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Texas Instruments CY74FCT541ATSOCT
- Part No.:
- CY74FCT541ATSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT541ATSOCT.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:198
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Product details
Overview
CY74FCT541ATSOCT from Texas Instruments is an 8-bit noninverting buffer/line driver with 3-state outputs, designed for memory address and clock distribution, bus interfacing, and TTL/CMOS level translation. It delivers 64-mA sink and 32-mA source drive at 5-V operation, features Ioff partial-power-down support, edge-rate control for noise reduction, and operates from –40°C to 85°C.
For engineers reviewing the CY74FCT541ATSOCT datasheet, CY74FCT541ATSOCT pinout, CY74FCT541ATSOCT application, or CY74FCT541ATSOCT equivalent, key selection criteria include 3-state bus driving capability, TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V), low propagation delay (tPLH/tPHL ≤ 4.8 ns), Ioff-enabled system power sequencing, and SOIC-20 packaging for industrial PCB layouts.
Technical Context
This device implements dual 3-state output enables (OEA and OEB) controlling all eight channels simultaneously, enabling flexible bus arbitration in multi-driver systems. Its FCT-family architecture ensures function, pinout, and drive compatibility with industry-standard FCT and F logic families.
Edge-rate control circuitry actively limits slew rate to suppress simultaneous switching noise, while matched rise/fall times (typical 3.3 ns) ensure clean signal integrity. The Ioff feature disables outputs and limits leakage to ±1 µA when VCC = 0 V, supporting hot-insertion and partial-power-down modes without backflow current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - Ensures stable operation across industrial 5-V rail tolerances. |
| Output Drive | 64 mA sink / 32 mA source - Drives heavy capacitive loads and multiple TTL inputs without external buffers. |
| Propagation Delay | ≤ 4.8 ns (max) - Supports high-speed data paths up to ~200 MHz clock domains. |
| Ioff Leakage | ±1 µA at VCC = 0 V - Prevents damaging backfeed current during power sequencing or hot-swap events. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Guarantees reliable interfacing with standard TTL, NMOS, and CMOS logic families. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets JEDEC JESD22-A114/A115/C101 for robust board-level handling. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial ambient conditions without derating. |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, 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 to activate all eight outputs; independent control not supported. |
| 2–9 | D0–D7 | Data inputs - Noninverting logic path; direct connection to upstream logic or microcontroller GPIO. |
| 11–18 | O0–O7 | 3-state buffered outputs - High-impedance state asserted when either OEA or OEB is high. |
| 10 | GND | Ground reference - Must be low-inductance connection to minimize ground bounce in high-speed switching. |
| 20 | VCC | Power supply - Bypass with 0.1 µF ceramic capacitor near pin to suppress supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting dv/dt, improving signal integrity on shared buses. |
| Ioff partial-power-down | Enables safe operation during system power sequencing; prevents back-current flow when VCC is off. |
| TTL/CMOS input compatibility | Accepts standard TTL logic levels (0.8 V/2.0 V thresholds) without level-shifting components. |
| Matched rise/fall times | Ensures symmetrical waveform edges (typ. 3.3 ns), minimizing duty-cycle distortion in clock distribution. |
| High noise immunity | Input hysteresis (Vhys = 0.2 V) rejects transient noise on control and data lines. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
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 buffer isolating MCU outputs from bus capacitance and fanout load. Use Value: Enables reliable 8-bit parallel addressing at >10 MHz with 64-mA drive margin and <4.8 ns delay. | Use Scenario: Distributing a system clock to multiple peripheral ICs (e.g., ADCs, DACs, UARTs) on a mixed-signal PCB. IC Role / Device Role / Timing Role: Low-skew, 3-state-capable clock driver supporting dynamic enable/disable per subsystem. Use Value: Maintains tight skew (<0.5 ns between channels) and eliminates clock contention via OEA/OEB control. |
| Industrial Bus Transceiver Interface | TTL-to-CMOS Logic Translation |
Use Scenario: Bidirectional data transfer between legacy TTL-based instrumentation and modern CMOS controllers. IC Role / Device Role / Timing Role: Unidirectional line driver enabling controlled data flow onto a shared 8-bit data bus. Use Value: Provides 32-mA source/64-mA sink drive to overcome bus termination losses and meet TTL VOH/VOL specs. | Use Scenario: Interfacing 5-V TTL outputs (e.g., legacy FPGA I/O) to 5-V CMOS inputs requiring tighter VIH/VIL margins. IC Role / Device Role / Timing Role: Level translator preserving logic polarity while ensuring noise-immune thresholds. Use Value: Eliminates need for external resistors or discrete translators via native TTL-compatible input structure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT541ATSOCT | Same pinout, identical electrical specs, TI second-source marking - fully interchangeable. | No functional or layout impact; identical thermal and timing behavior. | Select when sourcing flexibility or dual-sourcing strategy is required. |
| 74AC541SCX | Higher speed (tPD ≤ 3.5 ns), lower drive (24 mA sink), no Ioff - lacks partial-power-down protection. | Suitable for high-frequency digital logic but unsuitable for hot-swap or power-gated systems. | Choose only if Ioff is unnecessary and sub-4 ns delay is critical; verify bus contention handling. |
Compared with SN74FCT541ATSOCT, CY74FCT541ATSOCT offers identical performance and drop-in compatibility; versus 74AC541SCX, it trades raw speed for robust Ioff protection and higher drive strength-critical for industrial bus reliability.
Availability
CY74FCT541ATSOCT is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial bus transceiver interfaces requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for CY74FCT541ATSOCT 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 CY74FCT541ATSOCT belongs to TI's FCT logic family, engineered for high-speed, low-noise, 3-state bus interface applications in industrial control, test equipment, and legacy system upgrades where TTL compatibility and power sequencing safety are essential.
FAQ
What is the maximum operating temperature range for CY74FCT541ATSOCT?
CY74FCT541ATSOCT is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in factory automation, motor drives, and outdoor electronics without thermal derating. The SOIC-20 package has a θJA of 58°C/W, supporting continuous operation under typical PCB copper pour conditions.
Does CY74FCT541ATSOCT support partial-power-down mode?
Yes, CY74FCT541ATSOCT supports partial-power-down mode via its Ioff circuitry. When VCC = 0 V, output leakage is limited to ±1 µA even with input/output voltages up to 4.5 V, preventing damaging back-current flow. This enables safe hot-plug operation and staged power sequencing in modular systems without external isolation components.
What are the absolute maximum ratings for CY74FCT541ATSOCT supply voltage and IOH/IOL?
CY74FCT541ATSOCT has an absolute maximum supply voltage of –0.5 V to 7 V. Its absolute maximum output current is ±120 mA per pin (short-circuit condition), though recommended operating IOL is 64 mA and IOH is –32 mA. Exceeding recommended values risks parametric shift or permanent damage; sustained short-circuit testing must follow TI's IOS guidelines (≤1 second, one output at a time).
How does the edge-rate control in CY74FCT541ATSOCT improve noise characteristics?
CY74FCT541ATSOCT incorporates internal edge-rate control that limits output slew rate, reducing di/dt-induced crosstalk and ground bounce. This significantly improves noise immunity in dense PCB layouts with shared power/ground planes and adjacent high-speed traces-verified by measured reductions in simultaneous switching noise (SSN) versus standard F logic equivalents.
Is CY74FCT541ATSOCT pin-compatible with older 74F541 or 74LS541 devices?
CY74FCT541ATSOCT uses the same SOIC-20 pinout as 74F541 and 74LS541, but differs electrically: it requires 5-V supply only (not 4.75–5.25 V like LS), has TTL-compatible inputs (VIL = 0.8 V, VIH = 2.0 V), and provides 3-state control via dual enables (OEA/OEB). Direct replacement is feasible only if system timing and power constraints align with FCT specifications.
CY74FCT541ATSOCT 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CY74FCT541ATSOCT FAQ
1.How can I place an order for CY74FCT541ATSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT541ATSOCT 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 CY74FCT541ATSOCT reliable?
The price and inventory of CY74FCT541ATSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT541ATSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT541ATSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT541ATSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT541ATSOCT?
CY74FCT541ATSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT541ATSOCT 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 CY74FCT541ATSOCT?
For technical support, including CY74FCT541ATSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT541ATSOCT requirements.
6.How does Aetrix verify that CY74FCT541ATSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT541ATSOCT 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 CY74FCT541ATSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT541ATSOCT?
All CY74FCT541ATSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT541ATSOCT, 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 CY74FCT541ATSOCT part is unused and in its original packaging.
Return procedure for CY74FCT541ATSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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