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Texas Instruments CD54ACT540F3A
- Part No.:
- CD54ACT540F3A
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
CD54ACT540F3A.pdf
- Description:
- CD54ACT540 INVERTING OCTAL BUFFE
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Inventory:3,487
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Product details
Overview
CD54ACT540F3A from Texas Instruments is an octal inverting 3-state buffer/line driver with dual active-LOW output enables, designed for high-speed digital bus interface and data routing in military-grade systems. It operates over –55°C to +125°C, supports 5-V supply, delivers ±50 mA output drive per pin, and features propagation delay of 6.5 ns (typ) at VCC = 5 V.
For engineers reviewing the CD54ACT540F3A datasheet, CD54ACT540F3A pinout, CD54ACT540F3A application, or CD54ACT540F3A equivalent, this device is selected for robust bus buffering in avionics, defense computing, and radiation-tolerant embedded control where wide temperature range, TTL-compatible inputs, and high noise immunity are required.
Technical Context
The CD54ACT540F3A implements advanced CMOS logic with TTL-compatible input thresholds and rail-to-rail output swing. Its dual OE\ pins enable independent control of two groups of four outputs, supporting bidirectional bus partitioning and hot-swap isolation in backplane architectures.
This device belongs to the ACT (Advanced CMOS TTL-compatible) family, offering improved speed-power trade-offs versus AC variants. It uses a standard 20-pin ceramic dual-in-line package (CDIP), rated for military temperature range and qualified under QML Class V requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT - TTL-compatible input thresholds, 5-V operation, higher speed than AC. |
| Function | Inverting octal 3-state buffer - eight independent inverters with tri-state outputs. |
| Output Enable | Dual active-LOW OE\ pins - OE1\ controls Y0–Y3; OE2\ controls Y4–Y7. |
| Propagation Delay | 6.5 ns (typ) at VCC = 5 V - enables synchronization in sub-100 MHz digital buses. |
| Output Drive | ±50 mA per output - sufficient to drive 50-Ω transmission lines or multiple TTL loads. |
| Operating Temperature | –55°C to +125°C - qualified for military and aerospace environments without derating. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of power supply ripple. |
Pinout & Package
CD54ACT540F3A is housed in a 20-pin ceramic dual-in-line package (CDIP, J package drawing), hermetically sealed and suitable for high-reliability applications requiring long-term stability and moisture resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Inputs A0–A7 | Active-HIGH TTL-compatible data inputs; inverted at corresponding outputs. |
| 9, 10 | OE1\, OE2\ | Active-LOW output enables - each controls four outputs independently. |
| 11, 12, 13, 14, 15, 16, 17, 18 | Outputs Y0–Y7 | Inverted buffered outputs; high-impedance when respective OE\ is HIGH. |
| 19 | GND | Ground reference for logic and power return path. |
| 20 | VCC | Positive supply terminal - must be decoupled locally for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| QML Class V qualification | Fully certified for military/aerospace use per MIL-PRF-38535, including screening and lot traceability. |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max - ensures interoperability with legacy 5-V TTL systems. |
| High noise immunity | Typical VNH = 0.4 V at VCC = 5 V - suppresses ground bounce and EMI in dense PCB layouts. |
| Low dynamic power | ICC = 4 µA max at 25°C - reduces standby current in always-on subsystems. |
| Bus-hold circuitry | Not present - requires external pull-up/down resistors on unused inputs to prevent floating states. |
Applications
| Avionics Data Bus Interface | Military Vehicle Control System |
|---|---|
|
Use Scenario: Isolating and buffering ARINC 429 or MIL-STD-1553B data lines between mission computers and sensor modules. IC Role / Device Role / Timing Role: Inverting 3-state buffer enabling time-multiplexed bidirectional data flow while preventing bus contention during mode switching. Use Value: Dual OE\ pins allow precise timing control of signal direction transitions, reducing setup/hold violations in deterministic real-time networks. |
Use Scenario: Driving multiplexed address/data buses in ruggedized vehicle ECUs operating across extreme ambient temperatures. IC Role / Device Role / Timing Role: Octal inverting buffer providing level translation and fanout expansion from microcontroller GPIOs to peripheral ASICs. Use Value: ±50 mA drive strength ensures reliable signal integrity over long traces in noisy engine-bay environments. |
| Secure Communications Module | Radiation-Hardened Test Equipment |
|
Use Scenario: Enabling/disabling cryptographic co-processor interfaces during secure boot and key loading sequences. IC Role / Device Role / Timing Role: 3-state gate controlling physical access to sensitive data paths; OE\ signals synchronized to security state machine. Use Value: Hermetic CDIP package prevents tampering and mitigates ionizing radiation effects on logic states. |
Use Scenario: Signal conditioning and routing in automated test equipment used for qualification of space-grade components. IC Role / Device Role / Timing Role: High-speed bus repeater ensuring signal fidelity across modular backplane interconnects. Use Value: 6.5 ns propagation delay enables sub-100 MHz clock domain bridging without added jitter or skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD54AC540F3A | AC family - slower (10 ns typ), lower drive (±24 mA), no TTL-compatible inputs. | Suitable only for non-TTL mixed-voltage systems with relaxed timing budgets. | Select only if lower power consumption outweighs speed and interface compatibility needs. |
| CD74ACT540E | Same ACT logic but plastic DIP (N package); commercial/military temp range (–55°C to +125°C), not QML-certified. | Lacks full QML Class V screening - acceptable for industrial prototypes but not flight hardware. | Choose for cost-sensitive development boards where hermeticity and lot traceability are not required. |
Compared with CD54AC540F3A and CD74ACT540E, the CD54ACT540F3A uniquely combines QML Class V qualification, TTL-compatible inputs, and 6.5 ns speed - making it the only option for production avionics and defense systems requiring full compliance and guaranteed performance across –55°C to +125°C.
Availability
CD54ACT540F3A is available at Aetrix Electronics and suitable for avionics data bus interface, military vehicle control systems, secure communications modules, and radiation-hardened test equipment requiring stable component supply across extended temperature ranges and long lifecycle support.
Supply support for CD54ACT540F3A 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 with emphasis on reliability, precision, and industrial/military qualification.
The CD54ACT540F3A belongs to TI's military-grade logic portfolio, engineered specifically for high-integrity digital interfacing in defense, aerospace, and critical infrastructure systems where failure is not an option.
FAQ
What is the operating temperature range for CD54ACT540F3A?
The CD54ACT540F3A is rated for –55°C to +125°C, fully qualified per MIL-PRF-38535 Class V for military and aerospace applications. This range is guaranteed without derating and includes full electrical testing at both extremes, making CD54ACT540F3A suitable for engine bay, satellite payload, and airborne computing environments.
Does CD54ACT540F3A have bus-hold functionality on its inputs?
No, CD54ACT540F3A does not include internal bus-hold circuitry. Unused inputs must be externally terminated with pull-up or pull-down resistors to prevent floating states that could cause excessive current draw or metastability. This design choice preserves signal integrity and simplifies layout in high-reliability systems where deterministic behavior is mandatory.
What package type is used for CD54ACT540F3A?
CD54ACT540F3A uses a 20-pin ceramic dual-in-line package (CDIP, J package drawing), hermetically sealed and lead-finished with solderable tin-lead alloy. This package provides superior moisture resistance, thermal stability, and mechanical robustness compared to plastic alternatives - essential for long-term deployment in harsh operational environments.
How does CD54ACT540F3A differ from CD74ACT540M in terms of qualification?
CD54ACT540F3A is QML Class V certified per MIL-PRF-38535 with full military screening, lot traceability, and extended temperature validation. CD74ACT540M is a commercial-grade SOIC variant with RoHS-compliant finish and only industrial temperature rating (–40°C to +85°C), lacking hermetic sealing and military-level reliability testing - making CD54ACT540F3A the sole choice for flight-critical designs.
What is the maximum output current per pin for CD54ACT540F3A?
The CD54ACT540F3A supports ±50 mA DC output source or sink current per output pin, verified across the full –55°C to +125°C range. This allows direct driving of 50-Ω transmission lines, termination networks, or multiple TTL loads without external buffers - a key capability for minimizing component count in compact, high-density military PCBs.
CD54ACT540F3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CD54ACT540F3A FAQ
1.How can I place an order for CD54ACT540F3A through Aetrix?
Please submit a Request for Quotation (RFQ) for CD54ACT540F3A 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 CD54ACT540F3A reliable?
The price and inventory of CD54ACT540F3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD54ACT540F3A is usually 5 days.
3.What payment methods are accepted for CD54ACT540F3A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD54ACT540F3A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD54ACT540F3A?
CD54ACT540F3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD54ACT540F3A 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 CD54ACT540F3A?
For technical support, including CD54ACT540F3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD54ACT540F3A requirements.
6.How does Aetrix verify that CD54ACT540F3A is sourced from the original manufacturer or authorized distributors?
All CD54ACT540F3A 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 CD54ACT540F3A meets industry standards.
7.What is the process for return or replacement of CD54ACT540F3A?
All CD54ACT540F3A units undergo pre-shipment inspection (PSI). If there is an issue with CD54ACT540F3A, 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 CD54ACT540F3A part is unused and in its original packaging.
Return procedure for CD54ACT540F3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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