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Texas Instruments 74FCT2541ATSOCTG4
- Part No.:
- 74FCT2541ATSOCTG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74FCT2541ATSOCTG4.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,309
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Product details
Overview
74FCT2541ATSOCTG4 from Texas Instruments is an octal 3-state noninverting buffer/line driver with edge-rate control and 25-Ω output series resistors, designed for memory-address driving, clock distribution, and bus-oriented transmitter/receiver applications. It operates at 4.75–5.25 V, delivers ±15 mA drive strength, achieves 4.8 ns max propagation delay, and supports partial-power-down via Ioff.
For engineers reviewing the 74FCT2541ATSOCTG4 datasheet, 74FCT2541ATSOCTG4 pinout, 74FCT2541ATSOCTG4 application, or 74FCT2541ATSOCTG4 equivalent, key selection criteria include its 25-Ω integrated output termination, TTL/CMOS-compatible logic levels, –40°C to 85°C industrial temperature range, and SOIC-20 package with 2.65 mm max height.
Technical Context
This device implements dual 3-state enable controls (OEA and OEB) for independent group-level output gating, enabling flexible bus arbitration in multi-driver systems. Its edge-rate control circuitry shapes output transitions to suppress transmission-line reflections without external components.
The integrated 25-Ω series output resistors-measured at 20–40 Ω across conditions-work with standard PCB trace impedances to minimize ringing. Ioff protection limits reverse current to ±1 µA when VCC = 0 V, supporting live-insertion and hot-swap scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - Ensures compatibility with 5-V TTL and mixed-voltage systems. |
| Propagation Delay | Max 4.8 ns - Enables high-speed address/data buffering in 25-MHz+ bus systems. |
| Output Drive | ±15 mA - Sinks 12 mA / sources 15 mA, sufficient for driving 50-pF loads at full speed. |
| Output Termination | 20–40 Ω - Integrated series resistor reduces reflection noise on PCB traces without discrete components. |
| Ioff Current | ±1 µA at VCC = 0 V - Prevents backflow during partial power-down, protecting powered subsystems. |
| ESD Protection | 2000-V HBM - Meets JESD22-A114A, supporting robust handling in manufacturing and field environments. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded and communications equipment. |
Pinout & Package
74FCT2541ATSOCTG4 is housed in a 20-pin SOIC (DW) package, 7.6 mm × 12.8 mm footprint, 2.65 mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enables - Both must be low for outputs O0–O7 to drive; independent control allows split-bus operation. |
| 2–9 | D0–D7 | Data inputs - Noninverting buffers accept TTL/CMOS logic levels; VIH = 2 V, VIL = 0.8 V. |
| 11–18 | O0–O7 | 3-state outputs - Each features 25-Ω series resistance and matched rise/fall times for clean signal integrity. |
| 10 | GND | Ground reference - Dedicated return path for output current and internal logic. |
| 20 | VCC | Power supply - Must be decoupled locally; ICC active current ≤ 0.2 mA, dynamic ICCD ≤ 0.12 mA/MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate control | Controlled slew rate reduces EMI and eliminates need for external RC damping networks. |
| 25-Ω output series resistors | On-die termination matches typical PCB trace impedance, suppressing reflections in point-to-point and stubbed buses. |
| Ioff partial-power-down support | Enables safe operation in hot-plug and power-gated systems by blocking current flow when VCC = 0 V. |
| TTL/CMOS input compatibility | Accepts 0.8 V/2.0 V thresholds and drives 3.3 V VOH (typ) - interoperates with legacy 5-V and newer mixed-voltage logic. |
| Matched rise/fall times | Minimizes duty-cycle distortion in clock distribution paths, critical for synchronous bus timing margins. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting octal buffer with 3-state control isolates address drivers during bus contention or standby. Use Value: Integrated 25-Ω termination prevents address line ringing that could cause misreads, especially at >20 MHz access rates. | Use Scenario: Distributing a system clock to multiple peripherals (e.g., ADC, DAC, FPGA config pins) with minimal skew and jitter. IC Role / Device Role / Timing Role: Low-skew, matched-edge buffer ensures simultaneous clock edge arrival across loads. Use Value: Matched rise/fall times and 4.8 ns max tPLH/tPHL preserve duty cycle integrity, reducing setup/hold violations. |
| Industrial Bus Transceiver Interface | Legacy System Signal Conditioning |
Use Scenario: Interfacing a modern MCU GPIO bank to a legacy parallel bus (e.g., ISA-style control/data lines) with long trace runs. IC Role / Device Role / Timing Role: Bidirectional-capable line driver (with external direction logic) providing noise-immune signal translation. Use Value: Edge-rate control + on-die termination eliminates external termination resistors and reduces board space by ≥8 components per channel. | Use Scenario: Upgrading aging 74FCT541-based designs to reduce system-level noise without PCB redesign. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement offering identical function with enhanced signal integrity. Use Value: Same 4.8 ns speed grade and SOIC-20 footprint as CY74FCT541T, but adds 25-Ω termination and improved noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT2541CTSOC | 4.1 ns max propagation delay (vs. 4.8 ns), same SOIC-20 package and Ioff support. | Better timing margin for high-frequency address latching or clock fanout above 25 MHz. | Select when propagation delay is critical and 0.7 ns improvement justifies sourcing the 'C' speed grade. |
| SN74FCT2541ATSO | Same 4.8 ns speed, identical pinout and electrical specs; TI's current-marketing part number for this variant. | No functional difference - SN74FCT2541ATSO is the updated orderable designation per TI's naming convention. | Preferred for new designs due to active status and broader distributor availability than legacy CY-prefix variants. |
Compared with CY74FCT2541CTSOC, 74FCT2541ATSOCTG4 trades 0.7 ns speed for broader voltage tolerance margin and identical noise suppression; versus SN74FCT2541ATSO, it is functionally identical but reflects older packaging and marking conventions - both remain electrically and mechanically interchangeable in existing layouts.
Availability
74FCT2541ATSOCTG4 is available at Aetrix Electronics and suitable for memory-address buffering, clock distribution, and industrial bus interface applications requiring stable component supply and long-term industrial temperature support.
Supply support for 74FCT2541ATSOCTG4 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
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74FCT family was engineered for high-speed, low-noise 5-V digital interfacing - specifically targeting memory, bus, and clock applications where signal integrity and power efficiency supersede raw speed alone.
FAQ
What is the maximum operating temperature range for the 74FCT2541ATSOCTG4?
The 74FCT2541ATSOCTG4 is rated for continuous operation from –40°C to +85°C ambient temperature. This industrial-grade specification ensures reliable performance in embedded controllers, factory automation hardware, and outdoor communications equipment where thermal cycling and extended temperature exposure occur. The SOIC package's 58°C/W thermal impedance supports this range under typical PCB copper pour conditions.
Does the 74FCT2541ATSOCTG4 support hot-swap or partial-power-down operation?
Yes, the 74FCT2541ATSOCTG4 includes Ioff circuitry that disables outputs and limits reverse current to ±1 µA when VCC = 0 V. This feature enables safe insertion into live backplanes or operation in systems where subsystems power up/down asynchronously. The 74FCT2541ATSOCTG4 maintains isolation between powered and unpowered sections without external protection diodes or sequencing controls.
How does the 25-Ω output series resistance in the 74FCT2541ATSOCTG4 improve signal integrity?
The 74FCT2541ATSOCTG4 integrates 20–40 Ω series resistors at each output, matching typical PCB microstrip impedances (50–75 Ω). This damps reflections caused by impedance discontinuities at connectors or stubs, reducing overshoot, undershoot, and ringing. As a result, the 74FCT2541ATSOCTG4 eliminates the need for eight discrete 25-Ω resistors in point-to-point or daisy-chained bus topologies.
Is the 74FCT2541ATSOCTG4 pin-compatible with older 74FCT541 devices?
Yes, the 74FCT2541ATSOCTG4 is functionally and pinout-compatible with CY74FCT541T and SN74FCT541AT, sharing identical SOIC-20 pin assignments, logic behavior, and DC specifications. It replaces those parts directly to add edge-rate control and integrated termination - no PCB layout changes are required, making it ideal for noise-reduction upgrades in legacy designs.
What are the absolute maximum ratings for supply voltage and input voltage on the 74FCT2541ATSOCTG4?
The 74FCT2541ATSOCTG4 has an absolute maximum supply voltage of –0.5 V to +7 V and absolute maximum input/output voltage range of –0.5 V to +7 V. These ratings allow safe operation during transient overvoltage events and simplify design margining. However, recommended operating conditions specify VCC = 4.75–5.25 V and VIH/VIL = 2.0 V/0.8 V to guarantee correct logic functionality and timing compliance.
74FCT2541ATSOCTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 12mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74FCT2541ATSOCTG4 FAQ
1.How can I place an order for 74FCT2541ATSOCTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT2541ATSOCTG4 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 74FCT2541ATSOCTG4 reliable?
The price and inventory of 74FCT2541ATSOCTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT2541ATSOCTG4 is usually 5 days.
3.What payment methods are accepted for 74FCT2541ATSOCTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT2541ATSOCTG4 transactions.
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4.How is shipping managed for 74FCT2541ATSOCTG4?
74FCT2541ATSOCTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT2541ATSOCTG4 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 74FCT2541ATSOCTG4?
For technical support, including 74FCT2541ATSOCTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT2541ATSOCTG4 requirements.
6.How does Aetrix verify that 74FCT2541ATSOCTG4 is sourced from the original manufacturer or authorized distributors?
All 74FCT2541ATSOCTG4 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 74FCT2541ATSOCTG4 meets industry standards.
7.What is the process for return or replacement of 74FCT2541ATSOCTG4?
All 74FCT2541ATSOCTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT2541ATSOCTG4, 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 74FCT2541ATSOCTG4 part is unused and in its original packaging.
Return procedure for 74FCT2541ATSOCTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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