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Texas Instruments CY74FCT541TSOC
- Part No.:
- CY74FCT541TSOC
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT541TSOC.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:666
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Product details
Overview
CY74FCT541TSOC from Texas Instruments is an 8-bit noninverting buffer/line driver with 3-state outputs, designed for bus-oriented data transmission in TTL- and CMOS-compatible systems. It delivers 64-mA sink and 32-mA source drive capability, 8 ns maximum propagation delay (tPLH/tPHL), and operates across –40°C to +85°C. It serves as a memory address driver or clock distribution buffer in industrial control backplanes.
For engineers reviewing the CY74FCT541TSOC datasheet, CY74FCT541TSOC pinout, CY74FCT541TSOC application, or CY74FCT541TSOC equivalent, key selection criteria include 3-state output control timing (tPZH = 10 ns max), Ioff-enabled partial-power-down support, edge-rate controlled noise immunity, and SOIC-20 package compatibility with legacy FCT logic families.
Technical Context
This device implements dual 3-state enable inputs (OEA and OEB) controlling all eight noninverting outputs simultaneously, supporting flexible bus arbitration and bidirectional data flow management. Its edge-rate control circuitry limits slew rate to reduce simultaneous switching noise, while matched rise/fall times (typ. 3.5 ns) ensure clean signal integrity under heavy capacitive loads.
The Ioff feature disables output leakage current when VCC = 0 V (±1 µA), enabling safe hot-insertion and system-level power sequencing. Input thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max), and output voltage levels (VOH = 2.4 V min at –32 mA, VOL = 0.55 V max at 64 mA) interface directly with 5-V CMOS, NMOS, and bipolar logic without level-shifting components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation within standard 5-V ±5% rail tolerance, avoiding undervoltage lockout or overvoltage stress. |
| Propagation Delay | 1.5 ns (min) to 8 ns (max) - enables reliable timing in high-speed address/data buses up to ~125 MHz clock-equivalent systems. |
| Output Drive | 64 mA sink / 32 mA source - supports driving 50-pF loads across 15-cm PCB traces or multiple TTL inputs without external buffers. |
| Ioff Current | ±1 µA at VCC = 0 V - prevents backflow current during partial power-down, protecting powered subsystems in modular chassis designs. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements for assembly handling and field deployment. |
| Operating Temperature | –40°C to +85°C - qualified for use in commercial and extended-temperature industrial environments including factory automation controllers. |
| Package | SOIC-20 (DW) - surface-mount, 0.300″ wide body, RoHS-compliant NIPDAU finish, MSL Level-1 unlimited reflow profile. |
Pinout & Package
CY74FCT541TSOC is housed in a 20-pin SOIC (DW) package with 0.300″ body width, 1.27 mm pitch, and standard JEDEC MO-001AC outline. Pin 1 is located at top-left corner (quadrant Q1) per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEA) | Output Enable A | Active-low enable for first group of four outputs (O0–O3); tied low to activate, high or floating to force high-impedance. |
| 2–9 (D0–D7) | Data Inputs | Noninverting input channels; accept TTL/CMOS logic levels directly; no external pull-ups required. |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output drivers; must be low-inductance connection to system ground plane. |
| 11 (VCC) | Power Supply | +5-V supply input; requires local 0.1-µF ceramic decoupling capacitor placed ≤5 mm from pin. |
| 12 (OEB) | Output Enable B | Active-low enable for second group of four outputs (O4–O7); independent control allows split-bus isolation. |
| 13–20 (O0–O7) | 3-State Outputs | Buffered noninverting outputs; enter high-Z state when OEA and/or OEB is high; drive strength asymmetric (64 mA sink > 32 mA source). |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Controlled slew rate reduces simultaneous switching noise (SSN), enabling cleaner signal integrity on dense PCBs with >20-mA load steps. |
| Ioff Partial-Power-Down Support | Outputs disable safely when VCC = 0 V, preventing reverse current flow into powered sections-critical for hot-swap backplane applications. |
| TTL-Compatible Input/Output Levels | Direct interface with legacy 5-V TTL, NMOS, and CMOS without level shifters or resistive biasing networks. |
| Matched Rise/Fall Times | Typical 3.5 ns both edges minimizes duty cycle distortion in clock distribution paths and avoids setup/hold violations in synchronous buses. |
| ESD Robustness | Exceeds JESD22-A114A (2000-V HBM), allowing safe handling during manual assembly and board-level testing without special ESD protocols. |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer isolating MCU address outputs from distributed capacitive load; 3-state control enables bus sharing with other masters. Use Value: 64-mA sink current maintains VIH margin across 100 pF total trace+input capacitance; 8 ns tPLH ensures <1% timing skew across all 8 bits. |
Use Scenario: Interfacing PLC CPU module to I/O expansion slots via standardized 50-pin DIN connector backplane. IC Role / Device Role / Timing Role: Bidirectional bus transceiver element enabling read/write arbitration between CPU and remote I/O cards. Use Value: Dual OE pins (OEA/OEB) allow independent gating of upper/lower byte lanes; Ioff prevents backfeed during hot-plug insertion of I/O modules. |
| Legacy System Clock Distribution | Test Equipment Signal Conditioning |
|
Use Scenario: Distributing 25-MHz system clock from FPGA to multiple ASICs and ADCs on a mixed-signal test board. IC Role / Device Role / Timing Role: Low-skew clock driver with controlled edge rates to minimize jitter accumulation and crosstalk-induced timing errors. Use Value: Matched rise/fall times (3.5 ns typ.) preserve 50% duty cycle; VOH/VOL specs guarantee >0.7 V noise margin at receiver inputs. |
Use Scenario: Conditioning digital stimulus signals from ATE pattern generator before applying to DUT's control interface. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer ensuring TTL-compatible logic levels reach DUT despite long cable runs and connector losses. Use Value: 32-mA source drive sustains logic high across 2-m cable + 50-Ω termination; edge-rate control suppresses radiated emissions above 30 MHz. |
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 |
|---|---|---|---|
| SN74FCT541CTSOC | Lower drive (48 mA sink / 12 mA source); 4.1 ns max tPLH; same SOIC-20 footprint. | Better suited for low-noise, low-power applications where full 64-mA drive is unnecessary. | Select when lower ICC and reduced SSN outweigh need for higher sink current. |
| 74ACT541SCX | Higher VOH (≥4.4 V), wider VCC range (4.5–5.5 V), but no Ioff or edge-rate control; SOIC-20 compatible. | Preferred in mixed-voltage systems requiring stronger high-level drive into high-impedance loads. | Choose only if Ioff and noise control are not required and higher VOH improves noise immunity. |
Compared with SN74FCT541CTSOC and 74ACT541SCX, CY74FCT541TSOC uniquely balances high sink drive, Ioff safety, and edge-rate noise suppression in a single SOIC-20 package-making it optimal for industrial backplanes and hot-pluggable modules where reliability under partial power-down is mandatory.
Availability
CY74FCT541TSOC is available at Aetrix Electronics and suitable for industrial control backplanes, test equipment signal conditioning, legacy system clock distribution, and memory address buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT541TSOC 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 heritage in high-reliability logic families including FCT, ACT, and LVC series.
CY74FCT541TSOC belongs to TI's military- and industrial-grade FCT logic family, engineered for robust 5-V bus interfacing with emphasis on noise immunity, power sequencing safety, and drop-in compatibility with legacy TTL and CMOS systems.
FAQ
What is the maximum operating temperature range for CY74FCT541TSOC?
CY74FCT541TSOC is rated for continuous operation from –40°C to +85°C ambient temperature. This range is validated per TI's production test conditions and supports deployment in industrial enclosures without forced air cooling, such as programmable logic controller (PLC) base units and motor drive control panels where ambient temperatures may exceed 70°C.
Does CY74FCT541TSOC support partial-power-down mode?
Yes, CY74FCT541TSOC supports partial-power-down mode via its Ioff feature. When VCC = 0 V, output leakage is limited to ±1 µA regardless of input/output voltage, preventing damaging back-current flow into powered sections of the system-enabling safe hot-swap operation in modular backplane architectures.
What is the propagation delay specification for CY74FCT541TSOC?
CY74FCT541TSOC has a propagation delay (tPLH/tPHL) of 1.5 ns minimum to 8 ns maximum over the full operating temperature and voltage range. This value is measured from input transition (50% point) to output transition (50% point) under 50-pF load conditions, making it suitable for sub-100 MHz synchronous bus timing budgets.
Can CY74FCT541TSOC drive standard TTL inputs directly?
Yes, CY74FCT541TSOC is fully compatible with TTL input and output logic levels. Its VOH (≥2.4 V at –32 mA) and VOL (≤0.55 V at 64 mA) meet or exceed TTL voltage thresholds, and its VIH (≥2.0 V) and VIL (≤0.8 V) accept standard TTL swing-enabling direct interconnection without level-shifting components.
What package type is used for CY74FCT541TSOC?
CY74FCT541TSOC uses a 20-pin SOIC (DW) package per JEDEC MS-013AA, with 0.300″ body width, 1.27 mm lead pitch, and RoHS-compliant NiPdAu (NIPDAU) lead finish. It is rated MSL Level-1 (unlimited floor life) and qualified for standard SnPb and Pb-free reflow profiles.
CY74FCT541TSOC 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:
- 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
CY74FCT541TSOC FAQ
1.How can I place an order for CY74FCT541TSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT541TSOC 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 CY74FCT541TSOC reliable?
The price and inventory of CY74FCT541TSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT541TSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT541TSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT541TSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT541TSOC?
CY74FCT541TSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT541TSOC 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 CY74FCT541TSOC?
For technical support, including CY74FCT541TSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT541TSOC requirements.
6.How does Aetrix verify that CY74FCT541TSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT541TSOC 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 CY74FCT541TSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT541TSOC?
All CY74FCT541TSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT541TSOC, 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 CY74FCT541TSOC part is unused and in its original packaging.
Return procedure for CY74FCT541TSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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