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onsemi 74ACT241MTC
- Part No.:
- 74ACT241MTC
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ACT241MTC.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,926
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Product details
Overview
74ACT241MTC 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 5V TTL-compatible systems. It operates from 4.5V to 5.5V, delivers ±24mA output drive, and features 7.0ns typical propagation delay at 5V with 50pF load.
For engineers reviewing the 74ACT241MTC datasheet, pinout, applications, or equivalent options, this device serves as a high-density, low-power bus interface solution requiring precise TTL-level input compatibility, fast enable/disable timing, and robust 3-STATE bus contention control.
Technical Context
The 74ACT241MTC implements two independent 4-bit non-inverting buffers, each controlled by its own active-HIGH 3-STATE enable (OE1/OE2), allowing selective bus partitioning. Its ACT logic family ensures TTL-compatible input thresholds (VIH = 2.0V min, VIL = 0.8V max at VCC = 4.5–5.5V) while maintaining CMOS-level output swing and low ICC.
It supports high-speed bidirectional bus operation via tightly matched tPZH/tPLZ (≤10.0ns) and tPHZ/tPLZ (≤11.5ns) enable/disable times at 5V, with guaranteed 24mA sink/source capability per output and ≤0.44V VOL at IOL = 24mA - critical for driving terminated transmission lines and address latches.
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 - sufficient to drive 50Ω transmission lines or 10+ TTL loads |
| Propagation Delay | 7.0ns typical (tPLH/tPHL @ 5V, CL = 50pF) - enables >100MHz bus clocking |
| 3-STATE Enable Time | 6.0ns typical (tPZH @ 5V) - minimizes bus turnaround latency |
| Supply Current | 40µA max ICC @ 5.5V - ultra-low static power for battery-backed or standby systems |
| Input Leakage | ±1.0µA max IIN @ 5.5V - ensures reliable logic levels with high-impedance source networks |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
Pinout & Package
74ACT241MTC is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4mm wide, with 0.65mm lead pitch - optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 13, 15, 17, 19 | I0–I7 (Inputs) | Non-inverting data inputs; TTL-compatible thresholds ensure direct connection to microcontroller GPIO or FPGA I/O banks |
| 3, 5, 7, 9 | OE2 (Enable Group 2) | Active-HIGH enable for outputs O0–O3; decouples lower nibble from bus during partial writes |
| 12, 14, 16, 18 | OE1 (Enable Group 1) | Active-HIGH enable for outputs O4–O7; enables independent control of upper nibble |
| 11, 10, 9, 8, 20, 19, 18, 17 | O0–O7 (Outputs) | 3-STATE non-inverting outputs; high-impedance state prevents bus contention when OE is LOW |
| 10 | GND | Ground reference for all logic and output stages; requires low-inductance local bypass |
| 20 | VCC | +4.5V to +5.5V supply; must be filtered with ≥0.1µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0V min / VIL = 0.8V max at 5V - eliminates level-shifting when interfacing with legacy 5V microcontrollers |
| Dual independent 3-STATE enables | OE1 and OE2 control separate 4-bit output groups - enables flexible bus segmentation without external logic |
| Low ICC and IOZ | 40µA max quiescent current and ±2.5µA max 3-STATE leakage - reduces system standby power and noise coupling |
| High-output drive strength | 24mA sink/source per output - drives standard 50Ω PCB traces or multiple TTL inputs without external buffers |
| Fast enable/disable timing | tPZH ≤ 10.0ns, tPHZ ≤ 11.5ns @ 5V - supports high-throughput burst-mode memory access and DMA transfers |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
|
Use Scenario: Driving 16-bit address bus from a microcontroller with limited drive strength and shared data/address multiplexing. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing TTL-compatible input acceptance and 24mA bus drive; dual OE pins allow dynamic address latch enable timing. Use Value: Eliminates need for discrete transistor arrays or additional logic; enables clean address settling within 7ns propagation window before memory access strobe. |
Use Scenario: Isolating and buffering parallel I/O expansion ports on an industrial PLC controller using 5V logic families. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent 3-STATE control per nibble; synchronizes peripheral read/write handshaking. Use Value: Prevents bus contention during hot-swap or fault recovery; 0.44V VOL at 24mA ensures valid LOW recognition across long backplane traces. |
| Legacy System Bus Transceiver | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing modern FPGA-based logic analyzers to vintage 5V ISA or VME bus systems requiring strict TTL voltage compliance. IC Role / Device Role / Timing Role: Level-adapted buffer with guaranteed VIH/VIL margins; provides bus isolation and drive reinforcement without signal inversion. Use Value: Maintains signal integrity across mixed-voltage domains; 4.4V VOH at 24mA sink meets TTL VIH minimum under loaded conditions. |
Use Scenario: Conditioning digital stimulus signals in automated test equipment where precise edge timing and low crosstalk are required. IC Role / Device Role / Timing Role: Low-skew, low-capacitance (4.5pF CIN) buffer stage preceding high-speed comparators or sampling circuits. Use Value: 7ns propagation delay matching and <10ns enable timing reduce setup/hold uncertainty; CPD = 45pF enables predictable power estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT241DBR | TSSOP-20 package, identical AC/ACT specs, TI-branded; same pinout and timing but different manufacturer qualification. | No functional deviation; suitable for second-source procurement where TI sourcing is preferred. | Select SN74ACT241DBR when TI's extended lifecycle support or alternate logistics channels are required. |
| 74ACT244MTC | Octal buffer with identical pinout and electrical specs, but non-inverting *and* inverting outputs (O0–O3 non-inv, O4–O7 inv); not functionally identical. | Cannot replace 74ACT241MTC in non-inverting-only paths without logic redesign. | Choose 74ACT244MTC only if inverting capability is explicitly needed; otherwise avoid for direct substitution. |
Compared with SN74ACT241DBR, 74ACT241MTC offers identical functionality and timing but differs in manufacturing traceability and qualification scope; compared with 74ACT244MTC, it provides strictly non-inverting output behavior essential for address/data bus integrity without added inversion logic.
Availability
74ACT241MTC is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interface modules, and test instrumentation requiring stable component supply, long-term obsolescence management, and verified 5V TTL-compatibility.
Supply support for 74ACT241MTC 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 leading designer of high-performance analog and logic ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and automotive systems.
The 74ACT241MTC belongs to Fairchild's ACT advanced CMOS logic family, engineered specifically for 5V systems demanding TTL compatibility, low power, and high-speed bus interfacing without signal inversion.
FAQ
What is the supply voltage range for the 74ACT241MTC?
The 74ACT241MTC operates exclusively within a 4.5V to 5.5V supply range, as defined in its Recommended Operating Conditions. This narrow window ensures TTL-compatible input thresholds and guarantees ±24mA output drive performance. Operation outside this range may result in undefined logic states or degraded timing, and is not supported per the datasheet.
Does the 74ACT241MTC support 3.3V logic interfaces?
No, the 74ACT241MTC does not support 3.3V operation. Its ACT family specification mandates 4.5–5.5V VCC, and its input thresholds (VIH = 2.0V min, VIL = 0.8V max) are optimized for 5V TTL signaling. Direct connection to 3.3V systems risks unreliable HIGH detection and violates absolute maximum ratings for VI.
How are the two 3-STATE enable inputs (OE1 and OE2) used in practice?
OE1 controls outputs O4–O7, and OE2 controls O0–O3, enabling independent bus segment control. In memory systems, OE2 may synchronize with lower-address writes while OE1 handles upper-address latching. This separation avoids full-bus contention and allows partial updates - a key advantage over single-enable octal buffers like the 74ACT244MTC.
What is the maximum capacitive load the 74ACT241MTC can drive reliably?
The 74ACT241MTC is characterized for CL = 50pF in AC timing specifications, with 7.0ns typical propagation delay. While it can drive higher capacitance, timing degrades linearly - e.g., 100pF load increases tPLH/tPHL by ~2–3ns. For loads >75pF, layout optimization or local termination is recommended to maintain signal integrity.
Is the 74ACT241MTC pin-compatible with the 74AC241MTC?
Yes, the 74ACT241MTC and 74AC241MTC share identical pinout, package (MTC20), and functional block diagram. However, they differ electrically: 74AC241 accepts 2.0–6.0V VCC and has CMOS-input thresholds, whereas 74ACT241 requires 4.5–5.5V and uses TTL-compatible inputs. Swapping them requires verifying input voltage compatibility.
74ACT241MTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74ACT241MTC FAQ
1.How can I place an order for 74ACT241MTC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT241MTC 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 74ACT241MTC reliable?
The price and inventory of 74ACT241MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT241MTC is usually 5 days.
3.What payment methods are accepted for 74ACT241MTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT241MTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT241MTC?
74ACT241MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT241MTC 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 74ACT241MTC?
For technical support, including 74ACT241MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT241MTC requirements.
6.How does Aetrix verify that 74ACT241MTC is sourced from the original manufacturer or authorized distributors?
All 74ACT241MTC 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 74ACT241MTC meets industry standards.
7.What is the process for return or replacement of 74ACT241MTC?
All 74ACT241MTC units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT241MTC, 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 74ACT241MTC part is unused and in its original packaging.
Return procedure for 74ACT241MTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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