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Texas Instruments CY74FCT2541ATQCTE4
- Part No.:
- CY74FCT2541ATQCTE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CY74FCT2541ATQCTE4.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
CY74FCT2541ATQCTE4 from Texas Instruments is an octal noninverting 3-state 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 in 5-V TTL/CMOS systems. It features 4.8-ns max propagation delay, ±15-mA output drive, Ioff partial-power-down support, and JESD22-compliant ESD protection (2000-V HBM).
For engineers reviewing the CY74FCT2541ATQCTE4 datasheet, CY74FCT2541ATQCTE4 pinout, CY74FCT2541ATQCTE4 application, or CY74FCT2541ATQCTE4 equivalent, key selection criteria include its 4.8-ns speed grade, QSOP-20 package with 25-Ω integrated series termination, Ioff-enabled power-down isolation, and compatibility with legacy FCT/F logic designs.
Technical Context
This device implements dual 3-state enable controls (OEA and OEB) to independently manage eight noninverting buffered outputs, supporting flexible bus arbitration and bidirectional data flow. Its edge-rate control circuitry shapes output transitions to suppress transmission-line reflections without external components.
The integrated 25-Ω output series resistors are matched across all eight channels and operate across the full –40°C to 85°C industrial temperature range. Ioff functionality ensures high-impedance outputs when VCC = 0 V, preventing backflow current during partial power-down sequences in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPLH/tPHL) | Max 4.8 ns at VCC = 4.75–5.25 V - enables high-speed address/clock buffering in 5-V bus systems |
| Output Drive | 15 mA source / 12 mA sink - sufficient to drive 50-pF loads with TTL-compatible VOH/VOL levels |
| Supply Voltage Range | 4.75 V to 5.25 V - tightly regulated 5-V operation with 5% tolerance |
| Ioff Leakage | ±1 µA at VCC = 0 V, VOUT = 4.5 V - ensures safe isolation during hot-insertion or partial power-down |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 requirements for industrial environments |
| Output Series Resistance | 20–40 Ω (typ 25 Ω) - reduces signal overshoot/ringing on PCB traces up to 10 cm without discrete termination |
| Input Threshold Hysteresis | 0.2 V - improves noise immunity on noisy bus lines |
Pinout & Package
Package: SSOP-20 (DBQ), 0.65-mm pitch, 7.6 mm × 5.3 mm body, 2.65 mm max height, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEA) | Output Enable A | Active-low enable for outputs O0–O3; drives high-impedance state when high |
| 2–9 (D0–D7) | Data Inputs | Noninverting inputs accepting TTL/CMOS logic levels; VIH = 2 V min, VIL = 0.8 V max |
| 10 (GND) | Ground | Reference return for all signals and power; must be low-inductance connection |
| 11 (VCC) | Power Supply | 5-V supply input; requires local 0.1-µF ceramic decoupling adjacent to pin |
| 12 (OEB) | Output Enable B | Active-low enable for outputs O4–O7; independent control from OEA |
| 13–20 (O0–O7) | 3-State Outputs | Buffered noninverting outputs with 25-Ω series resistance; tri-state capable under OEA/OEB control |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω Output Series Resistors | Reduces PCB trace reflection noise without adding external components or layout area |
| Edge-Rate Control Circuitry | Slows output edge transitions to limit di/dt-induced crosstalk and EMI in dense routing |
| Ioff Partial-Power-Down Support | Prevents damaging backflow current when VCC is off but bus lines remain active |
| Matched Rise/Fall Times | Ensures symmetrical signal integrity for clock and strobe distribution |
| TTL/CMOS Input Compatibility | Accepts standard TTL VIH/VIL thresholds without level-shifting circuitry |
Applications
| Memory Address Driver | System Clock Distribution |
|---|---|
Use Scenario: Driving 20-bit address buses between microcontroller and SRAM/Flash in industrial controllers. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates CPU from memory during DMA cycles. Use Value: 4.8-ns propagation delay and 25-Ω output impedance minimize address skew and reflection-induced setup violations. | Use Scenario: Distributing a 25-MHz system clock to multiple peripherals (ADC, UART, GPIO) on a single-layer PCB. IC Role / Device Role / Timing Role: Low-skew clock driver with controlled edge rates to reduce jitter accumulation. Use Value: Matched rise/fall times and integrated series termination maintain signal integrity across 8-cm trace lengths. |
| Bus Transceiver Interface | Legacy Logic Migration Aid |
Use Scenario: Bidirectional data bus interface between FPGA and legacy 5-V peripheral ASIC with separate read/write enables. IC Role / Device Role / Timing Role: Octal buffer with dual OE pins (OEA/OEB) enables independent control of upper/lower nibbles. Use Value: Independent 3-state control per group allows time-multiplexed bus sharing without external logic. | Use Scenario: Upgrading obsolete 74F541 designs to lower-noise, pin-compatible replacements without board rework. IC Role / Device Role / Timing Role: Function- and pin-compatible drop-in replacement for CY74FCT541T with improved noise performance. Use Value: Same SOIC/QSOP footprint and logic behavior, but adds 25-Ω termination and edge-rate control for immediate EMI reduction. |
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 |
|---|---|---|---|
| CY74FCT2541CTQCT | 4.1-ns max propagation delay; otherwise identical electrical specs and pinout | Better timing margin for high-frequency address latching (≥33 MHz) | Select when propagation delay is critical and 4.1 ns enables tighter setup windows |
| SN74FCT2541ATPWR | TSSOP-20 package; same 4.8-ns speed grade and functional spec; TI's alternate marking | Same electrical behavior but different thermal resistance (JA = 66°C/W vs 68°C/W) | Choose for alternate sourcing or preferred TSSOP assembly process compatibility |
Compared with CY74FCT2541CTQCT, the CY74FCT2541ATQCTE4 trades 0.7 ns of speed for broader availability and identical noise-reduction features; versus SN74FCT2541ATPWR, it offers identical timing and drive strength in a functionally equivalent SSOP package with verified long-term industrial supply chain continuity.
Availability
CY74FCT2541ATQCTE4 is available at Aetrix Electronics and suitable for industrial control systems, embedded memory interfaces, and clock distribution networks requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for CY74FCT2541ATQCTE4 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 connectivity solutions for industrial, automotive, and communications markets.
The CY74FCT2541A belongs to TI's FCT logic family, engineered for noise-sensitive 5-V digital systems requiring TTL-compatible drive, low-skew buffering, and robust partial-power-down capability.
FAQ
What is the maximum operating temperature range for CY74FCT2541ATQCTE4?
The CY74FCT2541ATQCTE4 is rated for continuous operation from –40°C to +85°C ambient temperature, meeting industrial-grade environmental requirements. This range is validated across all electrical specifications including propagation delay, output drive, and Ioff leakage, and aligns with its SSOP-20 package's MSL Level-2 reflow profile.
Does CY74FCT2541ATQCTE4 support hot-swap or live-insertion scenarios?
Yes, CY74FCT2541ATQCTE4 supports partial-power-down operation via its Ioff feature: when VCC = 0 V, outputs enter high-impedance state with ±1 µA leakage, preventing current backflow from live bus lines into the unpowered device - a key requirement for hot-swap backplane and modular system designs.
How does the 25-Ω output series resistance in CY74FCT2541ATQCTE4 improve signal integrity?
The 25-Ω output series resistance in CY74FCT2541ATQCTE4 forms a source-termination network with typical PCB trace impedances (~50–75 Ω), reducing signal reflections that cause ringing, overshoot, and timing uncertainty. Measured Rout of 20–40 Ω (typ 25 Ω) is effective for trace lengths up to 10 cm without external resistors.
Can CY74FCT2541ATQCTE4 directly interface with 3.3-V CMOS logic inputs?
No - CY74FCT2541ATQCTE4 is a 5-V device with TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and VOH ≈ 3.3 V (min 2.4 V). While its VOH may meet some 3.3-V CMOS VIH requirements, it lacks guaranteed 3.3-V input compatibility; level-shifting or voltage translation is recommended for reliable 3.3-V interface.
What is the pin 1 identifier and orientation for CY74FCT2541ATQCTE4 in tape-and-reel packaging?
CY74FCT2541ATQCTE4 in SSOP-20 (DBQ) tape-and-reel uses quadrant Q1 pin 1 orientation: the sprocket holes and pocket geometry position pin 1 in the top-left corner of the cavity when viewed with the component face-up and feed direction toward the user, per TI's DBQ tape specification.
CY74FCT2541ATQCTE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SSOP
CY74FCT2541ATQCTE4 FAQ
1.How can I place an order for CY74FCT2541ATQCTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2541ATQCTE4 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 CY74FCT2541ATQCTE4 reliable?
The price and inventory of CY74FCT2541ATQCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2541ATQCTE4 is usually 5 days.
3.What payment methods are accepted for CY74FCT2541ATQCTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2541ATQCTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2541ATQCTE4?
CY74FCT2541ATQCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2541ATQCTE4 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 CY74FCT2541ATQCTE4?
For technical support, including CY74FCT2541ATQCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2541ATQCTE4 requirements.
6.How does Aetrix verify that CY74FCT2541ATQCTE4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT2541ATQCTE4 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 CY74FCT2541ATQCTE4 meets industry standards.
7.What is the process for return or replacement of CY74FCT2541ATQCTE4?
All CY74FCT2541ATQCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2541ATQCTE4, 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 CY74FCT2541ATQCTE4 part is unused and in its original packaging.
Return procedure for CY74FCT2541ATQCTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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