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Texas Instruments SNJ54AS808BFK
- Part No.:
- SNJ54AS808BFK
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 20-CLCC
- Datasheet:
-
SNJ54AS808BFK.pdf
- Description:
- IC GATE AND 6CH 2-INP 20LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,658
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Product details
Overview
SNJ54AS808BFK from Texas Instruments is a military-grade hex 2-input AND gate logic IC in ceramic LCCC (FK) package, operating across −55°C to 125°C, with typical propagation delay of 3.2 ns (CL = 50 pF), output drive capability of ±48 mA, and supply voltage range 4.5 V to 5.5 V. It serves as a high-speed, high-drive combinational logic buffer in avionics timing control and radiation-tolerant digital subsystems.
For engineers reviewing the SNJ54AS808BFK datasheet, SNJ54AS808BFK pinout, SNJ54AS808BFK application, or SNJ54AS808BFK equivalent, key selection considerations include its military temperature rating, LCCC hermetic packaging, 20-pin leadless ceramic layout, and AS-series TTL-compatible logic thresholds and drive strength.
Technical Context
This device implements six independent positive-logic AND gates (Y = A • B) using advanced Schottky-clamped bipolar transistor architecture. Each gate features totem-pole outputs with guaranteed VOH ≥ 2.4 V at IOH = −40 mA and VOL ≤ 0.35 V at IOL = 48 mA under VCC = 4.5 V.
Propagation delays are symmetric: tPLH and tPHL both range from 1 ns to 6.5 ns over full military temperature range, with typical 3.2 ns at CL = 50 pF. Power dissipation remains below 13 mW per gate at nominal conditions, enabled by low ICCL (20–33 mA) and ICCH (8–13 mA) currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Six independent 2-input AND gates (Y = A • B), positive-logic operation only |
| Supply Voltage Range | 4.5 V to 5.5 V - supports stable operation across wide input rail variation without level-shifting |
| Propagation Delay | Typ. 3.2 ns (CL = 50 pF) - enables sub-300 MHz clock domain interfacing in synchronous logic |
| Output Drive | ±48 mA - drives heavy capacitive loads (e.g., >100 pF buses) or multiple TTL inputs directly |
| Operating Temperature | −55°C to 125°C - qualified for airborne, missile, and space-qualified systems per MIL-PRF-38535 |
| Input Thresholds | VIL = 0.8 V max, VIH = 2.0 V min - ensures robust noise margin against EMI in harsh environments |
| Power Dissipation | <13 mW per gate - reduces thermal load in dense logic arrays and sealed enclosures |
Pinout & Package
Ceramic Leadless Chip Carrier (LCCC), FK package: 20-terminal, 8.89 mm × 8.89 mm body, 1.27 mm pitch, 2.03 mm max height, hermetically sealed, no leads - requires solder reflow compatible with Class T peak temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6A, 6B | Input terminals (12 total) | Gate-specific logic inputs; each pair feeds one AND gate; all share common VIH/VIL thresholds |
| 1Y, 2Y, 3Y, 4Y, 5Y, 6Y | Output terminals (6 total) | Active-high totem-pole outputs; each delivers full ±48 mA drive into defined load conditions |
| VCC | Positive supply | Pin 10 - must be decoupled locally; supplies all six gates; tolerant to 7 V absolute max |
| GND | Ground reference | Pin 11 - primary return path; critical for noise immunity and switching integrity in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| High capacitive-drive capability | Supports direct driving of >100 pF trace capacitance or fan-out to ≥20 standard TTL loads |
| Military temperature qualification | Full −55°C to 125°C operation verified per MIL-STD-883, enabling use in defense flight computers |
| Low propagation skew | Matched tPLH/tPHL (1–6.5 ns) ensures deterministic timing across all six gates in parallel paths |
| Hermetic LCCC packaging | FK package provides moisture resistance, thermal stability, and long-term reliability in vacuum or high-humidity environments |
| AS-series speed-power optimization | 3.2 ns delay with <13 mW/gate achieves superior speed-to-power ratio vs. ALS and F families |
Applications
| Avionics Timing Control | Mission Computer Bus Gating |
|---|---|
|
Use Scenario: Synchronizing discrete sensor enable signals before feeding into ADC sampling clocks in flight control units. IC Role / Device Role / Timing Role: Hex AND gate performing real-time signal masking and clock-enable gating with nanosecond-level timing precision. Use Value: Enables deterministic, jitter-free sensor data capture by ensuring only valid windows pass through - critical for closed-loop stability. |
Use Scenario: Enabling/disabling data transfers between processor local bus and MIL-STD-1553B interface buffers during fault isolation sequences. IC Role / Device Role / Timing Role: Logic-level bus arbitration gate controlling write strobes and direction signals in dual-redundant computing modules. Use Value: Provides fail-safe bus segmentation without added latency - maintains system partitioning integrity during transient faults. |
| Radiation-Hardened FPGA I/O Conditioning | Tactical Radio Baseband Logic |
|
Use Scenario: Level-shifting and current-boosting FPGA I/O pins driving legacy TTL peripherals in satellite payload controllers. IC Role / Device Role / Timing Role: Interface buffer translating FPGA CMOS outputs to AS-series compatible voltage/current levels with minimal added delay. Use Value: Preserves setup/hold margins while delivering robust drive strength - essential for reliable operation after total ionizing dose exposure. |
Use Scenario: Implementing channel-select decoding and PTT (push-to-talk) logic in handheld SDR transceivers operating in extreme ambient temperatures. IC Role / Device Role / Timing Role: Combinational logic engine generating synchronized RF path enable signals from microcontroller GPIOs. Use Value: Guarantees clean, bounce-free RF switching transitions even at −40°C and +85°C - prevents spurious emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex 2-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54AS808BJ | Same logic function and electrical specs, but in 20-pin ceramic DIP (J) package with through-hole leads | Preferred for prototyping, manual assembly, or legacy board upgrades where LCCC rework is impractical | Select when mechanical compatibility with existing DIP footprints or hand-soldering requirements dominate |
| SN54AS808BJ | Identical functionality and military temp rating, but marked per standard SN54AS808BJ part number (non-JAN prefix) | Used in non-JAN-certified defense programs where QML-38535 compliance is not mandated | Select when procurement documentation requires standard TI military part numbering without JAN prefix |
Compared with SNJ54AS808BFK, SNJ54AS808BJ offers identical performance in a through-hole package for easier test and repair, while SN54AS808BJ provides the same military-grade logic in a non-JAN-marked variant suitable for cost-sensitive defense contracts without full QML certification.
Availability
SNJ54AS808BFK is available at Aetrix Electronics and suitable for avionics timing control, mission computer bus gating, and radiation-hardened FPGA I/O conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SNJ54AS808BFK 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.
The SNJ54AS808BFK belongs to TI's military-grade AS-series TTL logic family, designed specifically for high-speed, high-drive digital control in mission-critical systems where temperature resilience and hermetic packaging are mandatory.
FAQ
What logic function does the SNJ54AS808BFK implement?
The SNJ54AS808BFK implements six independent 2-input AND gates operating in positive logic (Y = A • B). Each gate has totem-pole outputs and shares identical input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output drive capability (±48 mA). It does not support OR functionality - that requires separate devices or external wiring.
Is SNJ54AS808BFK compatible with standard 5 V TTL logic families?
Yes, SNJ54AS808BFK is fully compatible with standard 5 V TTL logic families. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), output voltage levels (VOH ≥ 2.4 V at −40 mA, VOL ≤ 0.35 V at 48 mA), and 4.5–5.5 V supply range align with TTL specifications. The SNJ54AS808BFK may drive up to 20 standard TTL loads directly due to its high-output current capability.
What is the package type and mounting method for SNJ54AS808BFK?
SNJ54AS808BFK uses a 20-terminal ceramic leadless chip carrier (LCCC), designated FK package. It has an 8.89 mm × 8.89 mm body, 1.27 mm terminal pitch, and requires surface-mount reflow soldering. The package is hermetically sealed and rated for peak reflow temperatures appropriate for Class T profiles - no lead finish restrictions apply since it uses SNPB (tin-lead) terminations.
Does SNJ54AS808BFK support 3-state or open-collector outputs?
No, SNJ54AS808BFK does not support 3-state or open-collector outputs. All six outputs are active-high totem-pole configurations with no output enable (OE) pins or open-drain capability. The SNJ54AS808BFK is strictly a combinational AND gate array - bus-sharing or wired-OR configurations require external components or alternative logic families such as 74AS240 or 74AS244.
What is the maximum operating temperature range for SNJ54AS808BFK?
The SNJ54AS808BFK is characterized for continuous operation from −55°C to 125°C, meeting MIL-PRF-38535 requirements for Class B (military) applications. This rating is validated across all electrical parameters including propagation delay, output drive, and power consumption - no derating is required within this full range, making SNJ54AS808BFK suitable for engine bay, radar, and space-qualified electronics.
SNJ54AS808BFK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54AS
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- AND Gate
- Number of Circuits:
- 6
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 33 mA
- Current - Output High, Low:
- 40mA, 40mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 6.5ns @ 5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
SNJ54AS808BFK FAQ
1.How can I place an order for SNJ54AS808BFK through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54AS808BFK 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 SNJ54AS808BFK reliable?
The price and inventory of SNJ54AS808BFK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54AS808BFK is usually 5 days.
3.What payment methods are accepted for SNJ54AS808BFK?
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4.How is shipping managed for SNJ54AS808BFK?
SNJ54AS808BFK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54AS808BFK 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 SNJ54AS808BFK?
For technical support, including SNJ54AS808BFK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54AS808BFK requirements.
6.How does Aetrix verify that SNJ54AS808BFK is sourced from the original manufacturer or authorized distributors?
All SNJ54AS808BFK 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 SNJ54AS808BFK meets industry standards.
7.What is the process for return or replacement of SNJ54AS808BFK?
All SNJ54AS808BFK units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54AS808BFK, 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 SNJ54AS808BFK part is unused and in its original packaging.
Return procedure for SNJ54AS808BFK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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