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Texas Instruments SNJ54ABT374J
- Part No.:
- SNJ54ABT374J
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SNJ54ABT374J.pdf
- Description:
- 54ABT374 OCTAL EDGE-TRIGGERED D-
- Quantity:
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Inventory:3,198
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Product details
Overview
SNJ54ABT374J from Texas Instruments is a military-grade octal edge-triggered D-type flip-flop with 3-state outputs, designed for high-speed bus interface and register applications in harsh environments. It operates across –55°C to 125°C, delivers ±32-mA high-drive outputs, supports up to 150-MHz clock frequency, and features low ground bounce (<1 V) at 5 V. It is used in avionics data buffers and radiation-tolerant I/O port designs.
For engineers reviewing the SNJ54ABT374J datasheet, SNJ54ABT374J pinout, SNJ54ABT374J application, or SNJ54ABT374J equivalent, key selection criteria include its CDIP (J) package compatibility, military temperature range, 3-state output control timing (tPZH/tPLZ < 4.7 ns), and high-current drive capability for driving capacitive backplanes without external termination.
Technical Context
This device implements eight independent positive-edge-triggered D flip-flops with asynchronous 3-state output enable (OE). Each flip-flop latches D-input data on the rising edge of CLK while OE remains low; when OE is high, all Q outputs enter high-impedance state without affecting internal storage.
The SNJ54ABT374J uses EPIC-IIB BiCMOS process technology to achieve low power dissipation and latch-up immunity exceeding 500 mA per JEDEC JESD-17. Its output structure supports bidirectional bus driving with –32-mA IOH and 64-mA IOL, enabling direct connection to TTL/CMOS loads without pull-ups or interface logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type flip-flop with 3-state outputs - enables synchronous data latching and bus isolation in shared-data-path systems. |
| Clock Frequency | Up to 150 MHz - supports high-throughput digital control and test equipment timing requirements. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS systems and ensures stable operation under rail variation. |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads (e.g., >50 pF buses) without signal degradation or added buffering. |
| Propagation Delay | tPLH/tPHL ≤ 6.6 ns (CLK→Q) - guarantees sub-7-ns timing margin for 150-MHz synchronous designs. |
| Enable Timing | tPZH/tPLZ ≤ 4.7 ns (OE→Q) - allows fast bus turnaround in multiplexed memory or peripheral interfaces. |
| Operating Temperature | –55°C to 125°C - qualified for aerospace, defense, and downhole industrial applications requiring extended thermal reliability. |
Pinout & Package
Ceramic Dual-In-Line Package (CDIP), 20-pin, through-hole mounting. Pin 1 index located at top-left corner with notch or dot marking. Package height ≤ 4.95 mm, body width 7.62 mm, lead spacing 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data inputs (D1–D8) | Asynchronous parallel data inputs synchronized to CLK rising edge; must be stable during setup/hold windows. |
| 9 | Output enable (OE) | Active-low control: OE = L enables Q outputs; OE = H forces all Q into high-impedance state regardless of CLK/D state. |
| 10 | GND | Ground reference for all internal circuitry and output drivers; requires low-inductance connection to minimize ground bounce. |
| 11 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor (0.1 µF ceramic + 10 µF tantalum) required within 10 mm of pin. |
| 12, 13, 14, 15, 16, 17, 18, 19 | Outputs (Q1–Q8) | 3-state buffered outputs; high-impedance state isolates bus lines during data arbitration or standby modes. |
| 20 | CLK | Global clock input; positive-edge sensitive; requires clean, monotonic transition with <5 ns/V input slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Reduces static power consumption while maintaining TTL-compatible speed and drive strength. |
| Latch-Up Immunity | Exceeds 500 mA per JEDEC JESD-17 - eliminates risk of destructive latch-up in high-noise or ESD-prone systems. |
| Output Ground Bounce | Typical VOLP < 1 V at VCC = 5 V - preserves signal integrity during simultaneous output switching on shared ground planes. |
| ESD Protection | ≥2000 V per MIL-STD-883 Method 3015 - withstands handling and board-level ESD events without functional degradation. |
| High-Drive Outputs | –32 mA IOH / 64 mA IOL - eliminates need for external bus transceivers in legacy 5-V system upgrades. |
Applications
| Avionics Data Buffering | Military I/O Port Expansion |
|---|---|
|
Use Scenario: Interfacing flight control microprocessors with analog-to-digital converters and sensor multiplexers over shared 5-V backplanes. IC Role / Device Role / Timing Role: Synchronizes asynchronous sensor data into clock-aligned registers and isolates bus segments during fault recovery sequences. Use Value: Enables deterministic sampling at 150 MHz while preventing bus contention during hot-swap or reset events via OE-controlled 3-state outputs. |
Use Scenario: Expanding GPIO count on ruggedized vehicle control units operating in –40°C to 85°C commercial variants and –55°C to 125°C military variants. IC Role / Device Role / Timing Role: Acts as bidirectional bus driver between processor local bus and peripheral modules (CAN transceivers, discrete I/O cards). Use Value: Delivers 64-mA sink current to drive LED status indicators and relay drivers directly, reducing component count and PCB area. |
| Radiation-Tolerant Register File | Test Equipment Pattern Generator |
|
Use Scenario: Storing configuration bits and calibration coefficients in satellite subsystems exposed to total ionizing dose (TID) >100 krad(Si). IC Role / Device Role / Timing Role: Provides nonvolatile-like data retention using latch-based storage with periodic refresh via system clock. Use Value: Maintains data integrity under single-event upsets (SEUs) due to hardened BiCMOS design and absence of SRAM cells. |
Use Scenario: Generating precise, synchronized stimulus waveforms in automated test equipment (ATE) for ASIC validation. IC Role / Device Role / Timing Role: Captures pattern vectors from FPGA sequencer and presents them simultaneously to DUT pins with sub-7-ns skew. Use Value: Achieves <100-ps inter-output skew across all eight channels, critical for high-speed digital boundary-scan compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT374ADW | Commercial temperature range (–40°C to 85°C); SOIC-20 package; RoHS-compliant NiPdAu finish. | Not qualified for military/aerospace use; lacks JESD-17 latch-up rating and MIL-STD-883 screening. | Select for cost-sensitive industrial controls where extended temperature and radiation tolerance are not required. |
| SNJ54ABT374FK | LCCC-20 ceramic package; same military temp range and electrical specs; different mechanical footprint and thermal resistance (θJA = N/A). | Better high-frequency performance due to lower parasitic inductance; suited for RF-adjacent digital subsystems. | Choose when board space is constrained and superior EMI immunity or higher reflow survivability is needed. |
Compared with SN74ABT374ADW, SNJ54ABT374J offers guaranteed operation at –55°C and 125°C with enhanced latch-up immunity, while SNJ54ABT374FK provides superior high-frequency signal integrity in compact LCCC form - making SNJ54ABT374J optimal for through-hole-reliant, thermally demanding legacy military platforms.
Availability
SNJ54ABT374J is available at Aetrix Electronics and suitable for avionics data buffering, military I/O port expansion, and radiation-tolerant register file applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SNJ54ABT374J 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 with over 50 years of aerospace and defense component heritage.
The SNJ54ABT374J belongs to TI's military-grade ABT logic family, engineered for high-speed, low-power, 3-state bus interface in mission-critical systems where thermal resilience and latch-up immunity are non-negotiable.
FAQ
What is the maximum clock frequency supported by SNJ54ABT374J?
The SNJ54ABT374J supports a maximum clock frequency of 150 MHz across its full operating temperature range (–55°C to 125°C). This specification is verified under recommended conditions (VCC = 4.5 V to 5.5 V, CL = 50 pF), and timing margins remain valid even at temperature extremes due to TI's military-grade characterization. The SNJ54ABT374J achieves this performance using EPIC-IIB BiCMOS process technology.
Does SNJ54ABT374J require external pull-up resistors on the OE pin?
Yes - to ensure the outputs remain in high-impedance state during power-up or power-down, OE should be tied to VCC through a pull-up resistor. The minimum value depends on the current-sinking capability of the driving source; TI recommends verifying against the specific driver's IOH spec. This requirement applies uniquely to SNJ54ABT374J and other members of the 54ABT logic family to prevent bus contention at power transition.
Can SNJ54ABT374J be used as a drop-in replacement for SN74ABT374A?
No - SNJ54ABT374J is not a drop-in replacement for SN74ABT374A. While both share identical logic functionality and pinout, SNJ54ABT374J uses a ceramic DIP (J) package with tin-lead leads and is characterized for –55°C to 125°C, whereas SN74ABT374A uses RoHS-compliant plastic packages (SOIC, TSSOP) rated only to –40°C to 85°C. PCB layout, thermal management, and qualification requirements differ significantly.
What is the absolute maximum supply voltage for SNJ54ABT374J?
The absolute maximum supply voltage for SNJ54ABT374J is 7 V, as specified in the Absolute Maximum Ratings table. Operation above 5.5 V (recommended max) risks permanent damage even if within the 7-V limit. This rating applies strictly to transient conditions; continuous operation must remain within 4.5 V to 5.5 V to ensure timing compliance, latch-up immunity, and long-term reliability per MIL-PRF-38535 standards.
How does SNJ54ABT374J handle unused inputs?
Unused inputs on SNJ54ABT374J must be held high or low to prevent floating states that could cause excessive current draw or metastability. TI explicitly specifies this in the Recommended Operating Conditions note: "Unused inputs must be held high or low." Leaving inputs unconnected violates the device's DC and AC specifications and may compromise noise immunity, especially in high-radiation or high-EMI environments where SNJ54ABT374J is typically deployed.
SNJ54ABT374J 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:
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- Operating Temperature:
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- Grade:
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- Qualification:
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- Mounting Type:
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- Supplier Device Package:
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SNJ54ABT374J FAQ
1.How can I place an order for SNJ54ABT374J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ABT374J 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 SNJ54ABT374J reliable?
The price and inventory of SNJ54ABT374J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ABT374J is usually 5 days.
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SNJ54ABT374J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ABT374J 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 SNJ54ABT374J?
For technical support, including SNJ54ABT374J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ABT374J requirements.
6.How does Aetrix verify that SNJ54ABT374J is sourced from the original manufacturer or authorized distributors?
All SNJ54ABT374J 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 SNJ54ABT374J meets industry standards.
7.What is the process for return or replacement of SNJ54ABT374J?
All SNJ54ABT374J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ABT374J, 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 SNJ54ABT374J part is unused and in its original packaging.
Return procedure for SNJ54ABT374J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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