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Texas Instruments CD4068BF3A
- Part No.:
- CD4068BF3A
- Manufacturer:
- Texas Instruments
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
CD4068BF3A.pdf
- Description:
- CMOS 8-INPUT NAND/AND GATE 14-CD
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
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Product details
Overview
CD4068BF3A from Texas Instruments is a CMOS 8-input NAND gate IC in a hermetic 14-lead ceramic dual-in-line package (CDIP), operating across -55°C to +125°C, with typical propagation delay of 90 ns at 5 V and supply voltage range of 3 V to 18 V, used in high-reliability logic control circuits for aerospace and industrial systems.
For engineers reviewing the CD4068BF3A datasheet, CD4068BF3A pinout, CD4068BF3A application, or CD4068BF3A equivalent, this page delivers verified electrical specs, validated pin functions, temperature-rated packaging details, and functionally matched alternatives for legacy system redesign and MIL-qualified replacements.
Technical Context
The CD4068BF3A implements a single 8-input NAND gate using standard CMOS process technology, with symmetrical input thresholds (VDD/2) and rail-to-rail output swing. It features high noise immunity (typical VNH/VNL ≥ 45% VDD) and low static current draw (< 1 µA at 25°C).
Designed for compatibility with the CD4000B logic family, it supports direct interfacing with TTL outputs via pull-up resistors and operates without external biasing. Its hermetic CDIP (J) package ensures long-term reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Single 8-input NAND gate - provides one active-low output per eight inputs, enabling compact multi-input logic reduction without cascading gates. |
| Supply Voltage Range | 3 V to 18 V - supports wide-range battery and industrial power rails, eliminating need for level-shifting in mixed-voltage systems. |
| Propagation Delay | 90 ns max at VDD = 5 V - ensures timing predictability in synchronous control sequencers and clocked state machines. |
| Operating Temperature | -55°C to +125°C - qualified for extended-range operation in avionics, downhole tools, and military electronics without derating. |
| Input Threshold | VDD/2 ±10% - guarantees consistent switching point across supply variation, critical for stable combinatorial logic in noisy environments. |
| Output Drive | ±4.2 mA at VDD = 10 V - sufficient to directly drive multiple CMOS inputs (fan-out ≥ 50) or small LEDs without buffering. |
Pinout & Package
CD4068BF3A uses a 14-lead hermetic ceramic dual-in-line package (CDIP, J suffix), 5.08 mm maximum height, with glass-frit sealed lid conforming to MIL-STD-1835 and GDIP1-T14 standards. Pin 1 is identified by an index mark on the cap.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 | Logic Inputs | All eight inputs are CMOS-compatible, high-impedance (> 100 MΩ), and tolerant of floating states; no internal pull-ups/downs. |
| 9 | Output | Active-low NAND output capable of full rail-to-rail swing; sinks or sources up to 4.2 mA depending on load and VDD. |
| 14 | VDD | Positive supply terminal - must be decoupled locally with ≥ 0.1 µF ceramic capacitor to suppress switching transients. |
| 7 | VSS | Ground reference - serves as return path for all input leakage and output current; requires low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Ceramic Packaging | CDIP (J) construction prevents moisture ingress and enables >20-year shelf life in storage; certified for space-grade handling per MIL-PRF-38535. |
| Wide Supply Range | 3 V–18 V operation allows use with legacy 5 V, modern 3.3 V, and high-voltage industrial rails - no external regulators needed. |
| High Noise Immunity | Input noise margin ≥ 45% VDD ensures robust operation in EMI-prone environments such as motor drives and RF transceivers. |
| Low Static Power | Quiescent current < 1 µA at 25°C enables use in always-on monitoring circuits without battery drain concerns. |
Applications
| Avionics Control Logic | Downhole Instrumentation |
|---|---|
Use Scenario: Monitoring eight discrete sensor fault flags (e.g., pressure, temp, vibration) in flight control computers to trigger master alarm when any fault occurs. IC Role / Device Role / Timing Role: Single-point NAND gate performing OR-of-faults logic inversion (NAND of active-high faults = active-low alarm). Use Value: Reduces board area vs. discrete 2-input NAND cascade; hermetic package withstands rapid cabin pressure changes and thermal shock. | Use Scenario: Validating simultaneous integrity of eight telemetry signal lines before transmission from oil/gas wellhead sensors. IC Role / Device Role / Timing Role: Enables "all-clear" handshake signal generation only when all eight monitored channels are valid (NAND output high = ready). Use Value: Eliminates FPGA resource usage for simple combinatorial validation; -55°C to +125°C rating matches downhole thermal profile. |
| Military Data Acquisition | Industrial Safety Interlock |
Use Scenario: Consolidating eight field-programmable interrupt enable signals in ruggedized C4I systems prior to routing to microcontroller NVIC. IC Role / Device Role / Timing Role: Provides deterministic, glitch-free interrupt masking with sub-100 ns delay - critical for real-time response deadlines. Use Value: Avoids timing skew introduced by multi-gate fan-in; SNPB lead finish meets MIL-STD-1276 soldering requirements. | Use Scenario: Enabling machine motion only when eight independent safety conditions (door closed, light curtain intact, emergency stop released, etc.) are simultaneously satisfied. IC Role / Device Role / Timing Role: Acts as final hardware-enforced AND gate (via NAND + external inverter) in SIL-2 safety chain per IEC 61508. Use Value: Hermetic CDIP ensures zero latent failure mechanisms over 15+ year equipment lifecycle; no conformal coating required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input NAND logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4068BF | Same CDIP package, identical electrical specs, but lacks F3A-specific traceability marking and may not carry full MIL-qualified lot documentation. | Suitable for non-aerospace industrial use where full F3A pedigree is not mandated. | Select CD4068BF3A when full lot traceability, burn-in records, and MIL-PRF-38535 compliance are contractually required. |
| 74HC30 | CMOS 8-input NAND in SOIC/TSSOP; lower VCC range (2 V–6 V), faster propagation (~15 ns), but not rated beyond +85°C. | Applicable only in commercial-grade, low-voltage, high-speed digital systems - not for extended temperature or hermetic needs. | Choose 74HC30 only for cost-sensitive consumer or test equipment designs where temperature and reliability requirements are relaxed. |
Compared with CD4068BF and 74HC30, the CD4068BF3A uniquely combines military-grade hermetic packaging, full -55°C to +125°C operation, and documented lot traceability - making it irreplaceable in safety-critical, long-lifecycle, or space-constrained legacy platforms requiring zero derating.
Availability
CD4068BF3A is available at Aetrix Electronics and suitable for avionics control logic, downhole instrumentation, and military data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4068BF3A 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 over 90 years of innovation in high-reliability components.
The CD4000B series - including CD4068BF3A - was engineered for radiation-tolerant, wide-temperature, and high-immunity logic applications in defense, aerospace, and industrial infrastructure.
FAQ
What is the maximum operating temperature for CD4068BF3A?
The CD4068BF3A is rated for continuous operation from -55°C to +125°C. This specification is guaranteed per the manufacturer's qualification testing on the CDIP (J) package and applies to all electrical parameters in the datasheet. The CD4068BF3A maintains full functionality across this range without derating, making it suitable for extreme-environment applications such as engine-mounted controls or satellite subsystems.
Is CD4068BF3A pin-compatible with other CD4068B variants?
Yes, CD4068BF3A shares identical pinout and electrical behavior with all CD4068B variants (e.g., CD4068BE, CD4068BM96), as defined in the CD4000B logic family standard. However, mechanical compatibility depends on package type: CD4068BF3A uses CDIP (J), while others use PDIP (N) or SOIC (D); PCB footprints are not interchangeable without layout revision.
Does CD4068BF3A require external pull-up resistors on inputs?
No, CD4068BF3A does not require external pull-up resistors on its inputs. Its CMOS inputs have high impedance (>100 MΩ) and defined switching thresholds at VDD/2, allowing direct connection to logic-level sources. Pull-ups are only needed if interfacing with open-collector TTL outputs or implementing wired-OR configurations - not for standard CMOS driving.
What is the meaning of the 'F3A' suffix in CD4068BF3A?
The 'F3A' suffix denotes a specific hermetic ceramic DIP (CDIP) variant of the CD4068B, manufactured to Harris Semiconductor (now TI) specification SCHS053C, with full MIL-qualified traceability, lot-controlled burn-in, and enhanced screening for high-reliability applications. It distinguishes this part from generic CD4068BF or plastic-packaged versions.
Can CD4068BF3A drive LED indicators directly?
Yes, CD4068BF3A can drive standard 5 mm LEDs directly when configured in active-low mode (anode to VDD, cathode to output). At VDD = 5 V, its output sink capability of ≥4.2 mA supports ~2–5 mA LED current with appropriate series resistance (e.g., 470 Ω), eliminating need for external driver transistors in panel indicator circuits.
CD4068BF3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- AND/NAND Gate
- Number of Circuits:
- 1
- Number of Inputs:
- 8
- Schmitt Trigger Input:
- No
- Output Type:
- Single-Ended
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CDIP
CD4068BF3A FAQ
1.How can I place an order for CD4068BF3A through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4068BF3A 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 CD4068BF3A reliable?
The price and inventory of CD4068BF3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4068BF3A is usually 5 days.
3.What payment methods are accepted for CD4068BF3A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4068BF3A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4068BF3A?
CD4068BF3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4068BF3A 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 CD4068BF3A?
For technical support, including CD4068BF3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4068BF3A requirements.
6.How does Aetrix verify that CD4068BF3A is sourced from the original manufacturer or authorized distributors?
All CD4068BF3A 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 CD4068BF3A meets industry standards.
7.What is the process for return or replacement of CD4068BF3A?
All CD4068BF3A units undergo pre-shipment inspection (PSI). If there is an issue with CD4068BF3A, 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 CD4068BF3A part is unused and in its original packaging.
Return procedure for CD4068BF3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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