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Texas Instruments SNJ54AS174J
- Part No.:
- SNJ54AS174J
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
SNJ54AS174J.pdf
- Description:
- HEX/QUADRUPLE D-TYPE FLIP-FLOPS
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
SNJ54AS174J from Texas Instruments is a military-grade hex D-type flip-flop with single-rail outputs, direct-clear input, and positive-edge clock triggering in a 16-pin CDIP package. It operates across –55°C to 125°C, delivers 100 MHz max clock frequency, supports 20 mA output drive, and is used in radiation-tolerant buffer/storage registers and shift registers for aerospace avionics.
For engineers reviewing the SNJ54AS174J datasheet, SNJ54AS174J pinout, SNJ54AS174J application, or SNJ54AS174J equivalent, key selection criteria include its MIL-PRF-38535 qualification, TTL-compatible logic levels, guaranteed propagation delay (tPLH/tPHL ≤ 9.5 ns), and compatibility with legacy 54AS logic families in high-reliability timing-critical systems.
Technical Context
The SNJ54AS174J implements six independent D-type latches using advanced Schottky TTL (AS) circuitry, with fully buffered clock and clear inputs to suppress noise coupling. Each flip-flop transfers data from D to Q on the positive-going edge of CLK, provided setup (tsu = 4 ns) and hold (th = 1 ns) times are met.
All six outputs are non-inverting and single-ended; unlike the 'AS175B variant, it does not provide complementary (Q/Q̄) outputs. The device features TTL-level input thresholds (VIH = 2 V, VIL = 0.8 V), rail-to-rail VOH/VOL specs under 20 mA load, and is characterized per MIL-STD-883 Class B for high-reliability applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced Schottky TTL (AS), fully compatible with standard TTL interfaces |
| Function | Hex D-type positive-edge-triggered flip-flop with asynchronous clear |
| Max Clock Frequency | 100 MHz - enables high-speed synchronous logic in real-time control subsystems |
| Propagation Delay | tPLH/tPHL ≤ 9.5 ns (VCC = 4.5–5.5 V, CL = 50 pF) - ensures tight timing margins in pipeline stages |
| Output Drive | IOL = 20 mA / IOH = –2 mA - sufficient to drive multiple TTL loads or small PCB traces without buffering |
| Operating Temperature | –55°C to +125°C - qualified for extended-range military and space environments |
| Supply Voltage | VCC = 4.5 V to 5.5 V - stable operation across wide input rail variation in vehicle/avionics power systems |
Pinout & Package
SNJ54AS174J is housed in a hermetically sealed 16-pin Ceramic Dual In-line Package (CDIP-J), rated for high-reliability military use with SNPB (tin-lead) lead finish and no moisture sensitivity level (MSL N/A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 14 | Data (D1–D6) and Output (Q1–Q6) | Independent D-inputs and corresponding non-inverting Q-outputs for six flip-flops; pins 1–6 = D1–D6, pins 10–13, 15–16 = Q1–Q6 |
| 7 | GND | Ground reference for all internal logic and I/O; must be low-impedance connection in high-noise environments |
| 9 | CLK | Common positive-edge clock input - synchronizes all six flip-flops simultaneously |
| 15 | CLR | Asynchronous active-low clear - resets all Q outputs to logic low regardless of clock state |
| 16 | VCC | Power supply input - requires local 0.1 µF ceramic decoupling adjacent to pin per MIL design practice |
Key Features
| Feature | Design Value |
|---|---|
| Fully buffered clock and clear inputs | Prevents false triggering from transient noise on control lines in electrically harsh platforms |
| MIL-PRF-38535 Class B qualification | Guarantees tested parametric performance across full temperature range and lifetime reliability for defense programs |
| Single-rail (non-complementary) outputs | Simplifies PCB routing and reduces loading vs. dual-output variants - ideal for unidirectional register chains |
| 100 MHz operation at –55°C to +125°C | Enables deterministic timing in real-time flight control computers without derating |
| TTL-compatible voltage thresholds | Direct interface with legacy 74LS/74ALS logic without level-shifting in mixed-technology backplanes |
Applications
| Avionics Data Buffering | Spacecraft Telemetry Registers |
|---|---|
Use Scenario: Capturing and holding sensor data (e.g., inertial measurement unit outputs) before serial transmission over MIL-STD-1553 bus. IC Role / Device Role / Timing Role: Hex D-flip-flop acting as parallel-in, parallel-out (PIPO) register synchronized to system master clock. Use Value: Six independent channels allow concurrent capture of multi-axis accelerometer, gyroscope, and temperature readings with sub-10 ns skew. | Use Scenario: Storing housekeeping telemetry (voltage, current, temperature) prior to downlink encoding in LEO satellite payloads. IC Role / Device Role / Timing Role: Radiation-hardened storage element providing latch functionality in command/data handling units. Use Value: CDIP packaging and MIL-PRF-38535 qualification ensure survivability in total ionizing dose (TID) > 100 krad(Si) environments. |
| Missile Guidance Logic | Radar Signal Processing Pipeline |
Use Scenario: Holding target coordinate updates from seeker processor for guidance law computation in tactical missiles. IC Role / Device Role / Timing Role: Synchronous register stage aligning data between asynchronous processing blocks in hardened flight computers. Use Value: 100 MHz clock capability supports update rates up to 10 kHz while maintaining deterministic latency for closed-loop control. | Use Scenario: Implementing fixed-delay taps in digital pulse compression filters within airborne radar front-ends. IC Role / Device Role / Timing Role: Cascaded D-flip-flops forming precise clock-domain-aligned shift register for matched filter implementation. Use Value: Sub-10 ns propagation delay tolerance enables accurate 10 ns binning resolution in time-domain signal correlation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ALS174J | ALS family: lower speed (50 MHz max), lower ICC (19 mA), higher noise margin but slower tPLH/tPHL (≤20 ns) | Better suited for low-power, lower-frequency legacy systems where timing slack exists | Select when power budget is constrained and 100 MHz performance is unnecessary |
| SN74AS174N | Commercial version: same logic, 0°C to 70°C temp range, PDIP package, RoHS-compliant NiPdAu finish | Intended for ground-based test equipment or non-mission-critical industrial controllers | Choose for cost-sensitive prototyping or non-aerospace production where MIL spec is not required |
Compared with SNJ54ALS174J and SN74AS174N, the SNJ54AS174J uniquely combines military temperature range, 100 MHz speed, and CDIP hermeticity - making it irreplaceable in flight-critical timing paths where both performance and environmental robustness are mandatory.
Availability
SNJ54AS174J is available at Aetrix Electronics and suitable for avionics data buffering, spacecraft telemetry registers, missile guidance logic, and radar signal processing pipelines requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SNJ54AS174J 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 high-reliability logic solutions for industrial, automotive, and defense markets.
The SNJ54AS174J belongs to TI's military logic portfolio designed specifically for aerospace and defense applications demanding guaranteed performance under extreme thermal, radiation, and vibration conditions.
FAQ
What is the maximum clock frequency supported by SNJ54AS174J?
The SNJ54AS174J supports a maximum clock frequency of 100 MHz across its full operating temperature range of –55°C to +125°C. This value is based on characterization data per MIL-STD-883 Class B and is not production-tested, but it is guaranteed by TI's military qualification process for use in high-speed synchronous logic designs such as avionics data acquisition systems. The SNJ54AS174J achieves this speed due to its Advanced Schottky TTL architecture and optimized internal propagation paths.
Does SNJ54AS174J provide complementary (Q and Q̄) outputs?
No, the SNJ54AS174J provides only single-rail (non-complementary) outputs - each of the six flip-flops has one Q output, with no associated Q̄ terminal. This distinguishes it from the SNJ54AS175B, which offers dual-rail outputs. The SNJ54AS174J's architecture simplifies PCB layout and reduces fanout loading in applications like parallel data latching where inverted signals are not required.
What package type and lead finish does SNJ54AS174J use?
The SNJ54AS174J uses a 16-pin Ceramic Dual In-line Package (CDIP-J) with tin-lead (SNPB) lead finish. It is hermetically sealed, rated for military temperature range (–55°C to +125°C), and has no moisture sensitivity level (MSL N/A), eliminating reflow concerns. This package is specified in MIL-STD-1835 and supports long-term reliability in high-vacuum or high-humidity operational environments where plastic packages would degrade.
How does SNJ54AS174J differ from SN74AS174N in terms of qualification and use case?
The SNJ54AS174J is a military-qualified part compliant with MIL-PRF-38535 Class B, tested across –55°C to +125°C, and packaged in hermetic CDIP. In contrast, the SN74AS174N is a commercial-grade device rated for 0°C to 70°C, uses plastic PDIP packaging, and carries RoHS-compliant NiPdAu finish. While functionally identical, the SNJ54AS174J is intended for flight hardware and defense systems, whereas the SN74AS174N suits lab equipment or industrial controls where environmental stress is minimal.
What are the absolute maximum ratings for SNJ54AS174J supply voltage and input voltage?
The absolute maximum supply voltage (VCC) for SNJ54AS174J is 7 V, and the absolute maximum input voltage (VI) is also 7 V. Exceeding these values may cause permanent damage. These ratings apply across the full operating temperature range and are defined per JEDEC standards. For reliable operation, SNJ54AS174J must be operated within the recommended range of VCC = 4.5 V to 5.5 V and VI = 0 V to VCC, as specified in the SDAS207E datasheet.
SNJ54AS174J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54AS
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 11.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 2mA, 20mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 45 mA
- Input Capacitance:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-CDIP
SNJ54AS174J FAQ
1.How can I place an order for SNJ54AS174J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54AS174J 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 SNJ54AS174J reliable?
The price and inventory of SNJ54AS174J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54AS174J is usually 5 days.
3.What payment methods are accepted for SNJ54AS174J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54AS174J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54AS174J?
SNJ54AS174J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54AS174J 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 SNJ54AS174J?
For technical support, including SNJ54AS174J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54AS174J requirements.
6.How does Aetrix verify that SNJ54AS174J is sourced from the original manufacturer or authorized distributors?
All SNJ54AS174J 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 SNJ54AS174J meets industry standards.
7.What is the process for return or replacement of SNJ54AS174J?
All SNJ54AS174J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54AS174J, 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 SNJ54AS174J part is unused and in its original packaging.
Return procedure for SNJ54AS174J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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