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Renesas 54FCT244TDB
- Part No.:
- 54FCT244TDB
- Manufacturer:
- Renesas
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
54FCT244TDB.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:632
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Product details
Overview
54FCT244TDB from Renesas Electronics (formerly IDT) is a military-grade octal 3-state buffer/line driver in CERDIP package, featuring TTL-compatible inputs/outputs (VIH = 2V min, VIL = 0.8V max), high-drive capability (–15mA IOH, 64mA IOL), and operation across –55°C to +125°C. It serves as a memory address driver, clock fanout buffer, and bus transceiver in ruggedized avionics and defense systems.
For engineers reviewing the 54FCT244TDB datasheet, 54FCT244TDB pinout, 54FCT244TDB application, or 54FCT244TDB equivalent, key selection criteria include MIL-STD-883 Class B compliance, dual enable control (OEA/OEB), propagation delay ≤7ns (CL = 50pF), and live-insertion support via power-off disable outputs.
Technical Context
The 54FCT244TDB implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low 3-state enable (OEA for A-side, OEB for B-side). Its dual-metal CMOS process ensures compatibility with TTL logic levels while delivering CMOS power efficiency (ICC ≤1mA at quiescent state).
All eight outputs enter high-impedance state when either OEA or OEB is HIGH; both enables must be LOW for output drive. Input leakage is ≤±1µA over full temperature range, and absolute maximum terminal voltage is –0.5V to VCC+0.5V on I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0V ±10% - supports legacy 5V TTL/CMOS system rails without level translation |
| Operating Temp | –55°C to +125°C - qualified per MIL-STD-883 Class B for aerospace and defense platforms |
| tPLH / tPHL | ≤7ns @ CL=50pF - enables high-speed address/data buffering in real-time embedded control |
| IOH / IOL | –15mA / +64mA - drives heavy capacitive loads (e.g., backplane traces, multiple TTL inputs) |
| VIH / VIL | 2.0V min / 0.8V max - guarantees robust noise margin against TTL-level signals |
| ICC Quiescent | ≤1mA - minimizes standby power in always-on military subsystems |
Pinout & Package
CERDIP-20 (CD20) ceramic dual in-line package with hermetic seal, 2.54mm pitch, 0.3-inch width, and military-grade moisture resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | DA0–DA3, DB0–DB3 Inputs | Non-inverting data inputs for two independent 4-bit channels |
| 9 | GND | Ground reference for all logic and power domains |
| 10, 11, 12, 13, 14, 15, 16, 17 | OA0–OA3, OB0–OB3 Outputs | 3-state buffered outputs; high-impedance when OEA or OEB HIGH |
| 18 | VCC | +5V supply input - decoupling capacitor required near pin |
| 19, 20 | OEA, OEB | Active-LOW enable controls for A- and B-side buffers respectively |
Key Features
| Feature | Design Value |
|---|---|
| MIL-STD-883 Class B qualification | Validated for shock, vibration, temperature cycling, and hermeticity - required for flight-critical hardware |
| Live insertion support | Outputs disable safely during hot-plug events - prevents bus contention in modular chassis |
| TTL-compatible I/O thresholds | VOH ≥2.4V, VOL ≤0.55V at rated load - interoperable with legacy 5V logic families |
| Low input leakage (≤±1µA) | Ensures stable DC logic states under extreme temperature and radiation exposure |
Applications
| Avionics Data Bus Interface | Secure Communication Module |
|---|---|
Use Scenario: Buffering address and control lines between FPGA and radiation-hardened SRAM in flight control computers. IC Role / Device Role / Timing Role: Non-inverting octal buffer with dual enable control isolates memory access timing and prevents bus contention during context switches. Use Value: Propagation delay ≤7ns and MIL-qualified reliability ensure deterministic memory access within hard real-time deadlines. | Use Scenario: Driving encrypted data lanes from ASIC to high-speed serial PHY in secure radio transceivers. IC Role / Device Role / Timing Role: High-current line driver (64mA IOL) maintains signal integrity across long PCB traces in EMI-prone RF enclosures. Use Value: TTL-compatible inputs accept ASIC logic levels directly; CERDIP package resists humidity-induced leakage in sealed modules. |
| Tactical Vehicle Control System | Missile Guidance Processor |
Use Scenario: Interfacing microcontroller GPIOs to relay drivers and sensor multiplexers in armored vehicle ECUs. IC Role / Device Role / Timing Role: Octal buffer provides galvanic isolation and current gain for driving discrete power stages. Use Value: –55°C to +125°C operation sustains functionality during desert heat soak and arctic cold starts. | Use Scenario: Clock distribution and address latching between guidance processor and inertial measurement unit (IMU) memory. IC Role / Device Role / Timing Role: Low-skew buffer ensures synchronous sampling of IMU data with sub-10ns timing margin. Use Value: Dual enable (OEA/OEB) allows time-multiplexed access to shared memory banks without external gating logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 54FCT244ATDB | Same CERDIP-20 package and MIL-STD-883 Class B rating; faster tPLH/tPHL (≤4.8ns vs. ≤7ns) | Preferred where tighter timing margins are required in high-frequency control loops | Select 54FCT244ATDB if propagation delay <5ns is mandatory; otherwise 54FCT244TDB offers cost advantage |
| SNJ54ACT244J | TI's ACT-family equivalent; same pinout, but higher ICC (≤2mA) and wider VOH/VOL spread (VOH ≥2.7V, VOL ≤0.5V) | Used in legacy TI-based designs; requires verification of noise margin compatibility | Choose SNJ54ACT244J only when redesigning existing TI-centric boards; not drop-in due to power and threshold differences |
Compared with 54FCT244ATDB and SNJ54ACT244J, the 54FCT244TDB delivers optimal balance of MIL-qualified reliability, proven field longevity, and lower static power-making it preferred for cost-sensitive, thermally demanding, but timing-tolerant defense subsystems.
Availability
54FCT244TDB is available at Aetrix Electronics and suitable for avionics data bus interface, secure communication module, and tactical vehicle control system requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 54FCT244TDB 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and infrastructure markets.
The 54FCT244TDB belongs to Renesas' legacy IDT military logic family, engineered specifically for high-reliability 5V digital interfacing in defense electronics where radiation tolerance, thermal stability, and long-term obsolescence management are critical.
FAQ
What is the operating temperature range of the 54FCT244TDB?
The 54FCT244TDB operates from –55°C to +125°C and is fully qualified to MIL-STD-883 Class B. This specification is verified through temperature cycling, steady-state life testing, and hermeticity validation - making it suitable for deployment in jet engine bays, missile canisters, and space-qualified payloads where ambient extremes are routine.
Does the 54FCT244TDB support live insertion into powered backplanes?
Yes, the 54FCT244TDB supports live insertion due to its power-off disable feature: outputs automatically enter high-impedance state when VCC is removed or below functional threshold. This behavior is guaranteed across the full military temperature range and prevents bus contention during hot-swap operations in modular avionics chassis.
What package type is used for the 54FCT244TDB?
The 54FCT244TDB is supplied exclusively in the CERDIP-20 (CD20) package - a hermetically sealed ceramic dual in-line package with gold-plated leads. This package meets MIL-PRF-38535 requirements for moisture resistance, thermal shock endurance, and long-term reliability in harsh environmental conditions.
How does the 54FCT244TDB differ from commercial-grade FCT244 variants?
The 54FCT244TDB differs from industrial variants (e.g., 74FCT244T) in three key ways: it is screened to MIL-STD-883 Class B, specified for –55°C to +125°C operation, and packaged in hermetic CERDIP instead of plastic SOIC/SSOP. Electrical parameters such as tPLH (≤7ns) and ICC (≤1mA) are tested and guaranteed across the full military range - not just at +25°C.
Can the 54FCT244TDB drive standard TTL loads directly?
Yes, the 54FCT244TDB is designed for direct TTL interface: its VOH is ≥2.4V at –6mA (MIL), VOL is ≤0.55V at 48mA (MIL), and input thresholds (VIH ≥2.0V, VIL ≤0.8V) match JEDEC Standard 18. This ensures reliable logic-level translation and fanout capability without external level shifters or pull-up resistors.
54FCT244TDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
54FCT244TDB FAQ
1.How can I place an order for 54FCT244TDB through Aetrix?
Please submit a Request for Quotation (RFQ) for 54FCT244TDB 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 54FCT244TDB reliable?
The price and inventory of 54FCT244TDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 54FCT244TDB is usually 5 days.
3.What payment methods are accepted for 54FCT244TDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 54FCT244TDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 54FCT244TDB?
54FCT244TDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 54FCT244TDB 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 54FCT244TDB?
For technical support, including 54FCT244TDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 54FCT244TDB requirements.
6.How does Aetrix verify that 54FCT244TDB is sourced from the original manufacturer or authorized distributors?
All 54FCT244TDB 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 54FCT244TDB meets industry standards.
7.What is the process for return or replacement of 54FCT244TDB?
All 54FCT244TDB units undergo pre-shipment inspection (PSI). If there is an issue with 54FCT244TDB, 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 54FCT244TDB part is unused and in its original packaging.
Return procedure for 54FCT244TDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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