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onsemi 74AC241PC
- Part No.:
- 74AC241PC
- Manufacturer:
- onsemi
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74AC241PC.pdf
- Description:
- IC BUFF NON-INVERT 6V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,947
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Product details
Overview
74AC241PC 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 TTL/CMOS systems operating at 2.0–6.0V supply. It delivers ±24mA output drive, supports –40°C to +85°C operation, and features low ICC (40µA max) and low IOZ (±2.5µA max) for high-density PCB applications.
For engineers reviewing the 74AC241PC datasheet, pinout, applications, or equivalent options, this device is selected for bus buffering where low power, fast propagation (5.0–10.0ns), TTL-compatible timing margins, and dual independent output enables are critical - especially in legacy industrial control and memory interface designs.
Technical Context
The 74AC241PC implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-HIGH 3-STATE enable (OE1 on pins 12/14/16/18; OE2 on pins 3/5/7/9). Its AC logic family ensures CMOS-level input thresholds and rail-to-rail output swing across 2.0–6.0V VCC.
Propagation delays are specified at CL = 50pF and VCC = 3.3V or 5.0V, with tPLH/tPHL ≤ 10.0ns (max), tPZH/tPZL ≤ 13.0ns (max), and tPHZ/tPLZ ≤ 12.5ns (max). Input edge rate requirements are ≥125mV/ns for VIN transitions between 30%–70% of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0V to 6.0V - supports mixed-voltage system interfacing and 3.3V/5V legacy compatibility |
| Output Drive | ±24mA - sufficient to directly drive 50pF bus loads or multiple TTL inputs without external buffers |
| Propagation Delay | ≤10.0ns (max, VCC = 5.0V, CL = 50pF) - enables reliable timing in sub-100MHz address/data paths |
| 3-STATE Enable Time | ≤13.0ns (max, tPZH/tPZL) - ensures minimal bus contention during output activation |
| Quiescent ICC | 40µA (max, TA = –40°C to +85°C) - reduces static power in always-on control logic sections |
| Input Leakage | ±0.1µA (max, VCC = 5.5V) - prevents unintended logic state shifts in high-impedance input networks |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controller and instrumentation environments |
Pinout & Package
74AC241PC is supplied in a 20-lead Plastic Dual In-line Package (PDIP), JEDEC MS-001, 0.300" wide - distinct from SOIC (M20B), SOP (M20D), and TSSOP (MTC20) variants listed for other suffixes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 10, 11, 13, 15 | Inputs I0–I7 | Non-inverting data inputs; accept CMOS-level thresholds (VIH ≥ 2.1V @ VCC = 4.5V) |
| 3, 5, 7, 9 | OE2 terminals | Active-HIGH enable for outputs O0–O3; all four share same control signal |
| 12, 14, 16, 18 | OE1 terminals | Active-HIGH enable for outputs O4–O7; electrically isolated from OE2 group |
| 17, 19, 20, 8, 11, 13, 15, 16 | Outputs O0–O7 | 3-STATE non-inverting outputs; high-impedance when respective OE is LOW |
| 10 | VCC | Positive supply pin - must be decoupled locally due to fast switching transients |
| 5 | GND | Ground reference - shared return path for all inputs, outputs, and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-STATE enables | OE1 and OE2 allow selective activation of upper/lower 4-bit output groups - essential for time-multiplexed bus arbitration |
| Low ICC and IOZ | ICC ≤ 40µA and IOZ ≤ ±2.5µA reduce standby current and leakage-induced bus float in powered-down subsystems |
| High-output drive capability | ±24mA sink/source per output meets minimum drive requirement for 10 LSTTL loads or 50pF transmission lines |
| Fast AC propagation | tPLH/tPHL ≤ 7.0ns (typical @ 5.0V) enables use in 100+ MHz clock domains with margin for trace delay |
| JEDEC-standard pinout | Compatible with industry-standard 74-series layout conventions - simplifies schematic reuse and PCB library management |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or EPROM in industrial PLC backplane. IC Role / Device Role / Timing Role: Non-inverting octal buffer isolating MCU address pins from capacitive bus load; OE1/OE2 synchronized to memory access strobes. Use Value: Prevents address skew and timing violations caused by >30pF bus capacitance while maintaining setup/hold margins under worst-case VCC and temperature. |
Use Scenario: Interfacing 8-bit microcontroller port to shared peripheral bus with multiple SPI/I²C devices. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling MCU to assert control signals (CS, WR, RD) while allowing peripherals to respond via same lines. Use Value: Eliminates need for discrete transistors or additional logic; dual OE allows dynamic partitioning of bus segments during multi-device transactions. |
| Legacy System Upgrade | Test Equipment Signal Conditioning |
Use Scenario: Replacing obsolete 74LS241 in aging test fixture controller board requiring extended temperature support. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering lower power and higher noise immunity than LS logic at same 5V supply. Use Value: Reduces board-level heat generation by >70% and improves VIH/VIL noise margins by 300mV over LS family - extending field life of legacy hardware. |
Use Scenario: Level-shifting and fan-out amplification for digital trigger signals in automated test equipment (ATE) mainframe. IC Role / Device Role / Timing Role: Buffering low-jitter clock and trigger edges from FPGA to multiple DUT interface cards with matched trace lengths. Use Value: Ensures <100ps inter-channel skew across 8 outputs and maintains edge integrity (tR/tF < 3ns) into 50Ω loads - critical for synchronous sampling accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT241PC | TTL-compatible inputs (VIH = 2.0V, VIL = 0.8V @ VCC = 5V); otherwise identical AC performance and pinout | Better interoperability with legacy 74LS/74ALS circuits; requires no level-shifting when mixing with TTL sources | Select 74ACT241PC when driving from standard TTL outputs; choose 74AC241PC for pure CMOS input compatibility and lowest ICC. |
| SN74LVC241APWR | 3.3V-only operation (1.65–3.6V), smaller TSSOP-20 package, lower drive (±24mA still met), but faster tPLH/tPHL (≤5.5ns) | Not suitable for 5V systems; requires voltage translation if interfacing with 5V peripherals | Choose SN74LVC241APWR for new 3.3V designs prioritizing speed and board space; retain 74AC241PC for 5V legacy compatibility and PDIP availability. |
Compared with 74ACT241PC and SN74LVC241APWR, the 74AC241PC uniquely balances 2.0–6.0V operation, PDIP packaging for through-hole prototyping, and proven reliability in long-lifecycle industrial deployments - making it the preferred choice where voltage flexibility and mechanical robustness outweigh marginal speed gains.
Availability
74AC241PC is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus interfacing, legacy system upgrades, and test equipment signal conditioning requiring stable component supply across extended product lifecycles.
Supply support for 74AC241PC 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 74AC241PC belongs to Fairchild's AC logic family - engineered for high-speed, low-power CMOS-compatible buffering in memory, bus, and clock distribution applications where reliability and wide VCC range are essential.
FAQ
What is the maximum supply voltage rating for the 74AC241PC?
The 74AC241PC has an absolute maximum supply voltage (VCC) rating of +7.0V, but its recommended operating range is 2.0V to 6.0V. Operation above 6.0V risks exceeding guaranteed DC electrical characteristics and may accelerate parametric drift over time. For sustained reliability, maintain VCC within the recommended range - especially in temperature-critical applications where junction heating compounds stress.
Does the 74AC241PC support true bidirectional data flow?
No, the 74AC241PC is a unidirectional non-inverting buffer - inputs (I0–I7) drive corresponding outputs (O0–O7) only. It lacks internal direction control or bus transceiver logic. While its 3-STATE outputs allow connection to shared buses, external control logic must manage data direction; the device itself does not auto-sense or switch direction like a transceiver such as the 74AC245.
Can OE1 and OE2 be tied together for single-enable operation in the 74AC241PC?
Yes, OE1 (pins 12/14/16/18) and OE2 (pins 3/5/7/9) can be externally wired together and driven by one control signal, effectively converting the 74AC241PC into an 8-bit single-enable buffer. This configuration is electrically valid and commonly used - though it forfeits independent control of the two 4-bit output groups, which is the primary functional distinction from the 74AC240.
Is the 74AC241PC RoHS-compliant and lead-free?
Yes, the 74AC241PC is manufactured per JEDEC J-STD-020B for lead-free (Pb-Free) packaging. Its PDIP package uses matte tin lead finish and complies with RoHS Directive 2011/65/EU. No exemptions apply, and full material declarations are available upon request for compliance documentation in medical or aerospace programs.
What is the typical input capacitance of the 74AC241PC?
The 74AC241PC has a typical input capacitance (CIN) of 4.5pF per pin, measured with VCC open. This low value minimizes loading on upstream drivers - critical when cascading multiple logic stages or driving from high-impedance sources like microcontroller GPIOs configured as open-drain. Total capacitive load increases linearly with number of inputs driven.
74AC241PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- 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:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
74AC241PC FAQ
1.How can I place an order for 74AC241PC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC241PC 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 74AC241PC reliable?
The price and inventory of 74AC241PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC241PC is usually 5 days.
3.What payment methods are accepted for 74AC241PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC241PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC241PC?
74AC241PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC241PC 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 74AC241PC?
For technical support, including 74AC241PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC241PC requirements.
6.How does Aetrix verify that 74AC241PC is sourced from the original manufacturer or authorized distributors?
All 74AC241PC 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 74AC241PC meets industry standards.
7.What is the process for return or replacement of 74AC241PC?
All 74AC241PC units undergo pre-shipment inspection (PSI). If there is an issue with 74AC241PC, 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 74AC241PC part is unused and in its original packaging.
Return procedure for 74AC241PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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