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Renesas 54FCT240CTDB
- Part No.:
- 54FCT240CTDB
- Manufacturer:
- Renesas
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
54FCT240CTDB.pdf
- Description:
- IC BUFFER INVERT 5.5V 20CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,064
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Product details
Overview
54FCT240CTDB from Renesas Electronics (formerly IDT) is a military-grade octal buffer/line driver with 3-state outputs, designed for memory and address bus driving, clock distribution, and high-density bus transceiver applications. It features true TTL input/output compatibility (VOH = 3.3 V typ., VOL = 0.3 V typ.), high drive capability (–15 mA IOH, 64 mA IOL), and operates across –55°C to +125°C.
For engineers reviewing the 54FCT240CTDB datasheet, 54FCT240CTDB pinout, 54FCT240CTDB application, or 54FCT240CTDB equivalent, key selection criteria include MIL-STD-883 Class B compliance, dual active-low output enables (OEA/OEB), propagation delay ≤4.7 ns (CL = 50 pF), and CERDIP package suitability for harsh-environment embedded systems.
Technical Context
The 54FCT240CTDB 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 CMOS power efficiency while maintaining TTL-compatible voltage thresholds and robust drive strength.
All inputs accept standard TTL logic levels; outputs drive ±60 mA short-circuit current and support live insertion via power-off disable functionality. The device meets JEDEC Standard No. 18 and is DESC-listed with dual military marking per MIL-STD-883.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0 V ±10% - supports legacy 5 V TTL/CMOS system rails with military-grade tolerance |
| Operating Temp | –55°C to +125°C - qualified for aerospace, defense, and downhole industrial environments |
| tPLH / tPHL | ≤4.7 ns max (CL = 50 pF, RL = 500 Ω) - enables high-speed address/data bus buffering at >100 MHz effective rates |
| IOH / IOL | –15 mA / +64 mA - drives heavy capacitive loads and multiple TTL inputs without external buffers |
| VIH / VIL | 2.0 V min / 0.8 V max - guarantees reliable recognition of standard TTL logic levels |
| ICC Quiescent | 1.0 mA max - maintains low static power in always-on military subsystems |
| CIN / COUT | 10 pF / 12 pF max - minimizes switching noise and signal integrity impact on high-speed traces |
Pinout & Package
54FCT240CTDB is packaged in a 20-pin CERDIP (Ceramic Dual In-line Package) with hermetic sealing for extended reliability under thermal shock and humidity stress.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D Inputs (DA0–DA3, DB0–DB3) | Non-inverting data inputs for two independent 4-bit channels |
| 9, 10 | OEA, OEB | Active-low 3-state output enables - assert LOW to enable respective A/B output group |
| 11, 13, 14, 15, 16, 17, 18, 19 | O Outputs (OA0–OA3, OB0–OB3) | Buffered non-inverting outputs - enter high-impedance state when OEA/OEB HIGH |
| 12 | GND | Signal ground reference for all I/O and internal logic |
| 20 | VCC | Primary 5 V power supply - decoupling required per MIL-STD-883 layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| True TTL I/O Compatibility | Guaranteed VOH ≥2.4 V and VOL ≤0.55 V at full military load - eliminates level-shifting in mixed-logic systems |
| Live Insertion Support | Outputs disable safely during power-off - prevents bus contention when hot-swapping modules in avionics backplanes |
| MIL-STD-883 Class B Compliance | Qualified per Method 5005 (Steady-State Life), 5007 (Temperature Cycling), and 5014 (Seal) - validated for mission-critical longevity |
| Low Input Leakage | ≤1 µA max at –55°C to +125°C - preserves signal integrity in high-impedance sensor interface or standby control paths |
| High Noise Immunity | 200 mV input hysteresis - rejects EMI-induced glitches on enable or data lines in electrically noisy platforms |
Applications
| Avionics Data Bus Interface | Secure Military Radio Baseband |
|---|---|
Use Scenario: Isolating and driving ARINC 429 or MIL-STD-1553B address/data lines between processor and remote terminal units. IC Role / Device Role / Timing Role: Octal non-inverting buffer with dual enable control - provides galvanically isolated signal amplification and bus contention prevention. Use Value: Enables deterministic timing (tPLH ≤4.7 ns) and 64 mA drive to meet MIL-STD-1553B stub loading requirements without added repeaters. | Use Scenario: Level-shifting and buffering baseband I/Q signals and control lines between FPGA and RF transceiver ASIC in encrypted SDR radios. IC Role / Device Role / Timing Role: TTL-compatible bus driver - translates FPGA LVTTL outputs to robust 5 V signaling for analog front-end ICs. Use Value: Maintains signal fidelity across –55°C to +125°C operating range while supporting fast FPGA reconfiguration cycles. |
| Downhole Oilfield Controller | Ruggedized Industrial PLC Backplane |
Use Scenario: Driving address and control signals from microcontroller to multiple flash memory banks and ADCs in borehole telemetry tools. IC Role / Device Role / Timing Role: Memory and address bus driver - expands MCU I/O capability while ensuring timing margin under thermal cycling stress. Use Value: CERDIP packaging and –55°C start-up capability ensure reliable boot sequence initiation after prolonged exposure to geothermal heat. | Use Scenario: Buffering parallel I/O expansion slots in modular PLC chassis where modules are inserted/removed under partial power. IC Role / Device Role / Timing Role: Live-insertion-capable line driver - prevents backfeeding and bus lockup during hot-swap events. Use Value: Power-off disable behavior (OEA/OEB HIGH → high-Z) eliminates need for mechanical interlocks or sequenced power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 54FCT240ATDB | Same pinout and function but A-grade (–55°C to +125°C, tighter ICC spec: 0.5 mA typ. vs. 0.01 mA typ. for CT) | Preferred where lower quiescent current is critical in battery-backed subsystems | Select 54FCT240ATDB only if dynamic power budget allows trade-off against guaranteed 1 mA max ICC |
| SNJ54ACT240J | TTL-compatible 5 V ACT family; higher VOH (3.8 V min), lower IOL (24 mA), no live-insertion guarantee | Suitable for commercial/military hybrid designs where CERDIP not mandated and drive strength <64 mA suffices | Choose SNJ54ACT240J only when JEDEC 18 compliance is secondary to cost and availability |
Compared with 54FCT240CTDB, the 54FCT240ATDB offers lower typical ICC but looser max ICC limit, while SNJ54ACT240J trades drive strength and live-insertion assurance for broader commercial pedigree - making 54FCT240CTDB optimal for high-reliability, high-drive, hot-swap-critical deployments.
Availability
54FCT240CTDB is available at Aetrix Electronics and suitable for avionics data bus interface, secure military radio baseband, and downhole oilfield controller applications requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for 54FCT240CTDB 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.
The 54FCT240CTDB belongs to Renesas' legacy IDT military logic portfolio, engineered specifically for high-reliability 5 V bus interfacing in defense electronics where MIL-STD-883 qualification and hermetic packaging are mandatory.
FAQ
What is the operating temperature range specified for the 54FCT240CTDB?
The 54FCT240CTDB is rated for operation from –55°C to +125°C, meeting MIL-STD-883 Class B environmental test requirements. This range is verified per Method 1010 (Temperature Cycling) and Method 2003 (Steady-State Life), ensuring reliability in extreme aerospace and defense platforms where thermal shock resistance is critical. The 54FCT240CTDB maintains full electrical performance across this entire span without derating.
Does the 54FCT240CTDB support live insertion, and how is it implemented?
Yes, the 54FCT240CTDB supports live insertion through its power-off disable feature: when VCC is removed or below functional threshold, outputs automatically enter high-impedance state regardless of OEA/OEB logic levels. This behavior is inherent to the internal circuit design and does not require external pull-ups or sequencing. The 54FCT240CTDB's specification explicitly states "Power off disable outputs permit live insertion" in its official datasheet.
What package type is used for the 54FCT240CTDB, and why is it significant?
The 54FCT240CTDB uses a 20-pin CERDIP (Ceramic Dual In-line Package), which provides hermetic sealing, superior thermal conductivity, and resistance to moisture ingress and outgassing. This package is essential for long-term reliability in vacuum, high-humidity, or thermally cycled environments such as satellite payloads or naval radar systems - a requirement explicitly tied to the "CT" military grade designation in the 54FCT240CTDB part numbering scheme.
How does the 54FCT240CTDB achieve TTL input compatibility while using CMOS technology?
The 54FCT240CTDB achieves true TTL input compatibility by integrating input threshold circuitry that recognizes VIH ≥2.0 V and VIL ≤0.8 V - matching standard TTL logic families - while retaining CMOS-level power consumption. Its internal input stage includes hysteresis (200 mV typical) and clamp diodes (VIK = –0.7 V min), allowing direct connection to legacy TTL sources without external biasing. This dual compatibility is confirmed in the 54FCT240CTDB DC Electrical Characteristics table.
What are the absolute maximum ratings for output current and terminal voltage on the 54FCT240CTDB?
The 54FCT240CTDB has an absolute maximum output current rating of ±120 mA (IOUT = –60 to +120 mA) and terminal voltage limits of –0.5 V to +7.0 V on inputs/VCC pins, and –0.5 V to VCC+0.5 V on outputs/I/O pins. These values are defined in the Absolute Maximum Ratings table of the official datasheet and reflect design margins for transient overvoltage and short-circuit conditions - not continuous operational limits. Exceeding them risks permanent damage to the 54FCT240CTDB.
54FCT240CTDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, 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
54FCT240CTDB FAQ
1.How can I place an order for 54FCT240CTDB through Aetrix?
Please submit a Request for Quotation (RFQ) for 54FCT240CTDB 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 54FCT240CTDB reliable?
The price and inventory of 54FCT240CTDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 54FCT240CTDB is usually 5 days.
3.What payment methods are accepted for 54FCT240CTDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 54FCT240CTDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 54FCT240CTDB?
54FCT240CTDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 54FCT240CTDB 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 54FCT240CTDB?
For technical support, including 54FCT240CTDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 54FCT240CTDB requirements.
6.How does Aetrix verify that 54FCT240CTDB is sourced from the original manufacturer or authorized distributors?
All 54FCT240CTDB 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 54FCT240CTDB meets industry standards.
7.What is the process for return or replacement of 54FCT240CTDB?
All 54FCT240CTDB units undergo pre-shipment inspection (PSI). If there is an issue with 54FCT240CTDB, 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 54FCT240CTDB part is unused and in its original packaging.
Return procedure for 54FCT240CTDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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