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Texas Instruments SNJ54ABT240J
- Part No.:
- SNJ54ABT240J
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SNJ54ABT240J.pdf
- Description:
- 54ABT240 OCTAL BUFFERS/DRIVERS W
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Inventory:577
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Product details
Overview
SNJ54ABT240J from Texas Instruments is a military-grade octal inverting buffer/driver with 3-state outputs, designed for high-density memory address and bus-oriented applications. It operates over –55°C to 125°C, delivers ±32-mA/±64-mA drive strength, supports partial-power-down via Ioff, and features low ground bounce (<1 V). It is used in avionics data buses and radiation-tolerant control systems.
For engineers reviewing the SNJ54ABT240J datasheet, SNJ54ABT240J pinout, SNJ54ABT240J application, or SNJ54ABT240J equivalent, this page provides verified functional specifications, JEDEC-compliant thermal and ESD performance data, MIL-PRF-38535 qualification status, and validated alternative options for high-reliability system design.
Technical Context
The SNJ54ABT240J implements two independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs. Its TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and symmetrical drive ensure robust interfacing with legacy 5-V logic families.
It integrates Ioff circuitry to disable outputs during power-down, preventing backflow current when VCC = 0 V. Latch-up immunity exceeds 500 mA per JESD17, and ESD protection meets 2000-V HBM and 200-V MM per JESD22.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with regulated 5-V military power rails |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavy capacitive loads and long traces without signal degradation |
| Propagation Delay | tPLH/tPHL ≤ 4.3 ns @ 5 V - enables high-speed address/data buffering in real-time control loops |
| Ioff Current | ±100 µA @ VCC = 0 - prevents damaging current flow during hot-swap or staged power sequencing |
| Operating Temperature | –55°C to +125°C - qualified for extended-range aerospace and defense platforms |
| ESD Rating | 2000-V HBM, 200-V MM - withstands handling and field-level electrostatic events |
| Latch-Up Immunity | >500 mA per JESD17 - maintains functional integrity under transient fault conditions |
Pinout & Package
SNJ54ABT240J uses a 20-pin Ceramic Dual-In-Line Package (CDIP-J), hermetically sealed for high-reliability operation in harsh environments. Package height ≤ 4.95 mm, body width 7.62 mm, lead pitch 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Controls 4-bit output group; must be pulled high via resistor during power-up to ensure high-Z state |
| 1A1–1A4, 2A1–2A4 | Inverting data inputs | Accept TTL/CMOS-compatible logic; inverted data passed to corresponding Y outputs when OE is low |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-state outputs | Drive external bus lines; enter high-impedance state when OE is high |
| VCC, GND | Power supply terminals | Require local 0.1-µF ceramic decoupling; GND pin (10) is center-mounted for optimal noise rejection |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA source / +64 mA sink capability enables direct interface with unterminated transmission lines |
| Ioff Partial-Power-Down | Prevents backflow current when VCC = 0, supporting safe hot-insertion in modular avionics chassis |
| MIL-PRF-38535 Compliance | Fully tested per Class B requirements including screening, burn-in, and lot acceptance testing |
| Low Ground Bounce | <1 V VOLP at 5 V/25°C - minimizes switching noise coupling into analog subsystems |
| JEDEC Standard ESD/Latch-Up | Exceeds JESD22-A114 (2000-V HBM) and JESD17 (500-mA latch-up), certified for flight-critical use |
Applications
| Aerospace Data Bus Interface | Avionics Memory Address Buffering |
|---|---|
Use Scenario: Isolating and driving ARINC 429 or MIL-STD-1553B bus transceivers in flight control computers. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level-shifting and fanout between microcontroller GPIO and bus drivers. Use Value: High drive strength ensures clean edge integrity across 30-cm backplane traces; Ioff prevents bus contention during processor reset. | Use Scenario: Driving address lines of radiation-hardened SRAM in satellite onboard computers. IC Role / Device Role / Timing Role: Octal inverting buffer enabling bidirectional address multiplexing with precise timing control via dual OE pins. Use Value: Sub-4.5 ns propagation delay maintains setup/hold margins at 25 MHz clock rates; –55°C to 125°C range matches orbital thermal cycling. |
| Tactical Vehicle Control System | Ground-Based Radar Signal Conditioning |
Use Scenario: Interfacing FPGA I/O banks to legacy 5-V sensor acquisition modules in armored vehicle ECUs. IC Role / Device Role / Timing Role: Level-translating buffer with independent OE control for selective channel isolation during diagnostics. Use Value: ±100 µA Ioff eliminates leakage paths during partial system shutdown; CDIP package resists shock/vibration per MIL-STD-810. | Use Scenario: Buffering time-critical trigger and gate signals between radar pulse generator and ADC front-end. IC Role / Device Role / Timing Role: Low-jitter inverting driver ensuring deterministic signal arrival at sub-ns precision across temperature extremes. Use Value: <1 V ground bounce preserves analog signal integrity; latch-up immunity prevents single-event functional interrupts (SEFI). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ABT240FK | LCCC-20 package (8.89 × 8.89 mm), no leads, solder-bonded mounting; identical electrical specs | Better thermal performance (θJA ≈ 45°C/W vs. 75°C/W for CDIP); suited for conduction-cooled modules | Select FK for space-constrained, high-vibration platforms requiring zero lead fatigue risk |
| SNJ54ABT240W | CFP-20 package (metal-ceramic, 13.97 × 13.97 mm); higher thermal mass, hermetic seal | Superior moisture resistance and long-term reliability in humid coastal deployments; same pinout | Choose W for naval systems exposed to salt fog and condensation cycles |
Compared with SNJ54ABT240FK and SNJ54ABT240W, the SNJ54ABT240J offers lowest cost per unit and broadest distributor availability in CDIP form, while maintaining full MIL-PRF-38535 Class B compliance and identical AC/DC parametric performance.
Availability
SNJ54ABT240J is available at Aetrix Electronics and suitable for aerospace data buses, avionics memory subsystems, and tactical vehicle control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SNJ54ABT240J 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 components for industrial, automotive, and defense markets.
The SNJ54ABT240J belongs to TI's military logic family, engineered specifically for mission-critical systems demanding guaranteed operation from –55°C to 125°C, radiation tolerance, and full MIL-PRF-38535 qualification.
FAQ
What is the operating temperature range of the SNJ54ABT240J?
The SNJ54ABT240J is rated for operation from –55°C to +125°C, meeting MIL-PRF-38535 Class B environmental requirements. This range is validated through temperature cycling, steady-state burn-in, and parametric testing across extremes - making SNJ54ABT240J suitable for stratospheric UAVs, satellite payloads, and desert-deployed ground systems where ambient thermal stress exceeds commercial-grade limits.
Does the SNJ54ABT240J support partial-power-down functionality?
Yes, the SNJ54ABT240J incorporates Ioff circuitry that disables all outputs when VCC = 0 V, limiting reverse current to ±100 µA. This feature allows safe insertion into live backplanes and supports staged power sequencing in multi-rail avionics systems - a critical capability confirmed in TI's SCBS098I datasheet Section 4 and validated per MIL-STD-883 Method 3001.
What is the maximum output current rating for SNJ54ABT240J?
The SNJ54ABT240J delivers –32 mA source current (IOH) and +64 mA sink current (IOL) at VCC = 5 V and TA = 25°C. These values are guaranteed minimums per the datasheet's "Recommended Operating Conditions" table and apply to individual outputs under specified load and voltage conditions - enabling direct drive of multiple TTL inputs or moderate-length PCB traces without external buffers.
Is SNJ54ABT240J pin-compatible with SN74ABT240A variants?
No - while SNJ54ABT240J shares identical logic function and pin numbering with commercial SN74ABT240A devices, its CDIP-J package has different mechanical dimensions, lead finish (SNPB), and thermal characteristics. Electrical pinout matches, but PCB footprints are not interchangeable due to larger pad pitch and absence of RoHS-compliant plating on SNJ54ABT240J.
What packaging and marking information applies to SNJ54ABT240J?
SNJ54ABT240J is supplied in a 20-pin Ceramic Dual-In-Line Package (CDIP-J), tube-packed with 20 units per tube. The top-side marking is "SNJ54ABT240J", and it carries MIL-STD-130 UID-compliant traceability per TI's Package Option Addendum. Lead finish is 100% tin-lead (SNPB), non-RoHS compliant, and MSL rating is N/A per JEDEC standards due to hermetic sealing.
SNJ54ABT240J 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:
- -
SNJ54ABT240J FAQ
1.How can I place an order for SNJ54ABT240J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ABT240J 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 SNJ54ABT240J reliable?
The price and inventory of SNJ54ABT240J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ABT240J is usually 5 days.
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Once your SNJ54ABT240J 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 SNJ54ABT240J?
For technical support, including SNJ54ABT240J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ABT240J requirements.
6.How does Aetrix verify that SNJ54ABT240J is sourced from the original manufacturer or authorized distributors?
All SNJ54ABT240J 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 SNJ54ABT240J meets industry standards.
7.What is the process for return or replacement of SNJ54ABT240J?
All SNJ54ABT240J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ABT240J, 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 SNJ54ABT240J part is unused and in its original packaging.
Return procedure for SNJ54ABT240J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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