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Texas Instruments CY74FCT541ATPC
- Part No.:
- CY74FCT541ATPC
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CY74FCT541ATPC.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:705
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Product details
Overview
CY74FCT541ATPC from Texas Instruments is an 8-bit noninverting buffer/line driver with 3-state outputs, designed for memory address and clock distribution in TTL- and CMOS-compatible bus systems. It delivers 64-mA sink and 32-mA source drive capability, 4.8-ns max propagation delay (tPLH/tPHL), and operates across –40°C to +85°C with 4.75–5.25-V supply. Used in industrial control backplanes and legacy data acquisition interfaces.
For engineers reviewing the CY74FCT541ATPC datasheet, CY74FCT541ATPC pinout, CY74FCT541ATPC application, or CY74FCT541ATPC equivalent, key selection factors include its PDIP-20 package, Ioff-enabled partial-power-down support, edge-rate controlled noise performance, and compatibility with FCT/F logic families without level-shifting components.
Technical Context
This device implements dual 3-state output enables (OEA and OEB) controlling eight independent noninverting channels. Its Ioff circuitry actively disables outputs and limits reverse current when VCC = 0 V, enabling safe hot-insertion and mixed-voltage system partitioning.
Edge-rate control circuitry ensures matched rise/fall times (typical 3.3 V VOH, 0.55 V VOL at full load), reducing simultaneous switching noise. Input thresholds (VIH = 2 V min, VIL = 0.8 V max) and output levels are fully TTL-compatible, allowing direct interfacing with 5-V bipolar, NMOS, and CMOS logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - Ensures stable operation within industrial 5-V rail tolerances without external regulation. |
| Propagation Delay | ≤4.8 ns (tPLH/tPHL) - Supports high-speed bus timing up to ~200 MHz in short-trace applications. |
| Output Drive | 64 mA sink / 32 mA source - Drives heavy capacitive loads (e.g., >10 TTL units) without external buffers. |
| Ioff Current | ±1 µA at VCC = 0 V - Prevents backflow damage during partial power-down or board hot-swap sequences. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets MIL-STD-883 Class 3B requirements for ruggedized environments. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial temperature range without derating. |
| Input Capacitance | 5–10 pF - Minimizes loading on upstream drivers and preserves signal integrity on dense PCB traces. |
Pinout & Package
Package: 20-pin Plastic Dual In-line Package (PDIP-N), through-hole mount, RoHS-compliant NiPdAu lead finish, MSL-unrated (non-reflowable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEA) | Output Enable A | Active-low enable for D0–D3 → O0–O3; controls first half of 8-bit channel group. |
| 2–9 (D0–D7) | Data Inputs | Noninverting inputs driving corresponding outputs; TTL/CMOS compatible thresholds. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and internal logic; requires low-impedance PCB connection. |
| 11 (VCC) | Power Supply | 5-V nominal supply; bypass capacitor (0.1 µF) recommended adjacent to pin. |
| 12 (OEB) | Output Enable B | Active-low enable for D4–D7 → O4–O7; enables second half independently of OEA. |
| 13–20 (O0–O7) | 3-State Outputs | High-drive buffered outputs; enter high-impedance state when OEA and/or OEB = high. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Reduces simultaneous switching noise (SSN) by limiting di/dt without sacrificing speed-critical for EMI-sensitive instrumentation. |
| Ioff Partial-Power-Down Support | Enables safe isolation of powered-down subsystems in multi-rail systems; prevents latch-up or bus contention during sequencing. |
| FCT/F Logic Compatibility | Pin- and function-compatible with industry-standard 74FCT541 and 74F541 families-enables drop-in replacement in legacy designs. |
| TTL-Level Input/Output Interface | Eliminates need for level translators when interfacing with 5-V microcontrollers, FPGA I/O banks, or discrete logic arrays. |
| Matched Rise/Fall Times | Minimizes duty-cycle distortion on clock or strobe signals distributed across multiple loads. |
Applications
| Industrial Backplane Bus Driver | Legacy Memory Address Buffer |
|---|---|
|
Use Scenario: Driving parallel address/data buses across 12-inch PCB backplanes in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address lines from multiple peripheral decoders. Use Value: 64-mA sink current maintains signal integrity over long traces; Ioff prevents backfeed during module hot-swap maintenance. |
Use Scenario: Expanding 16-bit address space in 1980s-era microprocessor-based data loggers using 62256 SRAM. IC Role / Device Role / Timing Role: Address line repeater between Z80 CPU and memory bank select logic. Use Value: 4.8-ns propagation delay meets tight setup/hold windows; TTL-compatible inputs accept unbuffered CPU outputs directly. |
| Test Equipment Clock Distribution | Automated Test System (ATE) Signal Fanout |
|
Use Scenario: Distributing 10-MHz system clock to 8 independent measurement channels in benchtop DMMs. IC Role / Device Role / Timing Role: Low-skew clock buffer with independent enable control per channel group. Use Value: Matched rise/fall times preserve 50% duty cycle; edge-rate control suppresses ground bounce affecting ADC reference stability. |
Use Scenario: Fanout of digital stimulus signals from ATE controller to 8 DUT sites on a burn-in board. IC Role / Device Role / Timing Role: 3-state-controlled signal repeater enabling per-site test sequencing. Use Value: Dual OE pins allow staggered activation to reduce peak supply current; 32-mA source drive sustains logic-high levels under capacitive loading. |
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 |
|---|---|---|---|
| SN74FCT541ATPC | Same PDIP-20 package, identical pinout, but rated for –40°C to +85°C with 4.8-ns max tPLH; TI's direct rebranding of CY74FCT541ATPC. | No functional difference; used interchangeably in new designs where TI branding is preferred. | Select SN74FCT541ATPC when sourcing exclusively from TI-distributed channels or requiring TI-specific traceability. |
| 74AC541PC | Higher speed (3.5-ns typical tPLH) but lower drive (24-mA sink), no Ioff, and AC logic thresholds (VIH = 3.15 V min). | Suitable only in fully 5-V AC-systems with light loading; cannot replace CY74FCT541ATPC in partial-power-down or TTL-interfaced systems. | Choose 74AC541PC only if speed is critical and Ioff, noise control, and TTL compatibility are not required. |
Compared with SN74FCT541ATPC, CY74FCT541ATPC offers identical electrical and mechanical behavior; versus 74AC541PC, it trades raw speed for robustness in mixed-logic, hot-swap, and noise-sensitive industrial deployments.
Availability
CY74FCT541ATPC is available at Aetrix Electronics and suitable for industrial backplane bus drivers, legacy memory address buffering, and automated test equipment signal fanout requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT541ATPC 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 industrial-grade logic families.
CY74FCT541ATPC belongs to the 74FCT advanced CMOS logic series, engineered for high-speed, low-noise, TTL-compatible interface applications in mission-critical industrial and test equipment.
FAQ
What is the maximum operating frequency supported by CY74FCT541ATPC?
CY74FCT541ATPC does not specify a maximum clock frequency, but its 4.8-ns maximum propagation delay supports reliable operation up to approximately 200 MHz in point-to-point configurations with controlled impedance and minimal trace capacitance. Actual usable frequency depends on load, layout, and signal integrity margins-not a hard-rated clock input.
Does CY74FCT541ATPC support hot-swap or partial-power-down operation?
Yes, CY74FCT541ATPC includes Ioff circuitry that limits reverse current to ±1 µA when VCC = 0 V, enabling safe insertion/removal in live backplanes and interoperability with unpowered downstream logic. This feature is explicitly validated per JESD78 and documented in the absolute maximum ratings table.
Can CY74FCT541ATPC drive standard TTL loads directly?
Yes, CY74FCT541ATPC provides 64-mA sink and 32-mA source current, exceeding standard TTL unit load requirements (1.6 mA sink / 0.4 mA source). Its VOH (≥2.4 V at –32 mA) and VOL (≤0.55 V at 64 mA) meet TTL output specifications, and VIH/VIL thresholds match TTL input levels-no external components needed.
What is the purpose of the two output enable pins (OEA and OEB) on CY74FCT541ATPC?
OEA controls outputs O0–O3, and OEB controls O4–O7-allowing independent 4-bit group enable/disable. This enables flexible bus segmentation, staggered activation to limit inrush current, or selective isolation of subsystems without disabling the entire 8-bit path, improving system-level power management.
Is CY74FCT541ATPC pin-compatible with older 74LS541 or 74F541 devices?
CY74FCT541ATPC shares identical pinout and logic function with 74F541 and 74ACT541, but differs from 74LS541 in drive strength, speed, and input thresholds. While physically pin-compatible, direct substitution requires verification of VIH/VIL margins and sink/source capability-especially in LS-driven systems where input leakage may affect noise immunity.
CY74FCT541ATPC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CY74FCT541ATPC FAQ
1.How can I place an order for CY74FCT541ATPC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT541ATPC 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 CY74FCT541ATPC reliable?
The price and inventory of CY74FCT541ATPC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT541ATPC is usually 5 days.
3.What payment methods are accepted for CY74FCT541ATPC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT541ATPC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT541ATPC?
CY74FCT541ATPC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT541ATPC 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 CY74FCT541ATPC?
For technical support, including CY74FCT541ATPC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT541ATPC requirements.
6.How does Aetrix verify that CY74FCT541ATPC is sourced from the original manufacturer or authorized distributors?
All CY74FCT541ATPC 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 CY74FCT541ATPC meets industry standards.
7.What is the process for return or replacement of CY74FCT541ATPC?
All CY74FCT541ATPC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT541ATPC, 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 CY74FCT541ATPC part is unused and in its original packaging.
Return procedure for CY74FCT541ATPC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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