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Texas Instruments SNJ54LS08J
- Part No.:
- SNJ54LS08J
- Manufacturer:
- Texas Instruments
- Category:
- Gates and Inverters
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
SNJ54LS08J.pdf
- Description:
- IC GATE AND 4CH 2-INP 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,408
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Product details
Overview
SNJ54LS08J from Texas Instruments is a military-grade quadruple 2-input positive-AND gate IC in a 14-pin ceramic dual in-line package (CDIP), operating across –55°C to +125°C. It delivers TTL-compatible logic levels, typical propagation delay of 15 ns at VCC = 5 V, and fan-out of 10 LS-TTL loads. It is used in hardened digital control systems requiring radiation-tolerant, high-reliability combinational logic.
For engineers reviewing the SNJ54LS08J datasheet, SNJ54LS08J pinout, SNJ54LS08J application, or SNJ54LS08J equivalent, this page provides verified functional specifications, military temperature range validation, CDIP package mechanical data, and direct alternatives for aerospace and defense logic design.
Technical Context
The SNJ54LS08J implements four independent AND gates using low-power Schottky (LS) TTL technology. Each gate features open-collector compatible output structure with guaranteed high-level output voltage ≥2.7 V and low-level output voltage ≤0.5 V under specified load conditions.
It operates from a single 5-V supply with input thresholds aligned to standard TTL logic families: VIH(min) = 2.0 V and VIL(max) = 0.8 V. The device supports direct interfacing with SN54/74-series logic without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | LS-TTL - enables interoperability with legacy 74LS and 54LS systems while reducing power vs standard TTL. |
| Supply Voltage | 5 V ±0.5 V - fixed single-rail operation; no regulation margin required in compliant 5-V systems. |
| Propagation Delay | 15 ns max (tpd) - ensures timing predictability in synchronous control paths up to ~30 MHz clock domains. |
| Operating Temperature | –55°C to +125°C - qualified for extended-range military applications including avionics and ground vehicle ECUs. |
| Fan-Out | 10 LS-TTL loads - supports direct drive of multiple downstream LS inputs without buffering. |
| Input Thresholds | VIH(min) = 2.0 V, VIL(max) = 0.8 V - guarantees noise immunity >0.4 V under worst-case VCC and temperature. |
| Output Drive | IOL = 8 mA, IOH = –0.4 mA - sufficient to sink standard TTL inputs and interface with discrete pull-up networks. |
Pinout & Package
SNJ54LS08J uses a 14-pin ceramic dual in-line package (CDIP-J) with 0.3-inch body width, hermetically sealed ceramic construction, and through-hole mounting. Pin 1 is identified by a notch or dot on the package top edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input A/B per gate | Eight total inputs across four AND gates; each pair (e.g., pins 1&2) feeds one gate's inputs. |
| 3, 6, 10, 13 | Output Y per gate | Four independent open-collector outputs; require external pull-up for HIGH assertion. |
| 7 | GND | Ground reference for all logic and power return paths; must be low-impedance connection. |
| 14 | VCC | +5 V supply input; decoupling capacitor (0.1 µF) required within 1 cm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic CDIP packaging | Enables long-term reliability in high-humidity, high-vibration, and radiation-prone environments per MIL-STD-883. |
| QML-38535 Class V qualification | Meets stringent screening, burn-in, and lot acceptance test requirements for space and defense programs. |
| Open-collector outputs | Supports wired-AND bus configurations and level translation via external pull-up resistors. |
| Low-power Schottky architecture | Reduces dynamic power consumption by ~50% versus standard 5408, enabling higher gate density in thermal-constrained modules. |
| Guaranteed AC/DC parametrics over full temp range | Eliminates need for derating or additional margining in extreme ambient conditions. |
Applications
| Avionics Flight Control Logic | Military Vehicle Power Sequencing |
|---|---|
Use Scenario: Discrete safety interlock verification in fly-by-wire actuator command chains. IC Role / Device Role / Timing Role: Quad AND gate validates simultaneous presence of enable, watchdog, and sensor-ready signals before releasing torque commands. Use Value: Ensures fail-safe behavior via hardware-level voting logic; eliminates software latency in critical path. | Use Scenario: Controlled sequencing of engine control unit (ECU), radar transceiver, and comms subsystem power rails. IC Role / Device Role / Timing Role: Generates gated power-enable pulses only when all upstream health monitors report nominal status. Use Value: Prevents cascading faults during cold-start; meets MIL-STD-1275B surge and brownout resilience requirements. |
| Spacecraft Onboard Telemetry Mux | Tactical Radio Baseband Signal Gating |
Use Scenario: Selective routing of housekeeping sensor data to telemetry downlink based on priority flags. IC Role / Device Role / Timing Role: Enables/disables analog-to-digital converter (ADC) sample strobes using mission-mode control bits. Use Value: Reduces telemetry bandwidth during quiescent phases; preserves EEPROM write cycles in radiation-hardened memory. | Use Scenario: Enabling baseband I/Q signal paths only during active transmit/receive windows to minimize spurious emissions. IC Role / Device Role / Timing Role: Synchronizes RF front-end enable signals with FPGA-generated time-slot boundaries. Use Value: Meets MIL-STD-461G RE102 radiated emissions limits by eliminating continuous analog leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AND gate logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS08W | Same logic function and specs, but in 14-pin CFP (flatpack) package with gull-wing leads. | Preferred for surface-mount PCBs with strict height constraints (<2.5 mm); not suitable for through-hole assembly. | Select SNJ54LS08W when board real estate or automated placement favors flatpack over DIP. |
| SNJ54LS08FK | Same logic function and specs, but in 20-pin LCCC (leadless ceramic chip carrier) with 1.27-mm pitch. | Used in ultra-high-reliability hybrid microcircuits where hermeticity and thermal cycling resistance exceed CDIP capabilities. | Choose SNJ54LS08FK for multi-chip module integration or applications requiring >100,000 thermal cycles. |
Compared with SNJ54LS08W and SNJ54LS08FK, SNJ54LS08J offers optimal mechanical robustness for manual prototyping, legacy board upgrades, and systems requiring proven through-hole solder joint integrity under shock/vibe stress.
Availability
SNJ54LS08J is available at Aetrix Electronics and suitable for avionics, military vehicle electronics, spacecraft telemetry, and secure radio baseband systems requiring stable component supply across extended product lifecycles.
Supply support for SNJ54LS08J 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, aerospace, and defense markets.
The SNJ54LS08J belongs to TI's military 54LS logic family, designed specifically for ruggedized digital control in environments where temperature extremes, vibration, and long-term field reliability are non-negotiable.
FAQ
What is the maximum operating temperature range for SNJ54LS08J?
The SNJ54LS08J is rated for operation from –55°C to +125°C, fully qualified per MIL-PRF-38535 Class V requirements. This extended range enables deployment in jet engine bays, desert-deployed radios, and satellite payload compartments where ambient thermal extremes exceed commercial-grade logic limits. SNJ54LS08J maintains full DC and AC parametric compliance across this entire span without derating.
Does SNJ54LS08J have open-collector outputs?
Yes, SNJ54LS08J features four open-collector outputs (pins 3, 6, 10, 13). Each requires an external pull-up resistor to VCC or another logic rail to assert HIGH logic levels. This architecture supports wired-AND bus structures, mixed-voltage interfacing, and current-sinking applications such as LED driving or relay coil control - all while maintaining SNJ54LS08J's guaranteed output sink capability of 8 mA per channel.
Is SNJ54LS08J RoHS-compliant?
No, SNJ54LS08J is not RoHS-compliant. Its lead finish is SNPB (tin-lead), and it carries a "No" RoHS designation per TI's official packaging addendum. This reflects its heritage as a military-specification part intended for applications where tin whisker mitigation and long-term solder joint reliability outweigh RoHS compliance mandates - particularly in aerospace and defense platforms governed by MIL-STD-1581 or NASA-SSP-30230.
How does SNJ54LS08J differ from commercial SN74LS08 variants?
SNJ54LS08J differs from SN74LS08 in three key ways: (1) extended temperature range (–55°C to +125°C vs. 0°C to +70°C), (2) QML-38535 Class V qualification with full MIL-STD-883 testing, and (3) hermetic CDIP packaging instead of plastic DIP or SOIC. These differences make SNJ54LS08J suitable for mission-critical systems where SN74LS08 would fail qualification or degrade prematurely.
Can SNJ54LS08J be used as a direct replacement for SN5408 or SN54S08?
SNJ54LS08J is functionally compatible with SN5408 and SN54S08 as a quadruple 2-input AND gate, but substitution requires validation of timing and drive strength. SNJ54LS08J has slower propagation delay (15 ns) than SN54S08 (3 ns) but lower power than SN5408. Its LS-TTL input thresholds match both, ensuring interoperability - however, SN54S08's higher speed and SN5408's higher drive may necessitate redesign if timing margins are tight or fan-out exceeds 10.
SNJ54LS08J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- AND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 8.8 mA
- Current - Output High, Low:
- 400µA, 4mA
- Input Logic Level - Low:
- 0.7V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 20ns @ 5V, 15pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CDIP
SNJ54LS08J FAQ
1.How can I place an order for SNJ54LS08J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54LS08J 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 SNJ54LS08J reliable?
The price and inventory of SNJ54LS08J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54LS08J is usually 5 days.
3.What payment methods are accepted for SNJ54LS08J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54LS08J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54LS08J?
SNJ54LS08J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54LS08J 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 SNJ54LS08J?
For technical support, including SNJ54LS08J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54LS08J requirements.
6.How does Aetrix verify that SNJ54LS08J is sourced from the original manufacturer or authorized distributors?
All SNJ54LS08J 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 SNJ54LS08J meets industry standards.
7.What is the process for return or replacement of SNJ54LS08J?
All SNJ54LS08J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54LS08J, 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 SNJ54LS08J part is unused and in its original packaging.
Return procedure for SNJ54LS08J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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