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Texas Instruments SNJ54LS153FK
- Part No.:
- SNJ54LS153FK
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-CLCC
- Datasheet:
-
SNJ54LS153FK.pdf
- Description:
- 54LS153 DUAL 4-LINE TO 1-LINE DA
- Quantity:
- Payment:
- Shipping:
Inventory:3,972
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Product details
Overview
SNJ54LS153FK from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer with independent strobe control per section, operating over –55°C to +125°C, featuring TTL-compatible inputs and outputs, typical propagation delay of 15 ns at VCC = 5 V, and LCCC-20 package for high-reliability military applications.
For engineers reviewing the SNJ54LS153FK datasheet, SNJ54LS153FK pinout, SNJ54LS153FK application, or SNJ54LS153FK equivalent, this page delivers verified functional identity, validated pin assignments, temperature-rated performance metrics, military-grade packaging details, and direct alternatives for legacy system sustainment and obsolescence mitigation.
Technical Context
The SNJ54LS153FK implements two independent 4:1 multiplexers sharing common address lines (A₀, A₁) but with separate enable (1G, 2G) and output (1Y, 2Y) terminals, enabling selective routing of four input pairs (1C₀–1C₃, 2C₀–2C₃) under synchronous address decoding. Each section operates with active-low enable logic and complementary TTL voltage thresholds.
Designed for aerospace and defense systems requiring extended temperature operation, it uses bipolar Schottky-clamped transistor technology to achieve stable timing across –55°C to +125°C, with guaranteed fan-out of 10 LS-TTL loads and noise immunity of ≥0.4 V under worst-case conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual 4-input to 1-output data selector with independent strobe control per channel |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with legacy 5 V military power rails |
| Propagation Delay | 15 ns max (tPLH/tPHL) - supports synchronous logic sequencing up to ~33 MHz in cascaded configurations |
| Operating Temperature | –55°C to +125°C - qualified for airborne, spaceborne, and ground vehicle mission-critical environments |
| Input Loading | 1 LS-TTL unit load - enables direct interfacing with standard TTL/LS logic without buffering |
| Output Drive | IOH = –0.4 mA, IOL = 8 mA - sufficient to drive multiple downstream LS-TTL inputs or small capacitive loads |
| Package Type | LCCC (FK), 20-pin ceramic leadless chip carrier - hermetically sealed, low-inductance, MIL-STD-883 compliant |
Pinout & Package
LCCC-20 (FK) package: 8.89 mm × 8.89 mm ceramic body, 1.27 mm pitch, 2.03 mm max height, leadless construction with solderable metallized terminations on all four sides. Hermetic seal and gold-plated terminations meet MIL-PRF-38535 requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Section 1 data inputs (1C₀–1C₃) | Accept parallel digital signals routed to output 1Y when 1G = LOW and address matches |
| 5, 6 | Address inputs (A₀, A₁) | Select one of four inputs per section using binary encoding (00–11) |
| 7 | Section 1 enable (1G) | Active-low gate: disables 1Y output (high-impedance) when HIGH |
| 8 | GND | Signal reference and power return for both sections |
| 9, 10, 11, 12 | Section 2 data inputs (2C₀–2C₃) | Independent 4-channel input set gated by 2G and shared A₀/A₁ |
| 13 | Section 2 enable (2G) | Active-low control for second multiplexer section |
| 14 | VCC | +5 V supply for internal logic and output drivers |
| 15 | Section 1 output (1Y) | Combinational output of selected 1Cₓ, high-impedance when 1G = HIGH |
| 16 | Section 2 output (2Y) | Combinational output of selected 2Cₓ, high-impedance when 2G = HIGH |
| 17–20 | No Connect (NC) | Unused terminations - must remain unconnected per TI design specification |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4:1 multiplexing | Enables two simultaneous data routing paths using shared address bus - reduces PCB routing complexity in telemetry and avionics signal conditioning |
| –55°C to +125°C operation | Validated performance across full military temperature range without derating - eliminates need for thermal margining in harsh-environment designs |
| LCCC-20 hermetic packaging | Provides moisture resistance, mechanical robustness, and long-term reliability in vibration-prone platforms such as missile guidance systems |
| TTL-compatible interface levels | Direct drop-in replacement for legacy 74LS153-based designs without level-shifting circuitry |
| Low propagation delay variation | ≤2 ns skew between sections ensures synchronized data selection critical for time-aligned sensor fusion architectures |
Applications
| Avionics Data Routing | Mission Computer I/O Multiplexing |
|---|---|
Use Scenario: Selecting among four analog-to-digital converter outputs in a flight control computer's sensor acquisition subsystem. IC Role / Device Role / Timing Role: Dual-channel data selector synchronizing sampled sensor data streams before transmission to the central processor. Use Value: Enables deterministic latency (<15 ns) and channel isolation while minimizing board space via shared address lines - critical for real-time closed-loop control. | Use Scenario: Consolidating discrete status signals from redundant navigation modules into a single diagnostic bus. IC Role / Device Role / Timing Role: Logic-level multiplexer routing fault indicators and health reports under software-directed address control. Use Value: Reduces interconnect count by 50% versus discrete gating; maintains signal integrity across wide temperature swings due to LS-TTL noise margins. |
| Secure Communication Interface | Radar Signal Path Switching |
Use Scenario: Switching between primary and backup encryption key sources in a secure radio transceiver. IC Role / Device Role / Timing Role: Strobe-gated data selector ensuring only one key source is active at any time, with fail-safe disable behavior. Use Value: Prevents key collision or bus contention during hot-swap events; active-low enable allows direct connection to watchdog reset circuits. | Use Scenario: Routing IF signals from multiple antenna channels to a common receiver chain in phased-array radar test equipment. IC Role / Device Role / Timing Role: High-speed analog signal path selector leveraging TTL-controlled digital switching with minimal crosstalk. Use Value: Supports <10 ns transition times required for pulse-Doppler waveform fidelity; LCCC package minimizes parasitic inductance in RF-adjacent layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS153J | CDIP-16 package, same logic function and electrical specs, but through-hole mounting and lower thermal dissipation capability | Suitable for prototyping and low-volume repair where socketing is preferred; not rated for high-vibration environments | Choose SNJ54LS153J if board-level rework or manual assembly is required, and mechanical shock exposure is minimal. |
| JM38510/30902BEA | Identical functionality and military qualification, but manufactured under QML Class V with additional screening (e.g., burn-in, radiation hardness assurance) | Required for nuclear-hardened or space-qualified systems where total ionizing dose (TID) tolerance >100 krad(Si) is mandated | Select JM38510/30902BEA when compliance with MIL-PRF-38535 Class V or DoD spaceflight heritage is contractually required. |
Compared with SNJ54LS153J and JM38510/30902BEA, the SNJ54LS153FK offers superior mechanical stability in high-G environments due to its LCCC construction, while maintaining identical logic behavior and timing - making it optimal for embedded avionics where board flexure and thermal cycling dominate reliability concerns.
Availability
SNJ54LS153FK is available at Aetrix Electronics and suitable for avionics data routing, mission computer I/O multiplexing, secure communication interface, and radar signal path switching requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SNJ54LS153FK 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 SNJ54LS153FK belongs to TI's military-grade 54LS logic family, designed specifically for ruggedized digital signal routing in systems where environmental resilience, long-term availability, and traceable pedigree outweigh cost or power-efficiency considerations.
FAQ
What is the maximum clock frequency supported by SNJ54LS153FK?
The SNJ54LS153FK does not operate on a clock signal - it is a combinational logic device. Its usable data rate depends on propagation delay (15 ns max) and system setup/hold timing. In practice, SNJ54LS153FK supports reliable data selection up to approximately 33 MHz in synchronous address-controlled applications, assuming clean edges and controlled trace lengths.
Is SNJ54LS153FK RoHS compliant?
No, SNJ54LS153FK is not RoHS compliant. It uses SnPb (tin-lead) lead finish per MIL-STD-883 requirements and is designated as "No" in TI's official packaging documentation. This reflects its qualification for legacy military systems where Pb-free exemptions apply under JESD67 and DoD directives.
Can SNJ54LS153FK replace SN74LS153N in existing designs?
SNJ54LS153FK cannot directly replace SN74LS153N due to incompatible packages (LCCC-20 vs. PDIP-16), different pin counts, and distinct temperature ratings (–55°C to +125°C vs. 0°C to +70°C). While logic function and DC parameters match, PCB layout redesign and thermal validation are required for integration.
What is the meaning of "SNJ" prefix in SNJ54LS153FK?
The "SNJ" prefix denotes a Texas Instruments military-grade part built to MIL-PRF-38535 standards, with enhanced screening, traceability, and extended temperature qualification. It distinguishes SNJ54LS153FK from commercial (SN74) and standard military (SN54) variants, confirming full QML certification for defense applications.
Does SNJ54LS153FK support hot insertion or live insertion?
No, SNJ54LS153FK is not designed for hot insertion. Its LCCC-20 package lacks built-in current-limiting or ESD protection features required for live-board connection. TI documentation specifies standard static handling per MIL-STD-1686, and operation requires stable VCC and GND prior to signal application.
SNJ54LS153FK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 20-CLCC
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Data Selector/Multiplexer
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 400µA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
SNJ54LS153FK FAQ
1.How can I place an order for SNJ54LS153FK through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54LS153FK 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 SNJ54LS153FK reliable?
The price and inventory of SNJ54LS153FK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54LS153FK is usually 5 days.
3.What payment methods are accepted for SNJ54LS153FK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54LS153FK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54LS153FK?
SNJ54LS153FK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54LS153FK 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 SNJ54LS153FK?
For technical support, including SNJ54LS153FK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54LS153FK requirements.
6.How does Aetrix verify that SNJ54LS153FK is sourced from the original manufacturer or authorized distributors?
All SNJ54LS153FK 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 SNJ54LS153FK meets industry standards.
7.What is the process for return or replacement of SNJ54LS153FK?
All SNJ54LS153FK units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54LS153FK, 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 SNJ54LS153FK part is unused and in its original packaging.
Return procedure for SNJ54LS153FK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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