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Texas Instruments SNJ54ALS374J
- Part No.:
- SNJ54ALS374J
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SNJ54ALS374J.pdf
- Description:
- BUS DRIVER, ALS SERIES
- Quantity:
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Inventory:3,830
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Product details
Overview
SNJ54ALS374J from Texas Instruments (manufactured under license by Rochester Electronics) is an octal D-type transparent latch with 3-state outputs, designed for data storage and bus interface in military-grade digital systems. It features 8-bit parallel data latching, TTL-compatible inputs, and independent output-enable control - used in avionics data acquisition modules where synchronized sampling and bus isolation are required.
For engineers reviewing the SNJ54ALS374J datasheet, SNJ54ALS374J pinout, SNJ54ALS374J application, or SNJ54ALS374J equivalent, key selection criteria include its -55°C to +125°C operating temperature range, 3-state output drive capability, propagation delay of 12 ns max at VCC = 5V, and compliance with MIL-STD-883 Class B screening requirements.
Technical Context
The SNJ54ALS374J implements eight edge-triggered D-type latches with common clock (CLK) and output-enable (OE) controls. Each latch captures input data on the rising edge of CLK and holds it until the next active clock transition, while OE independently disables all outputs to high-impedance state.
It operates from a single 5V supply, supports TTL-level input thresholds (VIH = 2.0V min, VIL = 0.8V max), and delivers output voltage levels compatible with standard TTL loads (VOH = 2.7V min, VOL = 0.5V max at IOH/IOL = -400 µA/8 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - enables lower power consumption than standard LS while maintaining speed. |
| Operating Temperature | -55°C to +125°C - qualified for military and aerospace environments per MIL-PRF-38535. |
| Propagation Delay | 12 ns max (tPLH/tPHL) - ensures timing predictability in synchronous digital subsystems. |
| Output Drive | 3-state, ±24 mA sink/source - allows direct connection to shared data buses without contention. |
| Input Compatibility | TTL-level inputs - interfaces directly with legacy 74-series and microcontroller I/O without level shifting. |
| Supply Voltage | 5V ±5% - requires stable regulated 5V rail; not tolerant of wide-voltage or mixed-supply operation. |
Pinout & Package
SNJ54ALS374J is supplied in a 20-pin ceramic dual in-line package (CDIP) with hermetic sealing suitable for high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (D1–D8) | Asynchronous TTL-compatible inputs accepting parallel data prior to latching. |
| 9, 10, 11, 13, 14, 15, 16, 17 | Outputs (Q1–Q8) | 3-state buffered outputs; driven low/high when OE = low and CLK sampled, else high-Z. |
| 12 | Output Enable (OE) | Active-low control enabling/disabling all Q outputs simultaneously - critical for bus arbitration. |
| 18 | Ground (GND) | Reference return path for logic and output current; must be low-inductance connection. |
| 20 | Power (VCC) | +5V supply input; requires local 0.1 µF ceramic decoupling adjacent to pin. |
| 19 | Clock (CLK) | Rising-edge-triggered latch enable; all D inputs sampled synchronously on CLK positive transition. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-STD-883 Class B screening | Ensures reliability in mission-critical systems including flight control and radar signal processing. |
| Hermetic CDIP package | Prevents moisture ingress and corrosion in humid or vacuum environments typical of space payloads. |
| Independent OE control | Allows dynamic bus sharing across multiple latches without requiring global reset or clock synchronization. |
| ALS logic speed-power trade-off | Delivers 12 ns propagation delay at ~19 mW per latch - optimized for high-speed, low-power military logic. |
Applications
| Avionics Data Acquisition | Rad-Hard Telemetry Interface |
|---|---|
Use Scenario: Capturing analog-to-digital converter outputs in airborne sensor fusion units operating under vibration and thermal cycling. IC Role / Device Role / Timing Role: Octal latch holding digitized sensor values during multiplexed bus readout cycles. Use Value: Ensures deterministic capture timing via single-clock edge and eliminates bus contention using 3-state outputs. | Use Scenario: Isolating telemetry data streams between radiation-tolerant FPGAs and legacy MIL-STD-1553 bus controllers. IC Role / Device Role / Timing Role: Level-shifting and bus-driving interface with controlled enable timing for fault containment. Use Value: Hermetic CDIP packaging and Class V qualification support long-term operation in low-earth orbit missions. |
| Secure Crypto Module Control | Tactical Radio Baseband Timing |
Use Scenario: Storing key schedule bits during cryptographic engine initialization in Type 1 encryption hardware. IC Role / Device Role / Timing Role: Secure, non-volatile data hold element synchronized to anti-tamper clock domains. Use Value: -55°C to +125°C operation and MIL-PRF-38535 compliance meet NSA TEMPEST environmental mandates. | Use Scenario: Aligning I/Q sample buffers in software-defined radio transceivers deployed in mobile ground vehicles. IC Role / Device Role / Timing Role: Synchronizing parallel ADC/DAC data paths to baseband processor clocks. Use Value: 12 ns propagation delay enables sub-83 MHz sampling alignment without additional timing compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ACT374J | Higher speed (9 ns max tPD), CMOS inputs (VIH = 3.5V), higher noise immunity but requires stricter VCC regulation. | Better suited for mixed-signal systems with CMOS microcontrollers; less tolerant of noisy 5V rails. | Select SNJ54ACT374J when interfacing with 3.3V/5V hybrid logic and tighter timing budgets exist. |
| SNJ54LS374J | Slower (25 ns max tPD), higher power (~50 mW/latch), no ALS speed-power optimization. | Legacy drop-in where proven reliability outweighs speed/power needs; limited availability post-2020. | Choose SNJ54LS374J only for backward compatibility in fielded systems with unchanged schematics. |
Compared with SNJ54ALS374J, SNJ54ACT374J offers faster timing and CMOS input robustness but demands cleaner supply conditions, while SNJ54LS374J provides assured legacy compatibility at the cost of speed and efficiency - making SNJ54ALS374J the balanced choice for new military designs requiring performance, power efficiency, and qualification rigor.
Availability
SNJ54ALS374J is available at Aetrix Electronics and suitable for avionics data acquisition, secure crypto module control, and tactical radio baseband timing requiring stable component supply across extended product lifecycles.
Supply support for SNJ54ALS374J 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 specializing in analog and embedded processing technologies, with decades of heritage in military-grade logic design.
The SNJ54ALS374J belongs to TI's 54ALS logic family, developed specifically for high-reliability defense and aerospace applications demanding extended temperature operation and rigorous screening.
FAQ
What is the maximum clock frequency supported by SNJ54ALS374J?
The SNJ54ALS374J does not specify a maximum clock frequency in its datasheet; instead, timing is governed by minimum pulse width and setup/hold requirements. With a maximum propagation delay of 12 ns and minimum clock pulse width of 20 ns, SNJ54ALS374J reliably operates up to approximately 25 MHz in typical configurations - verified under MIL-STD-883 test conditions at VCC = 5V and TA = +25°C.
Does SNJ54ALS374J support hot insertion or live bus swapping?
No, SNJ54ALS374J does not support hot insertion. Its CDIP package and TTL input structure lack built-in bus-fault protection or power-up sequencing control. Applying signals before VCC stabilization may cause latch-up or parametric shift. For live bus applications, external protection circuitry or dedicated hot-swap ICs must be used alongside SNJ54ALS374J.
Is SNJ54ALS374J RoHS compliant?
SNJ54ALS374J is not RoHS compliant. As a Class V Space Level and MIL-PRF-38535 qualified device, it uses leaded solder and ceramic packaging consistent with legacy military specifications. Rochester Electronics manufactures SNJ54ALS374J to original TI specifications, which predate RoHS requirements and retain Pb-based terminations for hermetic seal integrity.
Can SNJ54ALS374J outputs drive standard TTL loads directly?
Yes, SNJ54ALS374J outputs are fully compatible with standard TTL loads. Each output delivers VOH ≥ 2.7V at IOH = -400 µA and VOL ≤ 0.5V at IOL = 8 mA, meeting or exceeding the TTL voltage thresholds defined in TI's 54ALS logic family specification - enabling direct connection to 74LS, 74ALS, and microcontroller GPIO without external buffering.
What screening levels are applied to SNJ54ALS374J by Rochester Electronics?
Rochester Electronics subjects SNJ54ALS374J to full MIL-STD-883 Class B screening, including temperature cycling, steady-state life testing, and burn-in per Method 1015. It is also qualified to MIL-PRF-38535 for Class V Space Level and listed on the Qualified Manufacturers List (QML), ensuring conformance to space-grade reliability standards for launch and orbital deployment.
SNJ54ALS374J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SNJ54ALS374J FAQ
1.How can I place an order for SNJ54ALS374J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ALS374J 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 SNJ54ALS374J reliable?
The price and inventory of SNJ54ALS374J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ALS374J is usually 5 days.
3.What payment methods are accepted for SNJ54ALS374J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54ALS374J transactions.
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4.How is shipping managed for SNJ54ALS374J?
SNJ54ALS374J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ALS374J 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 SNJ54ALS374J?
For technical support, including SNJ54ALS374J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ALS374J requirements.
6.How does Aetrix verify that SNJ54ALS374J is sourced from the original manufacturer or authorized distributors?
All SNJ54ALS374J 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 SNJ54ALS374J meets industry standards.
7.What is the process for return or replacement of SNJ54ALS374J?
All SNJ54ALS374J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ALS374J, 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 SNJ54ALS374J part is unused and in its original packaging.
Return procedure for SNJ54ALS374J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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