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Texas Instruments CY74FCT2541CTSOC
- Part No.:
- CY74FCT2541CTSOC
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2541CTSOC.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:106
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Product details
Overview
CY74FCT2541CTSOC from Texas Instruments is an octal 3-state noninverting buffer/line driver with 25-Ω output series resistors, designed for memory-address driving, clock distribution, and bus-oriented transmitter/receiver applications in 5-V TTL/CMOS systems. It features 4.1 ns max propagation delay, ±15 mA output drive, Ioff partial-power-down support, and reduced transmission-line reflection noise.
For engineers reviewing the CY74FCT2541CTSOC datasheet, CY74FCT2541CTSOC pinout, CY74FCT2541CTSOC application, or CY74FCT2541CTSOC equivalent, key selection criteria include its 20-pin SOIC (DW) package, dual active-low 3-state enable inputs (OEA/OEB), matched rise/fall times, and compatibility with legacy FCT/F logic families in noise-sensitive digital interfaces.
Technical Context
This device implements edge-rate control circuitry to suppress switching noise while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) and CMOS-level output swing (VOH = 3.3 V typ at 5 V). Its dual independent 3-state enables allow flexible bus partitioning across eight data channels.
The integrated 25-Ω output series resistors are factory-trimmed and do not require external termination. Ioff protection activates when VCC = 0 V, limiting backflow current to ±1 µA per I/O terminal - enabling safe hot-insertion and partial-power-down operation in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation delay | 4.1 ns max (D→O), enabling high-speed bus timing at >100 MHz system clocks |
| Output drive | –15 mA source / +12 mA sink, sufficient to drive 50-Ω transmission lines directly |
| Supply voltage | 4.75 V to 5.25 V, ensuring robust operation across industrial-grade 5-V rails |
| Ioff current | ±1 µA at VCC = 0 V, preventing damage during live insertion or power sequencing |
| ESD rating | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 requirements |
| Input hysteresis | 0.2 V typical, improving noise immunity on slow-rising or noisy control signals |
| Output impedance | 20–40 Ω (typ 25 Ω), reducing signal reflections without external series resistors |
Pinout & Package
SOIC-20 (DW package), 7.6 mm × 12.83 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs; both must be low for output drivers to be active |
| 2–9 | D0–D7 | Noninverting data inputs; TTL/CMOS compatible with 0.8 V/2.0 V thresholds |
| 11–18 | O0–O7 | 3-state buffered outputs with integrated 25-Ω series resistance |
| 10 | GND | Ground reference for all logic and output stages |
| 20 | VCC | 5-V supply rail; powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 25-Ω output series resistors | Eliminates need for external termination components, reducing BOM count and PCB area in high-speed bus designs |
| Edge-rate control circuitry | Controls slew rate to minimize simultaneous switching noise (SSN) and EMI in dense digital layouts |
| Ioff partial-power-down support | Prevents damaging current flow when VCC is off but I/O pins remain biased, critical for hot-swap and multi-rail systems |
| Matched rise/fall times | Ensures symmetrical signal edges, reducing duty-cycle distortion in clock distribution paths |
| Function/pinout compatibility with FCT/F logic | Enables drop-in replacement of legacy CY74FCT541T without layout changes or firmware updates |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices sharing a common bus. IC Role / Device Role / Timing Role: Noninverting octal buffer with 3-state control, isolating address bus segments during memory access arbitration. Use Value: Integrated 25-Ω output resistors suppress ringing on long PCB traces, preserving setup/hold margins at >20 MHz address rates. | Use Scenario: Distributing a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with minimal skew. IC Role / Device Role / Timing Role: Low-skew, low-jitter fanout buffer with matched rise/fall times and TTL-compatible output levels. Use Value: 4.1 ns max tPLH/tPHL ensures sub-nanosecond inter-channel skew, supporting tight timing budgets in real-time control systems. |
| Bus Transceiver Interface | Noise-Sensitive Industrial Control |
Use Scenario: Bidirectional data transfer between a microprocessor and peripheral ICs via shared data bus with direction control. IC Role / Device Role / Timing Role: Octal 3-state line driver acting as unidirectional segment of a larger transceiver system (paired with receiver counterparts). Use Value: Dual OEA/OEB enables independent gating of two 4-bit groups, simplifying bus arbitration logic and reducing gate count. | Use Scenario: Interfacing noisy industrial sensors (e.g., encoders, analog front-ends) to clean digital processing units in PLC or motor drives. IC Role / Device Role / Timing Role: Isolation buffer with high noise immunity (0.2 V hysteresis, 2000-V HBM ESD) and controlled edge rates. Use Value: Edge-rate control and on-die termination reduce radiated emissions by >6 dB compared to standard buffers, easing EMC certification. |
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 |
|---|---|---|---|
| CY74FCT2541ATSOC | Slower 4.8 ns max propagation delay; identical pinout, package, and DC specs | Suitable for cost-sensitive, lower-speed designs where 4.1 ns timing margin is unnecessary | Select when system clock rates ≤ 80 MHz and thermal budget allows higher ICCD |
| SN74FCT2541CTSO | Same speed grade and electrical specs; manufactured by TI under alternate part numbering (non-CY prefix) | Identical functional behavior and qualification; used interchangeably in TI's own reference designs | Preferred for new designs requiring full TI warranty and long-term supply assurance |
Compared with CY74FCT2541ATSOC and SN74FCT2541CTSO, the CY74FCT2541CTSOC delivers the fastest propagation delay in the family (4.1 ns), making it optimal for high-speed memory interfaces and clock fanout where timing closure is critical - while retaining full pin, package, and logic compatibility.
Availability
CY74FCT2541CTSOC is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, and industrial bus interfaces requiring stable component supply, long-lifecycle support, and guaranteed RoHS compliance.
Supply support for CY74FCT2541CTSOC 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 specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CY74FCT2541CTSOC belongs to TI's FCT logic family, engineered for low-noise, high-speed 5-V digital interfacing with backward compatibility to legacy TTL systems and forward compatibility with mixed-voltage CMOS designs.
FAQ
What is the maximum operating temperature range for the CY74FCT2541CTSOC?
The CY74FCT2541CTSOC is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade environmental requirements. This range is validated across all electrical parameters including propagation delay, output drive strength, and Ioff leakage, ensuring reliable performance in demanding embedded environments such as motor control and factory automation systems where the CY74FCT2541CTSOC is commonly deployed.
Does the CY74FCT2541CTSOC support hot-swap or partial-power-down operation?
Yes, the CY74FCT2541CTSOC supports partial-power-down operation via its Ioff circuitry. When VCC = 0 V, Ioff limits current backflow to ±1 µA per I/O terminal, protecting the device and upstream circuitry during live insertion or asymmetric power sequencing. This capability is explicitly verified in the datasheet's absolute maximum ratings and recommended operating conditions, making the CY74FCT2541CTSOC suitable for modular backplane and hot-plug applications.
Can the CY74FCT2541CTSOC replace the CY74FCT541T in existing designs?
Yes, the CY74FCT2541CTSOC is functionally and pinout-compatible with the CY74FCT541T and is explicitly positioned as a noise-reduced upgrade. Its integrated 25-Ω output resistors and edge-rate control improve signal integrity without requiring PCB modifications. The CY74FCT2541CTSOC maintains identical logic behavior, timing interface, and DC specifications - enabling direct substitution to resolve reflection-related timing failures in legacy designs using the CY74FCT541T.
What is the purpose of the dual enable inputs (OEA and OEB) on the CY74FCT2541CTSOC?
The CY74FCT2541CTSOC features two independent active-low 3-state enable inputs (OEA and OEB) to provide flexible bus segmentation. Both must be low to activate all eight outputs; either can be held high to place its associated group (e.g., D0–D3/O0–O3 for OEA, D4–D7/O4–O7 for OEB) into high-impedance state. This architecture reduces external logic complexity in multi-master bus systems and is confirmed in the device's FUNCTION TABLE and logic diagram - a key differentiator from single-enable alternatives.
Is the CY74FCT2541CTSOC RoHS compliant and what is its moisture sensitivity level?
Yes, the CY74FCT2541CTSOC is RoHS compliant with NIPDAU lead finish and carries an MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH), per TI's official packaging documentation. This means no bake preconditioning is required prior to reflow soldering, simplifying manufacturing for high-reliability industrial assemblies. The CY74FCT2541CTSOC's SOIC (DW) package meets JEDEC MS-013 standards and is qualified for lead-free reflow profiles up to 260°C peak temperature.
CY74FCT2541CTSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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
CY74FCT2541CTSOC FAQ
1.How can I place an order for CY74FCT2541CTSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2541CTSOC 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 CY74FCT2541CTSOC reliable?
The price and inventory of CY74FCT2541CTSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2541CTSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT2541CTSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2541CTSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2541CTSOC?
CY74FCT2541CTSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2541CTSOC 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 CY74FCT2541CTSOC?
For technical support, including CY74FCT2541CTSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2541CTSOC requirements.
6.How does Aetrix verify that CY74FCT2541CTSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT2541CTSOC 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 CY74FCT2541CTSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT2541CTSOC?
All CY74FCT2541CTSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2541CTSOC, 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 CY74FCT2541CTSOC part is unused and in its original packaging.
Return procedure for CY74FCT2541CTSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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