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Texas Instruments SNJ54ABT125W
- Part No.:
- SNJ54ABT125W
- Manufacturer:
- Texas Instruments
- Package:
- 14-CFlatPack
- Datasheet:
-
SNJ54ABT125W.pdf
- Description:
- 54ABT125 QUADRUPLE BUS BUFFER GA
- Quantity:
- Payment:
- Shipping:
Inventory:4,802
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Product details
Overview
SNJ54ABT125W from Texas Instruments is a military-grade quadruple bus buffer gate with 3-state outputs, designed for high-reliability aerospace and defense systems operating from −55°C to 125°C. It delivers ±32-mA high-drive output capability, supports hot insertion via Ioff and power-up 3-state logic, and features <1-V output ground bounce at 5 V and 25°C - critical for noise-sensitive avionics data buses.
For engineers reviewing the SNJ54ABT125W datasheet, SNJ54ABT125W pinout, SNJ54ABT125W application, or SNJ54ABT125W equivalent, this page provides verified electrical specs, CFP package mechanical data, MIL-PRF-38535 compliance context, thermal performance (θJA = 96°C/W), and validated drop-in alternatives for legacy system upgrades.
Technical Context
The SNJ54ABT125W implements four independent noninverting buffers, each controlled by a dedicated output-enable (OE) input that places the Y output in high-impedance when high. Its Ioff circuitry actively disables outputs during power-down to prevent backflow current, while power-up 3-state ensures outputs remain Hi-Z during supply ramp-up/down.
This device uses bipolar TTL-compatible ABT logic, operates strictly at 4.5–5.5 V, and meets JEDEC JESD-17 latch-up (>500 mA) and JESD-22 ESD standards (2000-V HBM, 200-V MM). All inputs require termination to VCC or GND per SCBA004 to avoid floating-node instability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - mandates regulated 5-V rail; no operation below 4.5 V. |
| Output Drive | −32 mA IOH / +64 mA IOL - drives heavy capacitive loads (e.g., >50 pF) without signal degradation. |
| Propagation Delay | 1 ns min / 4.9 ns max (tPLH, tPHL @ 5 V) - enables ≤200-MHz bus timing in synchronous systems. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - compatible with TTL and 5-V CMOS logic families. |
| Hot-Insertion Support | Ioff ≤ ±100 μA at VCC = 0 - prevents damage during live board replacement in mission-critical chassis. |
| Operating Temperature | −55°C to +125°C - qualified per MIL-PRF-38535 for extended-life military platforms. |
| Package Thermal Impedance | θJA = 96°C/W (CFP-W) - requires minimal heatsinking in convection-cooled enclosures. |
Pinout & Package
SNJ54ABT125W is housed in a 14-pin Ceramic Flatpack (CFP-W) package with 0.050″ lead pitch, hermetically sealed per MIL-STD-1835, and rated for 5.08 mm max height. The package features glass-frit ceramic lid sealing and is RoHS-exempt (SNPB finish).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Output Enable (OE) | Active-low control per channel; OE = high forces Y into Hi-Z state. |
| 2, 5, 11, 14 | Input (A) | Noninverting data input; must be terminated to VCC or GND to prevent oscillation. |
| 3, 6, 12, 9 | Output (Y) | 3-state buffered output; sinks up to 64 mA or sources up to 32 mA. |
| 7 | GND | Signal reference plane; requires low-inductance connection to minimize ground bounce. |
| 14 | VCC | Primary power supply; decoupling capacitor (0.1 μF) required within 1 cm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | Delivers −32 mA/64 mA drive strength to maintain signal integrity across long PCB traces or multi-drop buses. |
| Power-Up 3-State | Guarantees Hi-Z outputs during VCC ramp-up/down, eliminating bus contention in cold-start or reset scenarios. |
| Ioff Protection | Blocks reverse current flow when powered off, enabling safe hot-swap in modular avionics backplanes. |
| MIL-PRF-38535 Qualification | Full parametric testing across temperature extremes; meets radiation-hardness and reliability requirements for space-qualified systems. |
| Low Ground Bounce | VOLP < 1 V at 5 V/25°C ensures clean logic transitions even under fast switching conditions. |
Applications
| Avionics Data Bus Interface | Tactical Radio Baseband Processing |
|---|---|
Use Scenario: Isolating ARINC 429 transmitter/receiver lines in flight control computers. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE control per channel for time-multiplexed data routing. Use Value: Prevents bus contention during mode switching and withstands −55°C to 125°C thermal cycling in unpressurized bays. | Use Scenario: Level-shifting and driving IF-stage digital control signals in SDR transceivers. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state outputs enabling dynamic reconfiguration of filter banks and DAC paths. Use Value: High-current drive (64 mA) maintains edge rate on 50-Ω transmission lines; Ioff protects FPGA I/O during partial reconfiguration. |
| Secure Military Crypto Module | Ruggedized Industrial PLC Backplane |
Use Scenario: Buffering key schedule signals between AES engine and memory controller in TEMPEST-certified hardware. IC Role / Device Role / Timing Role: Timing-critical data path isolator with sub-5-ns propagation delay and guaranteed Hi-Z during power sequencing. Use Value: MIL-spec temperature range and hermetic CFP packaging ensure operation in shock/vibration environments without parameter drift. | Use Scenario: Interfacing microcontroller GPIOs to noisy 24-V industrial I/O modules. IC Role / Device Role / Timing Role: Robust level translator and driver with ESD protection (2000-V HBM) and latch-up immunity (>500 mA). Use Value: Eliminates need for external TVS diodes or series resistors; reduces BOM count in DIN-rail mounted controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ABT125J | Same ABT logic, CDIP-14 package (5.08-mm height); θJA = N/A due to hermetic construction. | Preferred for through-hole prototyping and legacy board repairs where CFP footprint unavailable. | Select when manual soldering or socket-based test fixtures are used; identical timing and drive strength. |
| SNJ54ABT125FK | LCCC-20 package with 1.27-mm pitch; includes internal thermal pad; tested per MIL-PRF-38535 Class V. | Suitable for high-vibration environments requiring superior mechanical stability and lower inductance. | Choose for space-constrained, high-G aerospace payloads where CFP's 0.050″ leads may fatigue. |
Compared with SNJ54ABT125J and SNJ54ABT125FK, the SNJ54ABT125W offers optimal thermal resistance (96°C/W) and lowest profile among military ABT125 variants, making it ideal for conduction-cooled chassis where airflow is restricted.
Availability
SNJ54ABT125W is available at Aetrix Electronics and suitable for avionics subsystem integration, secure crypto module production, and ruggedized industrial control systems requiring stable component supply across extended lifecycle commitments.
Supply support for SNJ54ABT125W 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 SNJ54ABT125W belongs to TI's military logic family, engineered specifically for extreme-environment digital interfacing where standard commercial parts fail - emphasizing latch-up immunity, wide temperature operation, and hermetic packaging integrity.
FAQ
What is the maximum allowable supply voltage for SNJ54ABT125W?
The absolute maximum supply voltage for SNJ54ABT125W is 7 V, but the recommended operating range is strictly 4.5 V to 5.5 V per the datasheet. Operation outside this window risks parametric shift or accelerated wear, especially at temperature extremes. Always use a regulated 5-V source with local 0.1-μF ceramic decoupling placed within 1 cm of the VCC pin on the SNJ54ABT125W.
Does SNJ54ABT125W support hot insertion, and how is it implemented?
Yes, SNJ54ABT125W supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, limiting reverse current to ±100 μA, and power-up 3-state holds outputs in high-impedance during supply ramp-up/down. These functions are intrinsic to the silicon design and require no external components - simply tie OE to VCC via a pullup resistor (value determined by driver sink capability) to guarantee Hi-Z at power-on.
What is the thermal resistance (θJA) of SNJ54ABT125W, and how does it affect layout?
The SNJ54ABT125W has a measured θJA of 96°C/W in its CFP-W package. This value assumes standard JEDEC test board conditions; actual board-level performance depends on copper area, layer count, and airflow. For reliable operation at full drive (64 mA per output), limit ambient temperature to ≤85°C and provide ≥2 cm² of 2-oz copper connected to the GND pin. Avoid placing heat-generating components adjacent to the SNJ54ABT125W.
Can SNJ54ABT125W be used as a direct replacement for SN74ABT125N in commercial designs?
No - SNJ54ABT125W is not a drop-in replacement for SN74ABT125N. While functionally identical, the SNJ54ABT125W uses a CFP-W package (0.050″ pitch, ceramic body), whereas SN74ABT125N uses PDIP-14 (0.3″ width, plastic). Pinout matches, but PCB footprint, soldering process (reflow vs. wave), and thermal/mechanical behavior differ significantly. Use only after verifying land pattern, reflow profile, and mechanical clearance.
What are the ESD and latch-up ratings for SNJ54ABT125W?
SNJ54ABT125W exceeds JESD-22 ESD standards: 2000-V Human-Body Model (A114-A) and 200-V Machine Model (A115-A). Its latch-up performance exceeds 500 mA per JEDEC JESD-17, verified across −55°C to 125°C. These ratings are fully tested per MIL-PRF-38535 requirements and apply to all pins - no derating needed for military temperature operation.
SNJ54ABT125W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54ABT
- Package/Case:
- 14-CFlatPack
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-CFP
SNJ54ABT125W FAQ
1.How can I place an order for SNJ54ABT125W through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ABT125W 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 SNJ54ABT125W reliable?
The price and inventory of SNJ54ABT125W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ABT125W is usually 5 days.
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SNJ54ABT125W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ABT125W 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 SNJ54ABT125W?
For technical support, including SNJ54ABT125W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ABT125W requirements.
6.How does Aetrix verify that SNJ54ABT125W is sourced from the original manufacturer or authorized distributors?
All SNJ54ABT125W 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 SNJ54ABT125W meets industry standards.
7.What is the process for return or replacement of SNJ54ABT125W?
All SNJ54ABT125W units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ABT125W, 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 SNJ54ABT125W part is unused and in its original packaging.
Return procedure for SNJ54ABT125W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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