My Inquiry
My Account
Texas Instruments SNJ54ALS74AW
- Part No.:
- SNJ54ALS74AW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SNJ54ALS74AW.pdf
- Description:
- 54ALS74A DUAL POSITIVE-EDGE-TRIG
- Quantity:
- Payment:
- Shipping:
Inventory:368
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SNJ54ALS74AW from Texas Instruments is a military-grade dual positive-edge-triggered D-type flip-flop IC, operating across −55°C to 125°C, with 25 MHz maximum clock frequency (CL = 50 pF), 6 mW typical power dissipation per flip-flop, and TTL-compatible input/output levels. It implements synchronous data storage in high-reliability control logic, timing synchronization, and register file applications within avionics and defense systems.
For engineers reviewing the SNJ54ALS74AW datasheet, SNJ54ALS74AW pinout, SNJ54ALS74AW application, or SNJ54ALS74AW equivalent, this page delivers verified military-spec timing behavior, absolute maximum ratings, switching characteristics under full temperature range, and CFP package mechanical data - all confirmed from TI's SDAS143C datasheet and Package Option Addendum.
Technical Context
The SNJ54ALS74AW integrates two independent D-type flip-flops with asynchronous preset (PRE) and clear (CLR) inputs active-low. Clock triggering occurs at a defined voltage threshold, not dependent on CLK rise time, enabling robust edge detection in noisy environments. Each flip-flop supports independent data latching on the positive-going clock edge when PRE and CLR are high.
It features non-inverting Q and inverting Q outputs per stage, with guaranteed setup time (10 ns) and hold time (2 ns) for D relative to CLK↑ under −55°C to 125°C operation. Propagation delays (tPLH/tPHL) range from 5–23 ns depending on signal path and load, validated at VCC = 4.5–5.5 V and CL = 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced Low-Power Schottky (ALS), compatible with standard TTL voltage thresholds and drive strength. |
| Max Clock Frequency | 25 MHz at CL = 50 pF - defines maximum synchronous data rate in register chains or state machines. |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across military-grade power rail tolerances. |
| Operating Temperature | −55°C to 125°C - qualified per MIL-PRF-38535 for use in harsh-environment embedded control. |
| Power Dissipation | 6 mW per flip-flop (typical) - enables low-thermal-load digital logic in sealed or conduction-cooled modules. |
| Output Drive | IOL = 4 mA / IOH = −0.4 mA - sufficient to drive multiple TTL inputs or small capacitive loads without buffering. |
| Propagation Delay | tPLH/tPHL ≤ 23 ns (CLK→Q) - determines worst-case timing margin in critical path analysis. |
Pinout & Package
SNJ54ALS74AW uses a 14-pin Ceramic Flatpack (CFP, package code W), hermetically sealed, with 0.050″ lead pitch and 0.300″ body width. Pin 1 identifier is marked via notch or bevel on the package short edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1CLR | Asynchronous active-low clear for first flip-flop - forces 1Q = L, 1Q = H regardless of clock or data. |
| 2 | 1D | Data input for first flip-flop - sampled on rising CLK edge if PRE/CLR inactive. |
| 3 | 1CLK | Clock input for first flip-flop - positive-edge-triggered; voltage-threshold-based, not slew-rate dependent. |
| 4 | 1PRE | Asynchronous active-low preset for first flip-flop - forces 1Q = H, 1Q = L regardless of clock or data. |
| 5 | 1Q | True output of first flip-flop - non-inverting, TTL-compatible VOH/VOL levels. |
| 6 | 1Q | Inverted output of first flip-flop - complementary to 1Q, usable for feedback or differential signaling. |
| 7 | GND | Ground reference - must be low-impedance return for both logic and supply current paths. |
| 8 | VCC | +5 V supply - decoupling capacitor (0.1 µF ceramic) required adjacent to pin for noise immunity. |
| 9 | 2CLR | Asynchronous active-low clear for second flip-flop - independent control from first stage. |
| 10 | 2D | Data input for second flip-flop - electrically isolated but shares same VCC/GND rails. |
| 11 | 2CLK | Clock input for second flip-flop - may be driven from same or separate clock source as 1CLK. |
| 12 | 2PRE | Asynchronous active-low preset for second flip-flop - enables independent initialization. |
| 13 | 2Q | True output of second flip-flop - identical electrical specs to 1Q; supports parallel register expansion. |
| 14 | 2Q | Inverted output of second flip-flop - provides logical complement without external inversion. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Temperature Operation | −55°C to 125°C performance guaranteed - eliminates derating calculations for aerospace thermal cycling. |
| Asynchronous Control | Dedicated PRE/CLR per flip-flop - enables immediate state reset or set without waiting for clock edge. |
| TTL-Compatible I/O | VIH = 2.0 V, VIL = 0.8 V, VOL = 0.4 V @ IOL = 4 mA - interoperable with legacy 74-series and microcontroller GPIOs. |
| Low Power ALS Technology | 6 mW per flip-flop (typical) - reduces board-level heat density vs. standard AS or LS families. |
| Hermetic CFP Packaging | Ceramic Flatpack (W) with glass-sealed lid - meets MIL-STD-883 requirements for moisture resistance and long-term reliability. |
Applications
| Avionics Data Synchronization | Defense System State Machines |
|---|---|
Use Scenario: Capturing sensor telemetry pulses in flight control computers where timing jitter must be minimized across extreme temperature swings. IC Role / Device Role / Timing Role: Dual D-flip-flop used as synchronized input latch and metastability-hardened register stage. Use Value: Guaranteed 25 MHz operation and 10 ns setup time ensure deterministic sampling of 10–20 MHz pulse trains under −55°C cold soak. |
Use Scenario: Implementing finite-state logic in missile guidance subsystems requiring radiation-tolerant, long-lifecycle components. IC Role / Device Role / Timing Role: Core register element in sequential control units managing mode transitions and fault-handling sequences. Use Value: Military temperature rating and hermetic CFP packaging support 20+ year field deployment without parametric drift. |
| Radar Pulse Timing Generator | Secure Communication Protocol Engine |
Use Scenario: Generating precisely timed trigger windows for phased-array radar transmit/receive switching. IC Role / Device Role / Timing Role: Edge-triggered DFF pair configured as delay-matched clock divider and pulse stretcher. Use Value: Matched tPLH/tPHL (5–23 ns) and voltage-threshold clocking enable sub-ns skew control between parallel timing paths. |
Use Scenario: Storing cryptographic key bits and protocol state flags in encrypted comms modules deployed in tactical radios. IC Role / Device Role / Timing Role: Secure register bank with asynchronous PRE/CLR for rapid key wipe on security violation. Use Value: Active-low asynchronous controls allow immediate zeroization independent of system clock integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54AS74AJ | Higher speed: 90 MHz max clock (vs. 25 MHz); higher ICC (10.5 mA typ); AS family propagation delays ~2–10 ns. | Used where throughput >3× ALS is required, but power and noise sensitivity are secondary concerns. | Select SNJ54AS74AJ only when timing budget demands <10 ns CLK→Q delay and system can accommodate +175% power draw. |
| SN54ALS74AJ | Same ALS technology and timing, but in ceramic DIP (J) package instead of CFP (W); identical electrical specs and temp range. | Preferred for through-hole prototyping or legacy board rework where CFP footprint is unavailable. | Choose SN54ALS74AJ for hand-soldered test fixtures or upgrades to existing J-package designs - no logic redesign needed. |
Compared with SNJ54AS74AJ, SNJ54ALS74AW trades speed for lower power and better noise immunity; compared with SN54ALS74AJ, it offers superior high-frequency stability and hermeticity via CFP packaging - critical for vibration-prone or high-humidity deployments.
Availability
SNJ54ALS74AW is available at Aetrix Electronics and suitable for avionics data synchronization, defense system state machines, radar pulse timing generation, and secure communication protocol engine applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SNJ54ALS74AW 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 specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, and defense markets.
The SNJ54ALS74AW belongs to TI's military-grade 54ALS logic family, designed specifically for high-stability, low-power synchronous logic in mission-critical systems operating under extreme environmental stress.
FAQ
What is the maximum clock frequency supported by SNJ54ALS74AW?
The SNJ54ALS74AW supports a maximum clock frequency of 25 MHz when loaded with 50 pF, as specified in the SDAS143C datasheet under recommended operating conditions for the SN54ALS74A variant. This value is guaranteed over the full −55°C to 125°C temperature range and applies directly to the SNJ54ALS74AW in its CFP package configuration.
Does SNJ54ALS74AW have the same pinout as SN74ALS74AN?
Yes, SNJ54ALS74AW shares the identical 14-pin functional pinout with SN74ALS74AN and other members of the '74A dual D-flip-flop family, including pin assignments for 1CLR, 1D, 1CLK, 1PRE, 1Q, 1Q, GND, VCC, 2CLR, 2D, 2CLK, 2PRE, 2Q, and 2Q. Mechanical layout differs due to CFP vs. PDIP packaging, but logic mapping and signal roles are fully consistent.
What is the operating temperature range of SNJ54ALS74AW?
The SNJ54ALS74AW is characterized for operation from −55°C to 125°C, meeting MIL-PRF-38535 Class B requirements. This full military temperature range is explicitly confirmed in the SDAS143C datasheet and TI's Package Option Addendum, and applies to all SNJ54ALS74x variants regardless of package type (J, FK, or W).
Is SNJ54ALS74AW RoHS compliant?
No, SNJ54ALS74AW is not RoHS compliant. Its lead finish is specified as SNPB (tin-lead), and the RoHS column in TI's official Package Option Addendum lists "No" for this part number. It is intended for military and aerospace applications where exemption from RoHS restrictions applies per JEDEC J-STD-609 Category 4.
What package type does SNJ54ALS74AW use?
SNJ54ALS74AW uses a 14-pin Ceramic Flatpack (CFP) package, designated by TI as package code "W". It features a 0.300″ × 0.200″ body, 0.050″ lead pitch, hermetic ceramic construction, and glass-sealed lid - fully documented in TI's Package Outline drawing 4214771/A and Package Option Addendum.
SNJ54ALS74AW 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:
- -
SNJ54ALS74AW FAQ
1.How can I place an order for SNJ54ALS74AW through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ALS74AW 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 SNJ54ALS74AW reliable?
The price and inventory of SNJ54ALS74AW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ALS74AW is usually 5 days.
3.What payment methods are accepted for SNJ54ALS74AW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54ALS74AW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54ALS74AW?
SNJ54ALS74AW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ALS74AW 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 SNJ54ALS74AW?
For technical support, including SNJ54ALS74AW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ALS74AW requirements.
6.How does Aetrix verify that SNJ54ALS74AW is sourced from the original manufacturer or authorized distributors?
All SNJ54ALS74AW 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 SNJ54ALS74AW meets industry standards.
7.What is the process for return or replacement of SNJ54ALS74AW?
All SNJ54ALS74AW units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ALS74AW, 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 SNJ54ALS74AW part is unused and in its original packaging.
Return procedure for SNJ54ALS74AW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SNJ54ALS74AW Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
