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Texas Instruments SNJ54ABT240W
- Part No.:
- SNJ54ABT240W
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SNJ54ABT240W.pdf
- Description:
- 54ABT240 OCTAL BUFFERS/DRIVERS W
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Inventory:118
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Product details
Overview
SNJ54ABT240W from Texas Instruments is a military-grade octal inverting buffer/driver with 3-state outputs, designed for high-density bus interfacing in aerospace and defense systems. It operates across –55°C to 125°C, delivers ±32-mA high-drive output capability, features Ioff partial-power-down support, and provides low ground bounce (<1 V) at 5 V supply. It serves as a critical signal conditioning component in MIL-STD-1553 bus receivers and avionics backplane drivers.
For engineers reviewing the SNJ54ABT240W datasheet, SNJ54ABT240W pinout, SNJ54ABT240W application, or SNJ54ABT240W equivalent, key selection criteria include its CFP-20 package thermal performance (θJA = N/A per MIL spec), guaranteed latch-up immunity (>500 mA), and compatibility with legacy TTL/CMOS logic families in harsh-environment embedded control systems.
Technical Context
The SNJ54ABT240W implements two independent 4-bit inverting buffer sections, each controlled by a dedicated active-low output-enable (OE) input. Its architecture supports true 3-state output control with symmetrical OE logic and inverted A→Y data path, enabling bidirectional bus arbitration without external logic.
It integrates Ioff circuitry that disables outputs when VCC = 0 V, preventing backflow current during power sequencing-critical for hot-swap and partial-power-down operation. Absolute maximum ratings include 7-V supply tolerance and –0.5-V to 5.5-V output voltage range in high-impedance state, ensuring robustness against transient overvoltage events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V military power rails and tolerance to supply droop. |
| Output Drive | –32 mA IOH / 64 mA IOL - enables direct drive of heavy capacitive loads (e.g., >50 pF buses) without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 4.3 ns @ 5 V - supports high-speed address/data buffering in real-time avionics timing paths. |
| Ioff Current | ±100 µA max @ VCC = 0 - guarantees safe isolation during system power-down sequences per MIL-PRF-38535 requirements. |
| Operating Temperature | –55°C to +125°C - qualified for extended-range deployment in engine-mounted or space-constrained military platforms. |
| ESD Protection | 2000-V HBM / 200-V MM - exceeds MIL-STD-883 Class 3001 requirements for handling and board assembly robustness. |
| Latch-Up Immunity | >500 mA per JESD17 - eliminates risk of destructive latch-up under single-event transients in radiation-prone environments. |
Pinout & Package
SNJ54ABT240W uses a 20-pin Ceramic Flatpack (CFP) package with gull-wing leads, 1.27-mm pitch, and 26.16-mm body width. The package is hermetically sealed and rated for high-reliability military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit section; must be pulled high via resistor during power-up to ensure defined high-Z state. |
| 1A1–1A4, 2A1–2A4 | Inverting input | Eight buffered inputs accepting TTL/CMOS logic levels; inverted data passed to corresponding Y outputs when OE is low. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-state output | Eight high-drive outputs with rail-to-rail swing; enter high-impedance state when respective OE is high. |
| VCC (Pin 10) | Power supply | 5-V nominal supply connection; decoupling capacitor required within 10 mm for stable switching performance. |
| GND (Pin 11) | Ground reference | Common return path for all signals and power; requires low-inductance connection to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA source / 64 mA sink capability enables direct interface to unterminated transmission lines and legacy bus stubs. |
| Ioff Partial-Power-Down | Prevents damaging reverse current flow when VCC is off, supporting safe hot-swap and phased power sequencing in multi-rail systems. |
| Low Ground Bounce | VOLP <1 V at 5 V/25°C ensures signal integrity on shared ground planes in dense PCB layouts. |
| MIL-PRF-38535 Compliance | Qualified to Class V (space-level) screening including burn-in, temperature cycling, and hermeticity testing for mission-critical use. |
| Symmetrical OE Inputs | Dedicated 1OE and 2OE pins allow independent gating of each 4-bit channel, simplifying bus arbitration logic in dual-bus architectures. |
Applications
| MIL-STD-1553 Bus Interface | Avionics Backplane Driver |
|---|---|
Use Scenario: Signal conditioning and level translation between processor-side CMOS logic and MIL-STD-1553 bus transceivers. IC Role / Device Role / Timing Role: Inverting buffer isolating BC/RT logic from bus transceiver inputs while providing drive strength for 1553's 78-Ω differential line. Use Value: Eliminates need for discrete pull-up networks and reduces propagation delay skew across eight parallel data/control lines. | Use Scenario: Driving multiple load cards on a ruggedized aircraft backplane with long trace runs and high capacitance. IC Role / Device Role / Timing Role: High-current octal driver translating CPU address/data to backplane slots, with independent OE control per channel group. Use Value: Sustains signal integrity at >10 MHz clock rates despite >100 pF total bus capacitance due to 64-mA sink capability. |
| Rad-Hard System Power Sequencing | Tactical Radio Baseband Interface |
Use Scenario: Enabling safe power-down of subsystems while maintaining isolation between powered and unpowered domains. IC Role / Device Role / Timing Role: Ioff-enabled buffer placed between FPGA I/O banks and analog front-end modules during selective power gating. Use Value: Prevents backfeed current exceeding 100 µA, avoiding unintended biasing or latch-up in adjacent powered circuits. | Use Scenario: Interfacing baseband processor GPIOs to RF module control lines requiring precise timing and noise immunity. IC Role / Device Role / Timing Role: Low-skew inverting driver synchronizing TX/RX enable, antenna switch control, and PA bias signals. Use Value: Achieves sub-5 ns propagation delay matching across all eight control lines, minimizing inter-signal skew in time-critical radio protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ABT240J | CDIP-20 package; higher θJA (~69°C/W); same electrical specs and temp range. | Better suited for through-hole prototyping or legacy board rework where CFP soldering is impractical. | Select SNJ54ABT240J when manual assembly, thermal testing, or socket-based validation is required. |
| SNJ54ABT240FK | LCCC-20 package; leadless ceramic construction; lower profile (2.03 mm); identical DC/AC specs. | Preferred for SWaP-constrained applications such as missile guidance electronics or UAV flight controllers. | Choose SNJ54ABT240FK when board height is limited and reflow-compatible land patterns are available. |
Compared with SNJ54ABT240J and SNJ54ABT240FK, the SNJ54ABT240W offers superior thermal dissipation in surface-mount configurations due to its CFP metal lid and gull-wing leadform, making it optimal for conduction-cooled chassis designs where airflow is restricted.
Availability
SNJ54ABT240W is available at Aetrix Electronics and suitable for MIL-STD-1553 bus interface, avionics backplane driver, and rad-hard system power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SNJ54ABT240W 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 ABT logic family-including SNJ54ABT240W-is engineered for high-speed, high-drive 3-state bus interface in mission-critical systems where signal integrity, latch-up immunity, and extended temperature operation are non-negotiable.
FAQ
What is the operating temperature range for SNJ54ABT240W?
The SNJ54ABT240W is specified for operation from –55°C to +125°C, meeting MIL-PRF-38535 Class V requirements for space and high-reliability defense applications. This range is validated across all electrical parameters in the datasheet, including propagation delay, drive strength, and Ioff leakage, ensuring consistent performance in extreme environmental conditions where the SNJ54ABT240W is deployed.
Does SNJ54ABT240W support partial-power-down operation?
Yes, SNJ54ABT240W includes Ioff circuitry that disables outputs when VCC = 0 V, limiting reverse current to ±100 µA. This feature allows safe insertion and removal in live backplanes and supports phased power sequencing in multi-voltage systems-key for reliable operation in platforms where the SNJ54ABT240W interfaces with independently powered subsystems.
What package type is used for SNJ54ABT240W?
SNJ54ABT240W uses a 20-pin Ceramic Flatpack (CFP) package with gull-wing leads, 1.27-mm pitch, and hermetic ceramic construction. This package is MIL-STD-883 qualified and optimized for high-reliability surface-mount assembly in aerospace and defense electronics where moisture resistance and thermal stability are critical for long-term SNJ54ABT240W field operation.
How does SNJ54ABT240W differ from commercial SN74ABT240A variants?
SNJ54ABT240W differs from SN74ABT240A in three key ways: it is screened to MIL-PRF-38535 Class V (vs. commercial grade), operates from –55°C to +125°C (vs. –40°C to +85°C), and uses a CFP package (vs. SOIC/SSOP/TSSOP). Electrical specs are otherwise identical, but only SNJ54ABT240W guarantees performance and reliability under military environmental stress profiles applicable to the SNJ54ABT240W's target use cases.
What is the maximum output current rating for SNJ54ABT240W?
The SNJ54ABT240W supports –32 mA high-level output current (IOH) and 64 mA low-level output current (IOL) per pin, measured at VCC = 5 V and TA = 25°C. These values are fully characterized across the full temperature range and form the basis for SNJ54ABT240W's ability to drive heavy capacitive loads and unterminated transmission lines in demanding military communication systems.
SNJ54ABT240W 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:
- -
SNJ54ABT240W FAQ
1.How can I place an order for SNJ54ABT240W through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ABT240W 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 SNJ54ABT240W reliable?
The price and inventory of SNJ54ABT240W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ABT240W is usually 5 days.
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SNJ54ABT240W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ABT240W 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 SNJ54ABT240W?
For technical support, including SNJ54ABT240W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ABT240W requirements.
6.How does Aetrix verify that SNJ54ABT240W is sourced from the original manufacturer or authorized distributors?
All SNJ54ABT240W 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 SNJ54ABT240W meets industry standards.
7.What is the process for return or replacement of SNJ54ABT240W?
All SNJ54ABT240W units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ABT240W, 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 SNJ54ABT240W part is unused and in its original packaging.
Return procedure for SNJ54ABT240W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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