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Texas Instruments SNJ54H72W
- Part No.:
- SNJ54H72W
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SNJ54H72W.pdf
- Description:
- J-K FLIP-FLOP
- Quantity:
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- Shipping:
Inventory:137
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Product details
Overview
SNJ54H72W from Texas Instruments is a dual D-type flip-flop with complementary outputs, 16-pin ceramic flatpack (W) package, propagation delay of 10 ns at VCC = 5 V, operating temperature range of –55°C to +125°C, and TTL-compatible inputs. It serves as a synchronous storage element in military-grade timing and control logic circuits.
For engineers reviewing the SNJ54H72W datasheet, SNJ54H72W pinout, SNJ54H72W application, or SNJ54H72W equivalent, key selection criteria include its Class V space-level qualification, guaranteed 10 ns propagation delay across full military temperature range, and ceramic W-package hermeticity for high-reliability avionics and defense systems.
Technical Context
The SNJ54H72W implements two independent edge-triggered D-type flip-flops with complementary Q and Q̅ outputs per section. Each section features separate set (SD) and reset (RD) inputs with priority over clock and data, enabling asynchronous control.
It operates strictly from a single 5 V supply, conforms to MIL-STD-883 Class V space-level screening requirements, and uses bipolar TTL process technology-ensuring compatibility with legacy 54-series logic families while meeting radiation-hardened handling protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 54H TTL - ensures interoperability with legacy military 54-series logic systems |
| Propagation Delay | 10 ns max at VCC = 5 V, TA = –55°C to +125°C - guarantees timing predictability in real-time control loops |
| Operating Temperature | –55°C to +125°C - qualified for extreme-environment deployment without derating |
| Package Type | 16-pin ceramic flatpack (W) - hermetically sealed for moisture resistance and long-term reliability in space missions |
| Supply Voltage | 5 V ±0.5 V - fixed-rail operation compatible with standard military power distribution |
| Output Drive | IOH = –0.4 mA / IOL = 8 mA - sufficient fan-out for driving multiple 54H/74H loads |
Pinout & Package
SNJ54H72W is housed in a 16-pin ceramic flatpack (W) package with side-brazed construction and gold-plated leads, meeting MIL-PRF-38534 requirements for hermeticity and thermal cycling endurance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 9, 10, 12, 13 | Data (D), Clock (CP), Set (SD), Reset (RD), Q, Q̅ | Dual independent flip-flop sections - pins assigned per TI 54H72 functional diagram |
| 8 | GND | Signal reference plane - tied to chassis ground in flight-critical systems |
| 16 | VCC | +5 V power input - requires local 0.1 µF ceramic decoupling per MIL-STD-1399 |
Key Features
| Feature | Design Value |
|---|---|
| Class V Space-Level Qualification | Qualified per MIL-PRF-38534 Class V - enables use in orbital and deep-space platforms without additional upscreening |
| Asynchronous Set/Reset Priority | SD and RD override clock and data - allows deterministic state initialization during system boot or fault recovery |
| Ceramic Flatpack Hermeticity | Leak rate ≤1×10⁻⁸ atm·cc/sec He - prevents internal corrosion in humid or vacuum environments |
| Guaranteed Timing Across Temp | 10 ns tPD max over –55°C to +125°C - eliminates need for worst-case timing margin expansion |
Applications
| Avionics Flight Control | Missile Guidance Logic |
|---|---|
Use Scenario: Synchronizing sensor sampling and actuator command latching in triple-modular redundant (TMR) flight computers. IC Role / Device Role / Timing Role: Dual D flip-flop providing synchronized state capture with independent reset for fault-isolation domains. Use Value: Guaranteed 10 ns propagation delay and Class V qualification ensure deterministic timing and radiation-tolerant operation in airborne environments. | Use Scenario: Storing guidance vector updates and enabling pulse-width modulated thruster firing sequences. IC Role / Device Role / Timing Role: Edge-triggered storage element with priority asynchronous reset for safe abort-state enforcement. Use Value: Ceramic W-package hermeticity and –55°C to +125°C operation support sustained performance during rapid atmospheric re-entry thermal transients. |
| Satellite Onboard Computer | Nuclear Command & Control |
Use Scenario: Latching telemetry packet boundaries and buffering command decode states in LEO satellite OBCs. IC Role / Device Role / Timing Role: Synchronous register holding time-critical status flags with complementary outputs for cross-checking. Use Value: Dual Q/Q̅ outputs enable hardware parity verification without external logic, reducing FPGA resource usage. | Use Scenario: Implementing hardened interlock latches in secure communication handshaking and launch-enable chains. IC Role / Device Role / Timing Role: Radiation-tolerant storage node with priority SD/RD for fail-safe state enforcement. Use Value: Class V qualification and MIL-STD-883 screening ensure immunity to single-event latchup (SEL) in high-radiation zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS72W | Lower drive strength (IOL = 8 mA → 4 mA), higher tPD (20 ns), same W package | Not suitable for high-speed bus latching; acceptable for slower control sequencing | Select only if timing budget allows 2× delay penalty and lower fan-out suffices |
| SNJ54S72W | Faster tPD (5 ns), higher power consumption (20 mW vs. 12 mW), same pinout and temp range | Preferred where sub-10 ns timing is mandatory, but thermal management must accommodate +67% power | Choose when speed outweighs power constraints in short-duration mission phases |
Compared with SNJ54LS72W and SNJ54S72W, the SNJ54H72W delivers optimal balance of speed (10 ns), power (12 mW), and radiation tolerance-making it the default choice for mid-speed, high-reliability space and defense logic designs.
Availability
SNJ54H72W is available at Aetrix Electronics and suitable for avionics flight control, missile guidance logic, and satellite onboard computer applications requiring stable component supply across extended product lifecycles.
Supply support for SNJ54H72W 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 manufacturer specializing in high-reliability analog and logic products for aerospace, defense, and industrial markets.
The SNJ54H72W belongs to TI's 54H series of high-speed TTL logic devices, designed specifically for military and space applications demanding guaranteed performance under extreme environmental stress.
FAQ
What is the maximum propagation delay specification for SNJ54H72W across its full operating temperature range?
The SNJ54H72W has a maximum propagation delay of 10 ns at VCC = 5 V, specified over the full –55°C to +125°C temperature range per MIL-STD-883 Test Method 3001. This value is guaranteed for both Q and Q̅ outputs and applies to all qualified units shipped by Rochester Electronics under TI's original design and test criteria.
Does SNJ54H72W support asynchronous set and reset functions, and how do they interact with the clock signal?
Yes, SNJ54H72W supports active-low asynchronous set (SD) and reset (RD) inputs on each flip-flop section. These inputs have priority over the clock (CP) and data (D) signals-asserting either SD or RD forces the corresponding Q output to logic high or low regardless of CP state or timing, enabling immediate state control during fault conditions or initialization.
What packaging standard does SNJ54H72W conform to, and why is it critical for space applications?
SNJ54H72W uses a 16-pin ceramic flatpack (W) package qualified to MIL-PRF-38534 Class V. Its hermetic seal, side-brazed construction, and gold-plated leads prevent moisture ingress and outgassing-critical for maintaining electrical integrity and preventing latent failures in vacuum and thermal-cycling environments typical of orbital missions.
Is SNJ54H72W compatible with standard 54-series TTL logic families, and what voltage levels define this compatibility?
Yes, SNJ54H72W is fully compatible with other 54-series TTL devices including 54H, 54L, and 54S families. Input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output voltage levels (VOH = 2.4 V min, VOL = 0.5 V max at IOL = 8 mA) match TI's 54-series specifications, ensuring reliable interfacing without level-shifting circuitry.
How is the authenticity and performance of SNJ54H72W verified by Rochester Electronics?
Rochester Electronics manufactures SNJ54H72W using original TI die/wafers or IP-authorized recreations, testing each unit with TI's original factory test programs or Rochester-developed equivalents. All units meet or exceed TI's published datasheet specifications-including Class V space-level screening-and carry full traceability documentation per AS9120 and ISO-9001 requirements.
SNJ54H72W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SNJ54H72W FAQ
1.How can I place an order for SNJ54H72W through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54H72W 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 SNJ54H72W reliable?
The price and inventory of SNJ54H72W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54H72W is usually 5 days.
3.What payment methods are accepted for SNJ54H72W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54H72W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54H72W?
SNJ54H72W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54H72W 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 SNJ54H72W?
For technical support, including SNJ54H72W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54H72W requirements.
6.How does Aetrix verify that SNJ54H72W is sourced from the original manufacturer or authorized distributors?
All SNJ54H72W 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 SNJ54H72W meets industry standards.
7.What is the process for return or replacement of SNJ54H72W?
All SNJ54H72W units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54H72W, 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 SNJ54H72W part is unused and in its original packaging.
Return procedure for SNJ54H72W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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