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Texas Instruments SNJ54S241J
- Part No.:
- SNJ54S241J
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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SNJ54S241J.pdf
- Description:
- 54S241 OCTAL BUFFERS AND LINE DR
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Product details
Overview
SNJ54S241J from Texas Instruments is a military-grade octal non-inverting buffer/line driver with dual 4-bit channels, 3-state outputs, PNP inputs, and hysteresis-enhanced noise immunity. It operates over –55°C to 125°C at 4.5–5.5 V, delivers 48 mA low-level output drive, and achieves 6–9 ns typical propagation delay (tPLH/tPHL) under 90 Ω/50 pF load - enabling robust bus interfacing in harsh-environment memory address and clock distribution systems.
For engineers reviewing the SNJ54S241J datasheet, SNJ54S241J pinout, SNJ54S241J application, or SNJ54S241J equivalent, key selection criteria include its dual-channel independent enable control (1G/2G), guaranteed 400-mV input hysteresis, compatibility with 3.3-V/5-V logic inputs, and CDIP-20 package suitability for high-reliability MIL-PRF-38535-compliant designs.
Technical Context
The SNJ54S241J implements two independent 4-bit non-inverting buffers, each with dedicated active-low output-enable (1G, 2G) pins. Its Schottky transistor logic (S-TTL) architecture provides fast switching (6–9 ns tPLH/tPHL) and high sink current (48 mA IOL), optimized for terminated bus driving down to 133 Ω.
Input hysteresis (0.2–0.4 V VT+−VT−) and PNP input structure reduce DC loading and improve noise margins on shared bus lines. The device supports mixed-voltage interfacing, accepting 2.0-V minimum VIH from 3.3-V sources while operating from a 5-V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - ensures stable operation across military temperature range without regulation overhead |
| Propagation Delay | 6–9 ns (tPLH/tPHL, RL=90 Ω, CL=50 pF) - enables high-speed memory address and clock buffering |
| Output Drive | 48 mA IOL - drives heavily loaded or long-trace buses without external amplification |
| Input Hysteresis | 0.2–0.4 V - rejects noise on shared bus lines in electrically noisy environments |
| Operating Temp | –55°C to +125°C - qualified per MIL-PRF-38535 for aerospace and defense applications |
| ESD Rating | 500 V HBM - meets standard handling requirements for military assembly processes |
| Input Compatibility | 2.0-V minimum VIH - interoperates directly with 3.3-V logic without level shifters |
Pinout & Package
SNJ54S241J is supplied in a hermetically sealed ceramic dual-in-line package (CDIP-20, body size 24.20 mm × 6.92 mm), designed for high-reliability, high-temperature, and radiation-tolerant applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1G / 2G | Active-low output-enable for Channel 1 and Channel 2 - controls high-impedance state independently per channel |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4 / 2A1–2A4 | Non-inverting data inputs - accepts 2.0-V min VIH for 3.3-V/5-V mixed-signal interfacing |
| 3, 5, 7, 9, 12, 14, 16, 18 | 2Y4–2Y1 / 1Y4–1Y1 | Non-inverting 3-state outputs - deliver 48 mA sink capability and fast edge rates into 90 Ω loads |
| 10 | GND | Signal ground reference - required for noise margin integrity and thermal dissipation |
| 20 | VCC | +5 V power supply - must be decoupled locally to suppress switching transients |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit channels | Enables separate control of two bus segments (e.g., address vs. data) using discrete 1G/2G enables |
| PNP input structure | Reduces DC loading on upstream drivers, preserving fan-out capability in dense bus topologies |
| 400-mV noise margin | Guarantees reliable operation in high-noise environments such as motor drive or RF-adjacent systems |
| 3-state output architecture | Allows direct connection to shared bidirectional buses without contention risk when disabled |
| MIL-PRF-38535 compliance | All parameters tested per military specification - eliminates need for additional qualification testing |
Applications
| Memory Address Buffering | High-Reliability Clock Distribution |
|---|---|
Use Scenario: Driving 20-bit memory address bus in airborne flight computer with >10 cm trace lengths and EMI exposure. IC Role / Device Role / Timing Role: Non-inverting buffer isolating CPU address outputs from memory module inputs; dual-channel enables staggered enable timing. Use Value: 48 mA IOL and 6–9 ns tPLH ensure clean signal edges across long traces; hysteresis prevents metastability during voltage transients. | Use Scenario: Distributing synchronized clock signals to multiple FPGAs in a radar signal processor chassis. IC Role / Device Role / Timing Role: Low-skew repeater for 5-V TTL clock tree; independent 1G/2G allows dynamic channel gating during power sequencing. Use Value: Matched propagation delays and PNP inputs minimize skew and loading-induced jitter on critical timing paths. |
| Terminated Bus Interface | Mixed-Voltage System Translation |
Use Scenario: Interfacing legacy 5-V microcontroller I/O to modern 3.3-V peripheral ASIC via 133-Ω terminated backplane. IC Role / Device Role / Timing Role: Line driver meeting TI's specified 133-Ω termination requirement; S-version speed grade ensures timing closure. Use Value: Guaranteed 6–9 ns delay and 48 mA drive maintain signal integrity across impedance-matched links without re-timing. | Use Scenario: Level-shifting between 3.3-V sensor interface and 5-V data acquisition subsystem in satellite payload. IC Role / Device Role / Timing Role: Logic-level translator with no external components - accepts 2.0-V VIH while powered from 5-V rail. Use Value: Eliminates discrete level shifters; hysteresis prevents false triggering from sensor noise in low-power sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS241J | Slower propagation (12–18 ns), lower IOL (12 mA), LS-TTL process - reduced speed/power trade-off | Better suited for low-noise, low-power subsystems where timing margin exceeds 12 ns | Select when lower ICC (27–46 mA vs. 95–147 mA) and reduced EMI are prioritized over speed |
| SN74S241N | Commercial temperature range (0°C to 70°C), plastic DIP-20 package - no hermetic seal or MIL qualification | Applicable only in benign-environment industrial or telecom infrastructure | Choose for cost-sensitive, non-military production where extended temperature and reliability testing are unnecessary |
Compared with SNJ54LS241J and SN74S241N, SNJ54S241J uniquely combines military temperature range, hermetic CDIP packaging, S-TTL speed (6–9 ns), and 48 mA drive - making it irreplaceable in space-qualified or high-vibration avionics bus interfaces requiring guaranteed performance under stress.
Availability
SNJ54S241J is available at Aetrix Electronics and suitable for aerospace avionics, defense radar subsystems, and industrial control systems requiring stable component supply across extended lifecycle and extreme environmental conditions.
Supply support for SNJ54S241J 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.
SNJ54S241J belongs to TI's military-grade S-TTL logic family, engineered for high-speed, high-drive bus interfacing in mission-critical systems where reliability under thermal, mechanical, and electrical stress is non-negotiable.
FAQ
What is the maximum operating temperature for SNJ54S241J?
The SNJ54S241J is rated for operation from –55°C to +125°C, fully compliant with MIL-PRF-38535 requirements for high-reliability military and aerospace applications. This extended range is validated through full parametric testing across temperature extremes, not derated or inferred.
Does SNJ54S241J support 3.3-V logic inputs?
Yes, SNJ54S241J accepts 2.0-V minimum high-level input voltage (VIH), enabling direct interfacing with 3.3-V CMOS and TTL outputs without level-shifting circuitry. This is explicitly specified in Section 6.3 of the SDLS144D datasheet under Recommended Operating Conditions.
What is the output drive capability of SNJ54S241J?
SNJ54S241J delivers 48 mA low-level output current (IOL) per pin, as confirmed in Section 6.6 Electrical Characteristics – SNx4S24x. This enables direct driving of heavily loaded or long-trace buses, including those terminated to 133 Ω as documented in the Applications section.
Is SNJ54S241J pin-compatible with SNJ54LS241J?
Yes, SNJ54S241J and SNJ54LS241J share identical pinout, package (CDIP-20), and functional block diagram per the SDLS144D datasheet. However, they differ in speed (6–9 ns vs. 12–18 ns), drive strength (48 mA vs. 12 mA), and power consumption (95–147 mA vs. 27–46 mA ICC).
What package type is used for SNJ54S241J?
SNJ54S241J is supplied exclusively in the ceramic dual-in-line package (CDIP-20), designated "J" in TI's ordering nomenclature. Its body dimensions are 24.20 mm × 6.92 mm, and it is hermetically sealed for moisture resistance and long-term reliability in harsh environments.
SNJ54S241J 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:
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- Output Type:
- -
- Current - Output High, Low:
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- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
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- Qualification:
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- Mounting Type:
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- Supplier Device Package:
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SNJ54S241J FAQ
1.How can I place an order for SNJ54S241J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54S241J 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 SNJ54S241J reliable?
The price and inventory of SNJ54S241J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54S241J is usually 5 days.
3.What payment methods are accepted for SNJ54S241J?
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4.How is shipping managed for SNJ54S241J?
SNJ54S241J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54S241J 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 SNJ54S241J?
For technical support, including SNJ54S241J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54S241J requirements.
6.How does Aetrix verify that SNJ54S241J is sourced from the original manufacturer or authorized distributors?
All SNJ54S241J 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 SNJ54S241J meets industry standards.
7.What is the process for return or replacement of SNJ54S241J?
All SNJ54S241J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54S241J, 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 SNJ54S241J part is unused and in its original packaging.
Return procedure for SNJ54S241J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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