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Texas Instruments SNJ54ALS576BJ
- Part No.:
- SNJ54ALS576BJ
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SNJ54ALS576BJ.pdf
- Description:
- 54ALS576B OCTAL D-TYPE EDGE-TRIG
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Inventory:2,158
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Product details
Overview
SNJ54ALS576BJ from Texas Instruments is a military-grade octal D-type edge-triggered flip-flop with 3-state inverting outputs, designed for bus driving in high-reliability systems. It operates across −55°C to 125°C, features 20-pin CDIP (J) package, 22 MHz max clock frequency, 12 mA low-level output drive, and buffered OE/CLK inputs for noise-immune control.
For engineers reviewing the SNJ54ALS576BJ datasheet, SNJ54ALS576BJ pinout, SNJ54ALS576BJ application, or SNJ54ALS576BJ equivalent, this page delivers verified functional identity, military-temperature timing behavior, bus-structured pin validation, and direct alternatives for legacy aerospace and defense bus interface designs.
Technical Context
This device implements eight independent D-type latches triggered on the low-to-high CLK transition, each with separate 3-state inverting output controlled by a common OE input. Internal operations continue unaffected during output disable - enabling data retention or concurrent register updates without bus contention.
The SNJ54ALS576BJ uses ALS (Advanced Low-Power Schottky) logic, delivering TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V), 5 V nominal supply operation, and guaranteed performance over full military temperature range without derating. Its bus-structured pinout minimizes trace skew in parallel data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - enables TTL-compatible interfacing with reduced power vs standard LS. |
| Operating Temperature | −55°C to 125°C - qualified for MIL-STD-883 Class B, suitable for avionics, missile guidance, and space-qualified subsystems. |
| Max Clock Frequency | 22 MHz - supports synchronous data capture in legacy 16-bit and 32-bit parallel bus architectures. |
| Output Drive (IOL) | 12 mA - sufficient to directly drive terminated 50 Ω transmission lines or multiple TTL inputs on shared data buses. |
| 3-State Enable Delay (tPZH) | 4–24 ns - ensures clean bus release before new driver activation, preventing glitches during bus arbitration. |
| Setup Time (tsu) | 15 ns - defines minimum data stability window before CLK↑, critical for reliable capture in high-speed backplane timing budgets. |
| Supply Voltage Range | 4.5 V to 5.5 V - accommodates regulated 5 V rails with ±10% tolerance, typical in military power distribution systems. |
Pinout & Package
Ceramic Dual-In-Line Package (CDIP), 20-pin, 300-mil body width, hermetically sealed, lead material SNPB (tin-lead), RoHS-exempt per MIL-STD-19500.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low global 3-state control - disables all eight Q outputs simultaneously without affecting internal latch state. |
| 2–9 | 1D–8D | Data inputs for each of eight D-type flip-flops - sampled synchronously on CLK↑ edge. |
| 10 | GND | Signal ground reference - tied to system chassis ground in military enclosures for EMI suppression. |
| 11 | VCC | +5 V power supply - requires local 0.1 µF ceramic decoupling adjacent to pin per MIL-HDBK-454A. |
| 12–19 | 1Q–8Q | Inverting 3-state outputs - drive bus lines directly; high-impedance when OE = HIGH. |
| 20 | CLK | Common clock input - rising-edge triggered; buffered to reject noise in electrically noisy platforms. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Inverting Outputs | Enables bidirectional bus sharing without external direction control logic - reduces PCB layer count in backplane designs. |
| Bus-Structured Pinout | D and Q pins arranged in interleaved order (D1/Q1/D2/Q2…) - minimizes trace length mismatch and skew in parallel data routing. |
| Buffered Control Inputs | OE and CLK inputs include Schmitt-trigger-like hysteresis - rejects transients induced by relay switching or motor commutation in vehicle-mounted systems. |
| Synchronous Data Capture | Edge-triggered D latches ensure deterministic timing alignment across all eight channels - essential for coherent sampling in telemetry interfaces. |
| Military Temperature Qualification | Tested and screened per MIL-STD-883 Method 5005 - guarantees parametric compliance at −55°C and 125°C without burn-in derating. |
Applications
| Avionics Data Bus Interface | Missile Guidance Register Bank |
|---|---|
Use Scenario: Interfacing ADC/DAC modules to a 16-bit MIL-STD-1553B auxiliary bus controller in airborne mission computers. IC Role / Device Role / Timing Role: Octal register buffering and bus isolation between analog front-end and digital processing unit, synchronized to system master clock. Use Value: Eliminates need for discrete level shifters or bus transceivers; 22 MHz clock support matches legacy 1553B subcarrier timing margins. |
Use Scenario: Storing real-time inertial measurement unit (IMU) sensor outputs prior to telemetry packetization in tactical missiles. IC Role / Device Role / Timing Role: High-reliability data latch array holding attitude/acceleration samples during mid-flight computation cycles. Use Value: −55°C to 125°C operation ensures functionality during rapid atmospheric transit; 3-state outputs prevent bus contention during packet transmission. |
| Ground-Based Radar Signal Conditioning | Nuclear Power Plant Control Logic |
Use Scenario: Capturing digitized RF echo samples from phased-array radar receivers before FFT processing in ground station cabinets. IC Role / Device Role / Timing Role: Synchronized sample-and-hold buffer feeding FPGA-based signal processors via parallel LVDS-compatible bus. Use Value: 12 mA IOL drives long, unterminated coaxial stubs common in radar cabinet interconnects; bus-structured pinout simplifies impedance-controlled layout. |
Use Scenario: Isolating safety-critical reactor control signals from monitoring instrumentation in Class 1E nuclear plant systems. IC Role / Device Role / Timing Role: Radiation-tolerant (via ceramic package) register stage ensuring deterministic I/O handshaking between redundant PLCs and field sensors. Use Value: Hermetic CDIP packaging meets IEEE 344 seismic qualification requirements; no internal clear function avoids unintended reset during EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type bus-interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54AS576J | AS family - higher speed (100 MHz fmax), greater IOL (32 mA), but higher ICC (77–125 mA) and tighter VIH/VIL thresholds. | Better suited for high-throughput radar pulse processing where timing margin is constrained; less tolerant of marginal input noise. | Select when clock rates exceed 22 MHz and system power budget allows +50% supply current. |
| SN74ALS576BN | Commercial version - identical logic, same pinout, but rated only 0°C to 70°C and packaged in plastic DIP (N). | Applicable only in non-military industrial control cabinets with stable ambient temperature and no shock/vibration certification needs. | Choose for cost-sensitive ground-test equipment or lab prototypes where military screening is unnecessary. |
Compared with SNJ54AS576J, SNJ54ALS576BJ trades speed for lower power and superior noise immunity; compared with SN74ALS576BN, it provides full environmental ruggedness required for flight-critical deployment - making it the sole option for certified airborne hardware.
Availability
SNJ54ALS576BJ is available at Aetrix Electronics and suitable for avionics integration, missile subsystem design, and nuclear instrumentation requiring stable component supply under extended lifecycle management.
Supply support for SNJ54ALS576BJ 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 defense, aerospace, and industrial markets.
The SNJ54ALS576BJ belongs to TI's military-qualified ALS logic family, engineered specifically for deterministic bus interfacing in harsh-environment computing systems where timing predictability and thermal resilience are non-negotiable.
FAQ
What is the maximum clock frequency supported by SNJ54ALS576BJ?
The SNJ54ALS576BJ supports a maximum clock frequency of 22 MHz across its full −55°C to 125°C operating range, as specified in the SDAS065B datasheet under recommended operating conditions. This value reflects guaranteed timing performance after worst-case process, voltage, and temperature (PVT) corner testing per MIL-STD-883.
Does SNJ54ALS576BJ include a synchronous clear (CLR) function?
No, SNJ54ALS576BJ does not include a CLR input. The SN74ALS577A variant adds synchronous clear, but SNJ54ALS576BJ implements only D-type latching with OE and CLK - confirmed by its function table, logic diagram, and pinout showing no CLR terminal.
What package type is used for SNJ54ALS576BJ?
SNJ54ALS576BJ is supplied in a 20-pin Ceramic Dual-In-Line Package (CDIP or J package), 300-mil width, with tin-lead (SNPB) leads and hermetic ceramic construction - documented in TI's PACKAGE OPTION ADDENDUM and datasheet package diagrams.
Can SNJ54ALS576BJ be used with 3.3 V logic systems?
No, SNJ54ALS576BJ is strictly a 5 V TTL-family device. Its VIH minimum is 2.0 V and VIL maximum is 0.8 V, but it requires VCC = 4.5–5.5 V and is not 3.3 V tolerant. Driving it from 3.3 V logic may result in undefined switching or excessive input current due to internal clamp diodes.
Is SNJ54ALS576BJ pin-compatible with SN74ALS576BN?
Yes, SNJ54ALS576BJ and SN74ALS576BN share identical 20-pin DIP pinouts and electrical functionality - differing only in temperature rating (−55°C to 125°C vs 0°C to 70°C) and package material (ceramic vs plastic). Both use the same bus-structured pin assignment per SDAS065B Figure 1.
SNJ54ALS576BJ 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:
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- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
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- Current - Quiescent (Iq):
- -
- Input Capacitance:
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- Operating Temperature:
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- Grade:
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- Qualification:
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- Mounting Type:
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- Supplier Device Package:
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SNJ54ALS576BJ FAQ
1.How can I place an order for SNJ54ALS576BJ through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ALS576BJ 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 SNJ54ALS576BJ reliable?
The price and inventory of SNJ54ALS576BJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ALS576BJ is usually 5 days.
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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 SNJ54ALS576BJ?
For technical support, including SNJ54ALS576BJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ALS576BJ requirements.
6.How does Aetrix verify that SNJ54ALS576BJ is sourced from the original manufacturer or authorized distributors?
All SNJ54ALS576BJ 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 SNJ54ALS576BJ meets industry standards.
7.What is the process for return or replacement of SNJ54ALS576BJ?
All SNJ54ALS576BJ units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ALS576BJ, 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 SNJ54ALS576BJ part is unused and in its original packaging.
Return procedure for SNJ54ALS576BJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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