX reliable?
The price and inventory of 74AC241SCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC241SCX is usually 5 days.
3.What payment methods are accepted for 74AC241SCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC241SCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC241SCX?
74AC241SCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC241SCX 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 74AC241SCX?
For technical support, including 74AC241SCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC241SCX requirements.
6.How does Aetrix verify that 74AC241SCX is sourced from the original manufacturer or authorized distributors?
All 74AC241SCX 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 74AC241SCX meets industry standards.
7.What is the process for return or replacement of 74AC241SCX?
All 74AC241SCX units undergo pre-shipment inspection (PSI). If there is an issue with 74AC241SCX, 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 74AC241SCX part is unused and in its original packaging.
Return procedure for 74AC241SCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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