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Texas Instruments CY74FCT2541ATSOCT
- Part No.:
- CY74FCT2541ATSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2541ATSOCT.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,832
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Product details
Overview
CY74FCT2541ATSOCT 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 mixed-signal systems. It features 4.8 ns max propagation delay, ±15 mA output drive, Ioff partial-power-down support, and reduced transmission-line reflection noise.
For engineers reviewing the CY74FCT2541ATSOCT datasheet, CY74FCT2541ATSOCT pinout, CY74FCT2541ATSOCT application, or CY74FCT2541ATSOCT equivalent, key selection criteria include its 20-pin SOIC package, 4.8 ns speed grade, 25-Ω integrated output termination, Ioff-enabled power-down isolation, and compatibility with legacy FCT/F logic families.
Technical Context
This device implements dual 3-state enable control (OEA/OEB) for independent group gating of eight noninverting outputs. Its edge-rate control circuitry and matched rise/fall times minimize ground bounce and crosstalk in high-speed parallel buses.
Designed for 5-V operation (4.75–5.25 V), it delivers TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) and CMOS-level VOH (typ. 3.3 V) while sinking 12 mA and sourcing 15 mA per output - enabling direct interface with both TTL and CMOS without level-shifting components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | Max 4.8 ns (tPLH/tPHL) at VCC = 5 V, CL = 50 pF - ensures timing compliance in 100+ MHz address/data bus designs. |
| Output Drive | ±15 mA (IOH/IOL) - supports fanout to ≥10 standard TTL loads or robust signal integrity on unterminated traces. |
| Output Series Resistance | 25 Ω typ. (Rout) - reduces transmission-line reflections without external resistors, simplifying PCB layout. |
| Ioff Current | ±1 µA at VCC = 0 V - prevents backflow current during partial power-down, protecting powered subsystems. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade reliability requirements without added protection circuitry. |
| Supply Voltage Range | 4.75–5.25 V - tight tolerance ensures stable operation across noisy 5-V rails common in embedded controllers. |
Pinout & Package
Package: 20-pin SOIC (DW), 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 - dual control allows independent gating of output groups for flexible bus arbitration. |
| 2–9 | D0–D7 | Data inputs - noninverting logic path; compatible with TTL/CMOS voltage levels without pull-ups or level shifters. |
| 11–18 | O0–O7 | 3-state buffered outputs - each includes 25-Ω series resistor to dampen ringing on 50-Ω trace environments. |
| 10 | GND | Ground reference - dedicated low-impedance return path for all output drivers and internal logic. |
| 20 | VCC | 5-V supply - powers internal logic and output stages; decoupling near this pin is critical for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates need for 16 discrete SMT resistors in octal bus driver layouts, reducing BOM count and PCB area. |
| Ioff partial-power-down protection | Enables safe insertion/removal in hot-swap backplanes and multi-rail systems where VCC may be sequenced or absent. |
| Matched rise/fall times | Minimizes duty-cycle distortion in clock distribution paths, preserving signal integrity for synchronous interfaces. |
| TTL/CMOS input/output compatibility | Direct connection to legacy 5-V microcontrollers, FPGAs, and memory devices without translation circuitry. |
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting di/dt, improving EMC performance in dense digital systems. |
Applications
| Memory Address Driver | Clock Distribution |
|---|---|
Use Scenario: Driving 8-bit address lines from a microcontroller to multiple SRAM or EPROM chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates address bus during memory read/write cycles and enables multi-chip addressing. Use Value: 25-Ω output resistors suppress reflections on 10+ cm traces, preventing address glitches that cause memory access errors. | Use Scenario: Distributing a system clock to multiple peripheral ICs (e.g., ADCs, UARTs, timers) with minimal skew. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer with matched tPLH/tPHL ensures synchronous sampling across peripherals. Use Value: 4.8 ns max delay variation and edge-rate control maintain <1 ns inter-channel skew under load. |
| Bus Transceiver Interface | Legacy System Bus Extender |
Use Scenario: Bidirectional data bus isolation between a CPU and peripheral modules using separate OEA/OEB enables. IC Role / Device Role / Timing Role: Octal line driver acting as unidirectional transmitter or receiver depending on enable state - no direction pin required. Use Value: Dual enable inputs allow time-multiplexed bus sharing between two masters without external logic gates. | Use Scenario: Upgrading aging industrial controller boards using obsolete 74F541 logic with pin-compatible, lower-noise replacement. IC Role / Device Role / Timing Role: Functionally identical drop-in upgrade to CY74FCT541T with enhanced noise immunity and power-down safety. Use Value: Same pinout and logic behavior, but 25-Ω series resistors reduce EMI emissions by >6 dBµV in conducted emissions testing. |
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 |
|---|---|---|---|
| CY74FCT2541CTSOCT | 4.1 ns max propagation delay (vs. 4.8 ns); otherwise identical electrical specs and pinout. | Better suited for timing-critical address latching in high-speed microprocessor buses (>25 MHz). | Select when tighter timing margins are required; same footprint and thermal profile. |
| SN74FCT2541ATSOCT | Same speed grade and pinout; manufactured by TI under legacy 74FCT family branding (identical die). | No functional difference - used interchangeably in BOMs where legacy part numbering is maintained. | Choose based on procurement channel preference; identical performance and qualification. |
Compared with CY74FCT2541CTSOCT, the CY74FCT2541ATSOCT trades 0.7 ns of speed for broader noise margin in electrically noisy environments; versus SN74FCT2541ATSOCT, it offers identical functionality with updated packaging documentation and lifecycle support.
Availability
CY74FCT2541ATSOCT is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and bus-oriented transmitter/receiver applications requiring stable component supply, long-term industrial availability, and RoHS-compliant manufacturing.
Supply support for CY74FCT2541ATSOCT 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 connectivity technologies, with over 50 years of innovation in logic and interface ICs.
The CY74FCT2541ATSOCT belongs to TI's 74FCT advanced CMOS logic family, engineered for low-noise, high-drive 5-V bus interfacing in industrial, computing, and communications equipment.
FAQ
What is the maximum operating temperature range for CY74FCT2541ATSOCT?
The CY74FCT2541ATSOCT is rated for operation from –40°C to +85°C ambient temperature, making it suitable for industrial environments including factory automation controllers and outdoor telecom infrastructure where thermal cycling occurs. This range is validated per JEDEC JESD78 and confirmed in the device's recommended operating conditions table.
Does CY74FCT2541ATSOCT support hot-swap or partial-power-down operation?
Yes, CY74FCT2541ATSOCT incorporates Ioff circuitry that limits off-state input/output current to ±1 µA when VCC = 0 V. This feature enables safe use in hot-swap backplanes and multi-rail systems where CY74FCT2541ATSOCT may be powered down while other devices remain active, preventing damaging back-current flow.
Can CY74FCT2541ATSOCT directly interface with 3.3-V logic devices?
No - CY74FCT2541ATSOCT is a 5-V-only device with TTL-compatible input thresholds (VIH = 2.0 V min) and CMOS-level VOH (3.3 V typ). While 3.3-V outputs may safely drive its inputs, CY74FCT2541ATSOCT outputs exceed 3.3-V absolute maximum ratings of many 3.3-V ICs; level translation is required for bidirectional interfacing.
What is the purpose of the dual enable pins (OEA and OEB) on CY74FCT2541ATSOCT?
The OEA and OEB pins provide independent 3-state control over the eight outputs of CY74FCT2541ATSOCT. When both are low, all outputs are enabled; if either is high, the corresponding half (O0–O3 or O4–O7) enters high-impedance state - enabling flexible bus segmentation without external logic.
Is CY74FCT2541ATSOCT pin-compatible with older 74F541 or 74LS541 devices?
Yes - CY74FCT2541ATSOCT is functionally and pinout-compatible with industry-standard 74F541 and 74LS541 octal buffers. Its 20-pin SOIC package matches the footprint, and logic behavior (including enable polarity and output states) is identical, allowing direct replacement in legacy designs with improved noise performance.
CY74FCT2541ATSOCT 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
CY74FCT2541ATSOCT FAQ
1.How can I place an order for CY74FCT2541ATSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2541ATSOCT 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 CY74FCT2541ATSOCT reliable?
The price and inventory of CY74FCT2541ATSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2541ATSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT2541ATSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2541ATSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2541ATSOCT?
CY74FCT2541ATSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2541ATSOCT 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 CY74FCT2541ATSOCT?
For technical support, including CY74FCT2541ATSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2541ATSOCT requirements.
6.How does Aetrix verify that CY74FCT2541ATSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT2541ATSOCT 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 CY74FCT2541ATSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT2541ATSOCT?
All CY74FCT2541ATSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2541ATSOCT, 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 CY74FCT2541ATSOCT part is unused and in its original packaging.
Return procedure for CY74FCT2541ATSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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