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Texas Instruments CY74FCT2541TSOCT
- Part No.:
- CY74FCT2541TSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2541TSOCT.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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Product details
Overview
CY74FCT2541TSOCT 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-transceiver applications in 5-V TTL/CMOS systems. It features Ioff support for partial-power-down mode, 4.8 ns typical propagation delay (tPLH/tPHL), 12 mA sink / 15 mA source drive strength, and ESD protection exceeding JESD22-A114A (2000 V HBM).
For engineers reviewing the CY74FCT2541TSOCT datasheet, CY74FCT2541TSOCT pinout, CY74FCT2541TSOCT application, or CY74FCT2541TSOCT equivalent, this page delivers verified functional identity, SOIC-20 package mapping, noise-reduction edge-rate control architecture, and validated alternatives for bus interface upgrades requiring reduced transmission-line reflections and Ioff-enabled system power sequencing.
Technical Context
The CY74FCT2541TSOCT implements dual active-low 3-state enable inputs (OEA and OEB) controlling eight noninverting buffered outputs, enabling independent channel gating in shared-bus topologies. Its integrated 25-Ω series output resistors suppress signal reflections without external termination components.
Edge-rate control circuitry ensures matched rise/fall times and significantly improved noise immunity versus standard FCT logic. The Ioff feature disables outputs and blocks current backflow when VCC = 0 V, supporting hot-insertion and partial-power-down operation in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation delay | 4.8 ns max (tPLH/tPHL at VCC = 5 V, CL = 50 pF) - enables high-speed address/data bus timing in legacy 5-V systems. |
| Output drive | 12 mA sink / 15 mA source - sufficient to drive multiple TTL loads or terminated transmission lines without buffering. |
| Output series resistance | 25 Ω typ - reduces ringing and overshoot on PCB traces up to ~15 cm, eliminating need for discrete series resistors. |
| Ioff leakage | ±1 µA at VCC = 0 V - prevents damaging back-current during power sequencing or hot-swap events. |
| ESD rating | 2000 V HBM - exceeds JEDEC JESD22-A114A, supporting robust handling in manufacturing and field environments. |
| VOH/VOL | 3.3 V min / 0.55 V max at IO = –15 mA / 12 mA - ensures TTL-compatible logic levels across full temperature range (–40°C to 85°C). |
| Supply voltage | 4.75 V to 5.25 V - tight regulation tolerance maintains stable timing and noise margins in noisy industrial power rails. |
Pinout & Package
SOIC-20 package (DW suffix), 7.5 mm × 12.8 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, 20 | OEA, OEB, VCC | OEA and OEB are active-low 3-state enables; VCC powers all logic and output stages (4.75–5.25 V). |
| 2–9 | D0–D7 | Eight data inputs - directly accept TTL/CMOS logic levels; no level-shifting required. |
| 11–18 | O0–O7 | Eight noninverting 3-state outputs with integrated 25-Ω series resistors - drive buses or clocks with controlled edge rates. |
| 10 | GND | Ground reference for all input thresholds, output switching, and thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Reduces transmission-line reflection noise without adding external components or PCB area. |
| Ioff partial-power-down protection | Prevents reverse current flow when VCC is off, enabling safe power sequencing in multi-rail systems. |
| Matched rise/fall times | Minimizes duty-cycle distortion on clock signals and improves signal integrity on bidirectional buses. |
| TTL/CMOS input compatibility | Accepts standard 0.8 V / 2.0 V VIH/VIL thresholds - interoperable with legacy 5-V logic families without interface circuitry. |
| Edge-rate control circuitry | Delivers significantly improved noise characteristics versus standard FCT devices, critical for dense PCB layouts. |
Applications
| Memory Address Driver | System Clock Distribution |
|---|---|
Use Scenario: Driving 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 latches during bus contention; 25-Ω outputs dampen reflections on long traces. Use Value: Eliminates need for discrete series termination resistors while maintaining setup/hold timing margins under load. |
Use Scenario: Distributing a master system clock to multiple peripheral ICs (e.g., UARTs, timers, ADCs) across a 4-layer board. IC Role / Device Role / Timing Role: Low-skew, low-noise clock fanout buffer with matched edge rates ensures synchronous sampling across receivers. Use Value: Edge-rate control and 25-Ω series resistance reduce jitter accumulation and EMI emissions by >6 dB compared to standard buffers. |
| PCI Bus Transceiver Interface | Industrial Control Backplane Driver |
Use Scenario: Interfacing a PCI controller to legacy ISA-style expansion slots requiring 5-V tolerant, 3-state bus drivers. IC Role / Device Role / Timing Role: Octal line driver with dual enable pins supports direction control and slot-select isolation in multiplexed backplane architectures. Use Value: Ioff allows safe hot-plug insertion of cards while main system remains powered, preventing bus lockup or damage. |
Use Scenario: Driving isolated digital I/O lines from a PLC CPU module to remote terminal units over 1–2 m ribbon cables. IC Role / Device Role / Timing Role: Robust 12 mA sink capability handles capacitive loads up to 100 pF; ESD-hardened I/O withstands factory ESD events. Use Value: 2000 V HBM rating and 25-Ω damping ensure reliable operation in electrically noisy industrial environments without external TVS diodes. |
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 |
|---|---|---|---|
| CY74FCT2541ATSOCT | 4.8 ns max propagation delay (vs. 8 ns for CY74FCT2541TSOCT); identical pinout, Ioff, and 25-Ω output resistors. | Better timing margin for high-frequency address/data buses; same thermal profile and layout compatibility. | Select when tPD < 5 ns is required for setup/hold compliance in fast 5-V systems. |
| SN74FCT2541CTSOCT | 4.1 ns max propagation delay; otherwise identical electrical specs, package, and pinout. | Optimized for highest-speed FCT bus interfaces where sub-5 ns latency is critical. | Choose for maximum speed-critical applications; verify VCC tolerance (4.75–5.25 V) matches system rail stability. |
Compared with CY74FCT2541TSOCT, the CY74FCT2541ATSOCT offers 3.2 ns faster propagation while retaining identical noise suppression and power-down behavior, whereas the SN74FCT2541CTSOCT delivers the fastest timing (4.1 ns) in the family-both require no PCB changes and support drop-in replacement in SOIC-20 footprints.
Availability
CY74FCT2541TSOCT is available at Aetrix Electronics and suitable for memory address driving, clock distribution, and industrial backplane interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CY74FCT2541TSOCT 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, with decades of expertise in high-reliability industrial and automotive-grade components.
The CY74FCT2541TSOCT belongs to TI's FCT logic family, engineered for noise-immune 5-V bus interfacing in legacy and mixed-voltage systems where signal integrity, power sequencing, and long-term availability are critical.
FAQ
What is the maximum operating temperature range for the CY74FCT2541TSOCT?
The CY74FCT2541TSOCT is specified for operation from –40°C to +85°C ambient temperature. This range is validated per TI's recommended operating conditions and supported by thermal impedance data (58°C/W for SOIC package), making it suitable for industrial control cabinets and telecom infrastructure environments where ambient temperatures exceed consumer-grade limits.
Does the CY74FCT2541TSOCT support hot-swap or partial-power-down operation?
Yes, the CY74FCT2541TSOCT includes Ioff circuitry that disables outputs and limits leakage to ±1 µA when VCC = 0 V. This feature enables safe hot-insertion into live backplanes and coordinated power sequencing in multi-rail systems - a key requirement confirmed in the device's absolute maximum ratings and functional description.
How does the 25-Ω output series resistance in the CY74FCT2541TSOCT improve signal integrity?
The 25-Ω output series resistance in the CY74FCT2541TSOCT damps high-frequency reflections on PCB traces, reducing overshoot, undershoot, and ringing. Measured Rout = 20–40 Ω (typical 25 Ω) matches common FR-4 trace impedances (~50–75 Ω), lowering EMI and improving timing margins without requiring external resistors - directly confirmed in the electrical characteristics table.
Can the CY74FCT2541TSOCT interface directly with both TTL and CMOS logic families?
Yes, the CY74FCT2541TSOCT accepts TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and delivers CMOS-compatible output levels (VOH ≥ 2.4 V, VOL ≤ 0.55 V at rated load), enabling direct interconnection with 5-V TTL, LVTTL, and CMOS devices without level shifters or pull-up resistors - explicitly stated in the device description and recommended operating conditions.
What is the propagation delay specification for the CY74FCT2541TSOCT, and how is it measured?
The CY74FCT2541TSOCT has a maximum propagation delay of 8 ns (tPLH/tPHL) under standard test conditions: VCC = 5 V, CL = 50 pF, TA = 25°C. This value is measured from 1.5 V input transition to 1.5 V output transition per JEDEC standards, as documented in the switching characteristics table and Figure 1 load circuit.
CY74FCT2541TSOCT 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:
- 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
CY74FCT2541TSOCT FAQ
1.How can I place an order for CY74FCT2541TSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2541TSOCT 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 CY74FCT2541TSOCT reliable?
The price and inventory of CY74FCT2541TSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2541TSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT2541TSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2541TSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2541TSOCT?
CY74FCT2541TSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2541TSOCT 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 CY74FCT2541TSOCT?
For technical support, including CY74FCT2541TSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2541TSOCT requirements.
6.How does Aetrix verify that CY74FCT2541TSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT2541TSOCT 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 CY74FCT2541TSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT2541TSOCT?
All CY74FCT2541TSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2541TSOCT, 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 CY74FCT2541TSOCT part is unused and in its original packaging.
Return procedure for CY74FCT2541TSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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