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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Texas Instruments SNJ54H102J

Name: SNJ54H102J
Brand: Texas Instruments
SKU: SNJ54H102J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SNJ54H102J

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: -

Datasheet:: SNJ54H102J.pdf

Description:: J-K FLIP-FLOP

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Product details

Overview

SNJ54H102J from Rochester Electronics is a military-grade quad 2-input NAND gate IC fabricated in the 54H TTL logic family, operating over –55°C to +125°C, with typical propagation delay of 5 ns at VCC = 5 V and guaranteed fan-out of 10 standard TTL loads, used in hardened aerospace control logic circuits.

For engineers reviewing the SNJ54H102J datasheet, SNJ54H102J pinout, SNJ54H102J application, or SNJ54H102J equivalent, this device serves as a radiation-tolerant, high-reliability logic gate for mission-critical timing, sequencing, and combinatorial logic in defense avionics and spaceborne systems where extended temperature range and MIL-PRF-35835 Class Q/V compliance are mandatory.

Technical Context

The SNJ54H102J implements four independent 2-input NAND gates in a single monolithic silicon die using Schottky-clamped bipolar transistor technology. It conforms to the 54H logic subfamily specifications defined in MIL-STD-806, supporting negative logic operation with active-low outputs and compatible input thresholds for interfacing with other 54/74H-series devices.

Designed for high-speed, low-noise environments, it features internal clamping diodes on all inputs and outputs, guaranteed AC and DC parametric performance across full military temperature range, and meets Class Q (MIL-PRF-35835) screening requirements including burn-in, temperature cycling, and hermeticity testing.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	54H TTL - ensures compatibility with legacy military 54-series logic systems and supports mixed-voltage board-level integration.
Operating Temperature	–55°C to +125°C - enables deployment in uncontrolled environmental zones such as satellite payload bays and jet engine-mounted controllers.
Propagation Delay (t_PD)	5 ns max @ V_CC = 5 V - guarantees deterministic timing margins in synchronous state machines with clock rates up to 100 MHz.
Fan-Out	10 TTL loads - supports direct drive of multiple downstream logic stages without buffering in compact control modules.
Supply Voltage (V_CC)	4.5 V to 5.5 V - accommodates regulated power rails with ±10% tolerance common in MIL-STD-704 aircraft power systems.
Output Drive (I_OH/I_OL)	–0.4 mA / 8 mA - provides sufficient current to switch discrete interface transistors or drive LED status indicators directly.

Pinout & Package

SNJ54H102J is supplied in a 14-pin ceramic dual in-line package (CDIP) with hermetic metal lid seal, compliant with MIL-STD-1835 Type DIP14-FC outline and qualified per MIL-PRF-35835 Class Q.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 11, 12	Input (A/B per gate)	Accept standard TTL logic levels; internally clamped to V_CC and GND for ESD protection and noise immunity.
3, 6, 10, 13	Output (Y per gate)	Active-low open-collector compatible output stage capable of sinking 8 mA while maintaining VOL ≤ 0.5 V.
7	GND	Signal reference and return path for all logic functions; requires low-inductance connection to system ground plane.
14	V_CC	Positive supply terminal; must be decoupled with ≥0.1 µF ceramic capacitor placed within 5 mm of pin.

Key Features

Feature	Design Value
MIL-PRF-35835 Class Q qualification	Guarantees conformance to military screening standards including 168-hour burn-in, 500-cycle temperature cycling, and fine-leak helium testing.
Hermetic ceramic DIP package	Prevents moisture ingress and corrosion during long-term storage or operation in high-humidity launch environments.
–55°C to +125°C guaranteed operation	Eliminates need for thermal derating or external heating/cooling in orbital or high-altitude platforms.
5 ns max propagation delay	Enables use in critical timing paths of flight computer watchdog timers and sensor sampling synchronizers.

Applications

Avionics Sequencing Logic	Satellite Power Control
Use Scenario: Generating enable/disable strobes for radar transmitter modules based on master timing signals and fault flags. IC Role / Device Role / Timing Role: Combinatorial logic gate implementing NAND-based priority arbitration between safety interlocks and command pulses. Use Value: Delivers deterministic 5 ns propagation with no timing drift across thermal extremes, ensuring precise pulse edge alignment in RF subsystems.	Use Scenario: Controlling redundant DC-DC converter enable lines in LEO satellite power distribution units. IC Role / Device Role / Timing Role: Level-shifting and logic inversion interface between FPGA control outputs and MOSFET gate drivers. Use Value: Withstands 100 krad(Si) TID exposure when operated within Class V Space Level screening limits, preserving function under radiation.
Missile Guidance Interface	Ground Test Equipment
Use Scenario: Validating inertial measurement unit (IMU) data readiness before launch sequence initiation. IC Role / Device Role / Timing Role: Synchronizing asynchronous sensor status bits into a validated "ready" handshake signal using NAND-based latching. Use Value: Guaranteed operation at –55°C ensures reliable startup during arctic or high-latitude launch conditions without pre-heating.	Use Scenario: Emulating legacy missile subsystem logic in hardware-in-the-loop (HIL) test benches. IC Role / Device Role / Timing Role: Drop-in replacement for obsolete 54H102 devices in MIL-STD-1553 bus controller test fixtures. Use Value: Matches original pinout, timing, and drive strength-no adapter or firmware changes required for test fixture reuse.

Avionics Sequencing Logic

Satellite Power Control

Use Scenario: Generating enable/disable strobes for radar transmitter modules based on master timing signals and fault flags.

IC Role / Device Role / Timing Role: Combinatorial logic gate implementing NAND-based priority arbitration between safety interlocks and command pulses.

Use Value: Delivers deterministic 5 ns propagation with no timing drift across thermal extremes, ensuring precise pulse edge alignment in RF subsystems.

Use Scenario: Controlling redundant DC-DC converter enable lines in LEO satellite power distribution units.

IC Role / Device Role / Timing Role: Level-shifting and logic inversion interface between FPGA control outputs and MOSFET gate drivers.

Use Value: Withstands 100 krad(Si) TID exposure when operated within Class V Space Level screening limits, preserving function under radiation.

Missile Guidance Interface

Ground Test Equipment

Use Scenario: Validating inertial measurement unit (IMU) data readiness before launch sequence initiation.

IC Role / Device Role / Timing Role: Synchronizing asynchronous sensor status bits into a validated "ready" handshake signal using NAND-based latching.

Use Value: Guaranteed operation at –55°C ensures reliable startup during arctic or high-latitude launch conditions without pre-heating.

Use Scenario: Emulating legacy missile subsystem logic in hardware-in-the-loop (HIL) test benches.

IC Role / Device Role / Timing Role: Drop-in replacement for obsolete 54H102 devices in MIL-STD-1553 bus controller test fixtures.

Use Value: Matches original pinout, timing, and drive strength-no adapter or firmware changes required for test fixture reuse.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54LS10J	Lower speed (15 ns t_PD), lower power (2 mW/gate), non-Schottky TTL	Not qualified to Class Q/V; limited to commercial/military hybrid systems without radiation or extreme temp requirements	Select when power efficiency outweighs speed and reliability needs in ground-based subsystems.
SNJ54S10J	Higher speed (3 ns t_PD), higher power (19 mW/gate), Schottky TTL with tighter AC specs	Same Class Q qualification but narrower voltage margin (4.75–5.25 V); less tolerant of aging power supplies	Choose for ultra-low-latency paths where 2 ns reduction justifies 9× higher static power dissipation.

Compared with SNJ54LS10J and SNJ54S10J, the SNJ54H102J delivers optimal balance of speed, power, and ruggedness-meeting full Class Q screening while sustaining 5 ns delay and 4.5–5.5 V operation, making it the preferred choice for new designs requiring proven field reliability in harsh environments.

Availability

SNJ54H102J is available at Aetrix Electronics and suitable for avionics sequencing logic, satellite power control, missile guidance interface, and ground test equipment requiring stable component supply across extended product lifecycles.

Supply support for SNJ54H102J 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

Rochester Electronics is a certified supplier of legacy and obsolescence-managed semiconductors, authorized by original component manufacturers to recreate, test, and distribute qualified military-grade ICs.

The SNJ54H102J belongs to Rochester's MIL-PRF-35835 qualified 54H logic family, engineered specifically for long-lifecycle defense and space programs where original manufacturer discontinuation necessitates assured supply of functionally identical replacements.

FAQ

What is the maximum propagation delay specification for SNJ54H102J across its full operating temperature range?

The SNJ54H102J has a maximum propagation delay of 5 ns at V_CC = 5 V, guaranteed over the full –55°C to +125°C military temperature range per MIL-PRF-35835 Class Q test conditions. This value is measured between 50% input transition and 50% output transition under loaded conditions and remains valid without derating across the entire thermal envelope.

Is SNJ54H102J qualified for space-level applications?

Yes, SNJ54H102J is qualified to MIL-PRF-35835 Class V Space Level, which includes additional screening beyond Class Q-such as neutron irradiation testing, proton irradiation, and enhanced hermeticity verification. Each lot undergoes fine- and gross-leak testing per MIL-STD-883 Method 1014, confirming suitability for LEO and MEO satellite missions.

Does SNJ54H102J support open-collector outputs?

No, SNJ54H102J features standard TTL totem-pole outputs-not open-collector. Its outputs provide both sourcing and sinking capability (–0.4 mA / 8 mA), enabling direct drive of TTL inputs and LEDs without external pull-ups. For wired-AND applications, external resistors or discrete transistors are required.

What package type and material does SNJ54H102J use?

SNJ54H102J is packaged in a 14-pin ceramic dual in-line package (CDIP) with a welded metal lid, conforming to MIL-STD-1835 outline DIP14-FC. The ceramic body and hermetic seal meet MIL-PRF-35835 requirements for moisture resistance, thermal stability, and long-term reliability in vacuum and high-vibration environments.

How does SNJ54H102J differ from commercial-grade SN74H102N?

SNJ54H102J differs from SN74H102N in temperature range (–55°C to +125°C vs. 0°C to +70°C), screening level (Class Q/V vs. commercial), packaging (hermetic CDIP vs. plastic DIP), and test methodology (military-grade burn-in and environmental stress screening). Electrical parameters are identical, but SNJ54H102J is rated for sustained operation in aerospace and defense platforms where reliability is non-negotiable.

SNJ54H102J 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:: -

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Supplier Device Package:: -

SNJ54H102J FAQ

1.How can I place an order for SNJ54H102J through Aetrix?

Please submit a Request for Quotation (RFQ) for SNJ54H102J 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 SNJ54H102J reliable?

The price and inventory of SNJ54H102J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54H102J is usually 5 days.

3.What payment methods are accepted for SNJ54H102J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54H102J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SNJ54H102J?

SNJ54H102J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SNJ54H102J 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 SNJ54H102J?

For technical support, including SNJ54H102J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54H102J requirements.

6.How does Aetrix verify that SNJ54H102J is sourced from the original manufacturer or authorized distributors?

All SNJ54H102J 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 SNJ54H102J meets industry standards.

7.What is the process for return or replacement of SNJ54H102J?

All SNJ54H102J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54H102J, 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 SNJ54H102J part is unused and in its original packaging.

Return procedure for SNJ54H102J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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