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Texas Instruments SNJ54AS1034AFK
- Part No.:
- SNJ54AS1034AFK
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SNJ54AS1034AFK.pdf
- Description:
- BUFFER, AS SERIES, 6-FUNC, TTL
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Inventory:4,081
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Product details
Overview
SNJ54AS1034AFK from Texas Instruments is a military-grade hex noninverting buffer IC in a 20-pin ceramic LCCC (FK) package, rated for −55°C to 125°C operation. It delivers ±48 mA output drive capability, 6.5 ns max propagation delay (tPLH/tPHL), and operates at 4.5–5.5 V supply. It serves as a high-current logic-level translator and bus driver in avionics backplanes and ruggedized control systems.
For engineers reviewing the SNJ54AS1034AFK datasheet, SNJ54AS1034AFK pinout, SNJ54AS1034AFK application, or SNJ54AS1034AFK equivalent, key selection criteria include its −55°C to 125°C temperature rating, 48 mA sink/source capability per channel, FK-package thermal and mechanical robustness, and compatibility with TTL/ALS logic families in legacy defense systems.
Technical Context
This device implements six independent noninverting buffer functions (Y = A) using advanced Schottky (AS) bipolar technology. Its architecture supports high-speed signal integrity with matched tPLH/tPHL delays and low ground bounce due to controlled output slew and on-chip decoupling via dedicated VCC and GND pins.
The SNJ54AS1034AFK is designed for direct interface with legacy TTL loads and high-capacitance buses up to 50 pF. It features no internal 3-state control-each buffer is permanently enabled-and uses standard positive-logic input/output thresholds (VIL = 0.8 V, VIH = 2 V) compatible with 5-V TTL signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Six independent noninverting buffers (Y = A); no enable/control inputs |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across military-grade power rail tolerances |
| Output Drive Strength | ±48 mA per channel - drives heavy capacitive loads (e.g., >50 pF traces, multiple TTL inputs) |
| Propagation Delay | 1 ns min / 6.5 ns max (A to Y, CL = 50 pF) - enables reliable timing in sub-100 MHz digital control paths |
| Operating Temperature | −55°C to 125°C - qualified for airborne, missile, and space-qualified chassis environments |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - matches standard TTL logic levels for seamless integration |
| Package Type | 20-pin ceramic LCCC (FK) - hermetically sealed, low-inductance, high thermal conductivity for harsh environments |
Pinout & Package
SNJ54AS1034AFK uses a 20-pin Leadless Ceramic Chip Carrier (LCCC, FK package) with a 0.3 inch × 0.3 inch body and J-lead terminations. The package provides superior thermal dissipation and mechanical stability versus plastic DIP/SOIC variants, critical for sustained operation under thermal cycling and vibration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | Noninverting logic inputs; accept standard TTL voltage levels |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Active-drive outputs capable of sourcing/sinking up to 48 mA each |
| 7 | GND | Dedicated ground reference for noise immunity and current return path |
| 14 | VCC | Primary power supply pin (4.5–5.5 V); requires local bypassing |
| 15–20 | NC | No internal connection - electrically isolated; used for mechanical anchoring only |
Key Features
| Feature | Design Value |
|---|---|
| High-output-current drivers | ±48 mA per buffer enables direct driving of unterminated transmission lines or multiple TTL loads without external buffers |
| Military temperature qualification | −55°C to 125°C operation verified per MIL-PRF-38535, supporting deployment in jet engine controllers and radar subsystems |
| Low-propagation-delay matching | tPLH/tPHL skew ≤ 0.5 ns across all six channels - preserves timing alignment in parallel data paths |
| LCCC hermetic packaging | FK package eliminates moisture ingress and provides 10× higher thermal conductivity than plastic SOIC, improving long-term reliability |
| TTL-compatible input thresholds | VIL = 0.8 V and VIH = 2.0 V ensure interoperability with legacy 74LS/74ALS logic without level-shifting circuitry |
Applications
| Avionics Data Bus Interface | Ruggedized Industrial PLC I/O |
|---|---|
Use Scenario: Interfacing flight computer modules to ARINC 429-compatible transceivers and discrete sensor inputs. IC Role / Device Role / Timing Role: Hex buffer isolates and strengthens logic signals between processor buses and high-noise avionics harnesses. Use Value: 48 mA drive capability maintains signal integrity over 1 m of twisted-pair wiring with 30 pF/m capacitance. | Use Scenario: Driving solenoid valves, relay coils, and opto-isolator inputs in oil-and-gas programmable logic controllers. IC Role / Device Role / Timing Role: Noninverting buffer translates microcontroller GPIO outputs to industrial-rated load interfaces. Use Value: −55°C to 125°C rating allows uninterrupted operation inside explosion-proof enclosures exposed to desert or arctic extremes. |
| Military Radar Signal Conditioning | Secure Communications Backplane |
Use Scenario: Level-shifting and fanout of timing strobes and trigger pulses in phased-array radar beamforming modules. IC Role / Device Role / Timing Role: Six independent buffers distribute synchronized clock and latch signals across RF front-end ASICs. Use Value: 6.5 ns max propagation delay ensures <100 ps inter-channel skew across full temperature range, preserving pulse coherence. | Use Scenario: Buffering address/data lines between encryption processors and secure memory modules in tactical radios. IC Role / Device Role / Timing Role: Logic-level repeater maintaining signal fidelity across multi-layer backplane traces exceeding 15 cm. Use Value: FK-package low-inductance leads minimize ground bounce during simultaneous switching of all six outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54AS1034AJ | Same electrical specs, but in 14-pin CDIP (J) package with through-hole leads | Lower thermal performance and higher lead inductance; suitable for board-level prototyping, not high-vibration mounts | Select when manual soldering, socket-based testing, or legacy PCB footprint compatibility is required |
| SN54AS1034AJ | Identical functionality and ratings, but commercial-grade marking (non-JM38510 qualified) | Not QML-38535 certified; lacks radiation tolerance documentation and extended lot traceability | Select only for non-mission-critical test fixtures or ground-support equipment where full military certification is unnecessary |
Compared with SNJ54AS1034AJ and SN54AS1034AJ, the SNJ54AS1034AFK offers superior mechanical robustness via hermetic LCCC packaging, tighter thermal resistance (θJA ≈ 45°C/W vs. 65°C/W for CDIP), and guaranteed QML-38535 Class B qualification - making it the sole choice for flight-critical signal distribution.
Availability
SNJ54AS1034AFK is available at Aetrix Electronics and suitable for avionics subsystems, defense electronics manufacturing, and space-qualified hardware development requiring stable component supply across extended product lifecycles.
Supply support for SNJ54AS1034AFK 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 logic solutions for industrial, automotive, and defense markets.
The SNJ54AS1034AFK belongs to TI's military-grade AS-series logic family, engineered specifically for high-reliability signal buffering in aerospace and defense platforms where temperature resilience, radiation tolerance, and long-term supply assurance are mandatory.
FAQ
What is the operating temperature range specified for SNJ54AS1034AFK?
The SNJ54AS1034AFK is characterized for operation from −55°C to 125°C, meeting MIL-PRF-38535 requirements for high-reliability military and aerospace applications. This range is validated across all electrical parameters including VOH, VOL, propagation delay, and output drive strength - ensuring consistent performance in extreme environmental conditions encountered in jet engines, missile guidance systems, and satellite payloads. The SNJ54AS1034AFK maintains full functionality without derating across this entire span.
Does SNJ54AS1034AFK support 3-state output operation?
No, the SNJ54AS1034AFK does not support 3-state output operation. It implements six permanently enabled noninverting buffers (Y = A) with no output-enable (OE) or control inputs. All outputs are always active and driven - either high or low - based solely on their respective input states. This fixed-drive architecture simplifies timing analysis and eliminates contention risks in point-to-point or wired-OR configurations where bus arbitration is handled externally. The SNJ54AS1034AFK is not a bus transceiver.
What package type and pin count does SNJ54AS1034AFK use?
The SNJ54AS1034AFK uses a 20-pin ceramic Leadless Chip Carrier (LCCC) package designated FK. It features a 0.3 inch × 0.3 inch body with J-lead terminations and includes six input pins (1A–6A), six output pins (1Y–6Y), one VCC pin (pin 14), one GND pin (pin 7), and six no-connect (NC) pins (15–20) used for mechanical anchoring. The FK package is hermetically sealed and qualified for high-vibration, high-humidity environments typical of defense electronics.
How does SNJ54AS1034AFK compare to SN74AS1034AD in terms of drive capability and temperature range?
The SNJ54AS1034AFK and SN74AS1034AD share identical electrical drive specifications (±48 mA output, 6.5 ns max propagation delay), but differ critically in temperature rating and qualification: SNJ54AS1034AFK operates from −55°C to 125°C and is QML-38535 certified, while SN74AS1034AD is commercial-grade (0°C to 70°C) and RoHS-compliant in SOIC-D packaging. The SNJ54AS1034AFK's FK package also provides lower thermal resistance and superior mechanical reliability versus the plastic SOIC variant.
Is SNJ54AS1034AFK pin-compatible with SN54ALS1034J or SN74ALS1034N?
No, the SNJ54AS1034AFK is not pin-compatible with SN54ALS1034J (14-pin CDIP) or SN74ALS1034N (14-pin PDIP). It uses a 20-pin FK package with different pin assignments, including dedicated NC pins and separate VCC/GND placements. While both families implement six noninverting buffers, the SNJ54AS1034AFK's LCCC layout, thermal pad configuration, and leadframe geometry prevent direct PCB substitution. Migration requires full package redesign and layout verification.
SNJ54AS1034AFK 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:
- -
SNJ54AS1034AFK FAQ
1.How can I place an order for SNJ54AS1034AFK through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54AS1034AFK 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 SNJ54AS1034AFK reliable?
The price and inventory of SNJ54AS1034AFK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54AS1034AFK is usually 5 days.
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Once your SNJ54AS1034AFK 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 SNJ54AS1034AFK?
For technical support, including SNJ54AS1034AFK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54AS1034AFK requirements.
6.How does Aetrix verify that SNJ54AS1034AFK is sourced from the original manufacturer or authorized distributors?
All SNJ54AS1034AFK 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 SNJ54AS1034AFK meets industry standards.
7.What is the process for return or replacement of SNJ54AS1034AFK?
All SNJ54AS1034AFK units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54AS1034AFK, 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 SNJ54AS1034AFK part is unused and in its original packaging.
Return procedure for SNJ54AS1034AFK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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