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onsemi 74ACT241PC
- Part No.:
- 74ACT241PC
- Manufacturer:
- onsemi
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74ACT241PC.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,104
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Product details
Overview
74ACT241PC 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.
For engineers reviewing the 74ACT241PC datasheet, pinout, applications, or equivalent options, key selection criteria include TTL input compatibility, dual independent output-enable control, 3-STATE bus driving capability, and SOIC-20 packaging for legacy PCB compatibility.
Technical Context
The 74ACT241PC implements two independent 4-bit non-inverting buffers, each controlled by its own active-HIGH 3-STATE enable (OE1/OE2). Its ACT logic family ensures TTL-level input thresholds (VIH = 2.0V min, VIL = 0.8V max at VCC = 4.5–5.5V) while delivering CMOS-level noise immunity and rail-to-rail output swing.
Propagation delays are specified at 5.0V: tPLH/tPHL ≤ 10.0 ns, tPZH/tPZL ≤ 10.0 ns, and tPHZ/tPLZ ≤ 11.5 ns (CL = 50pF). Output disable timing supports clean bus release during arbitration, and ICC remains ≤ 40 µA in quiescent state across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT - TTL-compatible inputs with CMOS output drive and low ICC |
| Supply Voltage Range | 4.5V to 5.5V - Matches standard 5V TTL/CMOS system rails |
| Output Drive | ±24mA - Sustains robust signal integrity on loaded buses or memory address lines |
| Propagation Delay | ≤10.0 ns - Enables reliable operation in 50 MHz–100 MHz address/data paths |
| 3-STATE Enable Polarity | Active HIGH (OE1, OE2) - Simplifies direct connection to microcontroller GPIO or bus controller signals |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems |
| Input Leakage | ±1.0 µA max - Minimizes loading on upstream logic or pull-up networks |
Pinout & Package
74ACT241PC is supplied in a 20-lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" wide (Package Number M20B), with standard 1.27 mm pitch and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 8, 10, 13, 15 | Inputs I0–I7 | Non-inverting data inputs; accept TTL logic levels (0.8V/2.0V thresholds) |
| 3, 5, 7, 9 | OE2 Control Inputs | Active-HIGH enable for outputs O4–O7; allows independent gating of upper nibble |
| 12, 14, 16, 18 | OE1 Control Inputs | Active-HIGH enable for outputs O0–O3; enables split-bus control architecture |
| 11, 17, 19, 20, 13, 15, 16, 18 | Outputs O0–O7 | 3-STATE non-inverting outputs; high-impedance when respective OE is LOW |
| 10 | VCC | Positive supply (4.5–5.5V); decoupling capacitor required adjacent to pin |
| 20 | GND | Ground reference; low-inductance return path critical for noise control |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0V min / VIL = 0.8V max at 5V - Interoperates directly with legacy 74LS/74F logic without level shifters |
| Dual independent 3-STATE enables | OE1 controls O0–O3; OE2 controls O4–O7 - Enables flexible bus segmentation and partial line driving |
| Low ICC and IOZ | ICC ≤ 40 µA; IOZ ≤ ±2.5 µA - Reduces static power and leakage-induced bus contention in idle states |
| High-output current drive | IOH/IOL = ±24mA - Drives 50pF loads with <10ns edge rates and maintains VOL ≤ 0.44V under full load |
| Industrial temperature range | –40°C to +85°C - Supports deployment in programmable logic controllers and motor drive I/O modules |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address bus from a microcontroller with limited drive strength. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing fanout and voltage-level translation between MCU and SRAM/EPROM address pins. Use Value: Eliminates need for discrete transistor arrays; dual OE pins allow dynamic bank selection without address glitches. | Use Scenario: Isolating and buffering parallel data bus between FPGA and external peripherals. IC Role / Device Role / Timing Role: Bidirectional-capable 3-STATE line driver enabling shared bus arbitration between master and slave devices. Use Value: ±24mA drive ensures signal integrity across 10 cm traces; fast enable/disable timing prevents bus contention during handshaking. |
| Industrial Backplane Driver | Legacy System Upgrade |
Use Scenario: Transmitting control signals across noisy factory-floor backplanes. IC Role / Device Role / Timing Role: Robust line driver with high noise margin and rail-to-rail output swing for EMI-prone environments. Use Value: ACT family's 400 mV noise margin at 5V and low ICC reduce ground bounce and crosstalk in dense I/O modules. | Use Scenario: Replacing obsolete 74LS241 in repair or obsolescence-mitigation programs. IC Role / Device Role / Timing Role: Pin-compatible upgrade offering lower power, higher speed, and improved drive vs. bipolar TTL. Use Value: Direct drop-in replacement with no PCB change; eliminates need for external pull-ups or heat sinks. |
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 |
|---|---|---|---|
| SN74ACT241N | Dual OE inputs, same AC/ACT specs, PDIP-20 package | Through-hole mounting; longer lead inductance limits >25 MHz use | Select for prototyping, legacy through-hole boards, or manual assembly |
| MC74ACT241DG | Identical logic and timing; SOIC-20, but ON Semiconductor branding and minor thermal spec variance | No functional difference; qualified for automotive temp range (–40°C to +125°C) | Select when extended temperature qualification or alternate supply chain is required |
Compared with SN74ACT241N and MC74ACT241DG, the 74ACT241PC offers identical core functionality in JEDEC-standard SOIC-20, optimized for surface-mount industrial control systems where board space and reflow compatibility are prioritized over through-hole serviceability or automotive qualification.
Availability
74ACT241PC is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and legacy system upgrades requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT241PC 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 designer of analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.
The 74ACT241PC belongs to Fairchild's ACT advanced CMOS logic family, engineered for TTL-system interoperability with reduced power and enhanced speed in memory addressing and bus interface roles.
FAQ
Is the 74ACT241PC pin-compatible with the 74LS241?
Yes, the 74ACT241PC is pin-compatible with the 74LS241 in SOIC-20 (M20B) packaging. Both share identical pin assignments for I0–I7, O0–O7, OE1, OE2, VCC, and GND. However, the 74ACT241PC uses CMOS output stages and TTL-compatible inputs, eliminating the need for external pull-ups and reducing power consumption by >90% versus the bipolar 74LS241.
What is the maximum clock frequency supported by the 74ACT241PC?
The 74ACT241PC does not operate on a clock; it is a combinatorial buffer. Its usable data rate depends on propagation delay and load. With tPLH/tPHL ≤ 10.0 ns and CL = 50 pF, it reliably supports address/data bus transitions up to ~50 MHz in typical PCB layouts. The 74ACT241PC's fast enable/disable timing (tPZH ≤ 10.0 ns) also supports dynamic bus arbitration at similar rates.
Does the 74ACT241PC require external pull-up resistors on its inputs?
No, the 74ACT241PC does not require external pull-up resistors on its inputs. Its TTL-compatible inputs have guaranteed VIH ≥ 2.0V and VIL ≤ 0.8V at VCC = 5V, allowing direct interfacing with 74LS, 74F, and microcontroller GPIO without pull-ups. Input leakage is ≤ ±1.0 µA, minimizing unintended biasing.
Can both OE1 and OE2 be tied together for single-enable operation?
Yes, OE1 and OE2 can be connected together to function as a single 3-STATE enable for all eight outputs. This configuration simplifies control logic in applications where full-octal gating is sufficient. The 74ACT241PC's input structure tolerates this connection, and no additional components are needed - the 74ACT241PC maintains full specification compliance under this usage.
What is the thermal performance of the 74ACT241PC in SOIC-20 package?
The 74ACT241PC in SOIC-20 (M20B) has a junction-to-ambient thermal resistance (θJA) of 100°C/W per Fairchild's characterization. At worst-case 5.5V/85°C operation with all outputs sourcing 24mA, total power dissipation remains <150 mW, resulting in <15°C junction rise above ambient - well within the 140°C absolute max rating. No heatsink is required for standard industrial use.
74ACT241PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
74ACT241PC FAQ
1.How can I place an order for 74ACT241PC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT241PC 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 74ACT241PC reliable?
The price and inventory of 74ACT241PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT241PC is usually 5 days.
3.What payment methods are accepted for 74ACT241PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT241PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT241PC?
74ACT241PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT241PC 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 74ACT241PC?
For technical support, including 74ACT241PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT241PC requirements.
6.How does Aetrix verify that 74ACT241PC is sourced from the original manufacturer or authorized distributors?
All 74ACT241PC 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 74ACT241PC meets industry standards.
7.What is the process for return or replacement of 74ACT241PC?
All 74ACT241PC units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT241PC, 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 74ACT241PC part is unused and in its original packaging.
Return procedure for 74ACT241PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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