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Texas Instruments 8400001EA
- Part No.:
- 8400001EA
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
8400001EA.pdf
- Description:
- SN54ALS109A DUAL J-K POSITIVE-ED
- Quantity:
- Payment:
- Shipping:
Inventory:4,710
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Product details
Overview
8400001EA from Texas Instruments is a dual J-K positive-edge-triggered flip-flop IC designed for synchronous logic control in military-grade digital systems. It features two independent flip-flops, 30 MHz maximum clock frequency, −55°C to 125°C operating temperature range, and TTL-compatible input thresholds. It is used in radar timing sequencers, avionics control state machines, and hardened data path synchronization.
For engineers reviewing the 8400001EA datasheet, 8400001EA pinout, 8400001EA application, or 8400001EA equivalent, this page delivers verified electrical specs, military-qualified package details (CDIP-J), functional behavior under PRE/CLR override, and direct alternatives with documented timing and drive differences.
Technical Context
This device implements two fully independent J-K flip-flops with asynchronous preset (PRE) and clear (CLR) inputs that override clocked operation. Each flip-flop responds to the positive-going edge of CLK while meeting 15 ns setup time and zero hold time for J/K inputs.
It operates at VCC = 4.5–5.5 V with guaranteed 30 MHz clock frequency (SN54ALS109A grade), 2.4–4 mA typical ICC, and output drive capability of 4 mA sink / −0.4 mA source under standard load conditions (CL = 50 pF, RL = 500 Ω).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - balances speed and power for high-reliability military logic |
| Clock Frequency Max | 30 MHz - supports real-time control loops in radar pulse generators and telemetry encoders |
| Operating Temperature | −55°C to 125°C - qualified per MIL-PRF-38535 for airborne and spaceborne platforms |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with regulated 5 V military power buses without derating |
| Output Drive | 4 mA sink / −0.4 mA source - sufficient to directly drive multiple 74ALS inputs or discrete level-shifting stages |
| Propagation Delay | 5–21 ns (CLK→Q) - enables sub-33 ns state transitions critical in deterministic finite-state machines |
| Input Thresholds | VIL = 0.7 V, VIH = 2.0 V - ensures noise margin >400 mV in electrically noisy vehicle/platform environments |
Pinout & Package
8400001EA is supplied in a 16-pin Ceramic Dual-In-Line Package (CDIP-J), hermetically sealed for moisture resistance and thermal stability across extreme temperature excursions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1CLR / 2CLR | Asynchronous active-low clear - forces Q = L, Q̅ = H independent of clock or J/K |
| 2, 14 | 1J / 2J | Data input for toggle or D-type configuration - must be stable ≥15 ns before CLK↑ |
| 3, 13 | 1K / 2K | Complement data input - determines toggle (J=H,K=H), set (J=H,K=L), or reset (J=L,K=H) |
| 4, 12 | 1CLK / 2CLK | Positive-edge-triggered clock - transition detection is voltage-threshold-based, not slew-rate dependent |
| 5, 11 | 1PRE / 2PRE | Asynchronous active-low preset - forces Q = H, Q̅ = L regardless of other inputs |
| 6, 10 | 1Q / 2Q | True output - provides complementary logic state synchronized to CLK edge when PRE/CLR inactive |
| 7, 9 | 1Q̅ / 2Q̅ | Inverted output - matches Q̅ definition in truth table; usable as feedback or differential signaling pair |
| 8 | GND | Signal reference ground - requires low-inductance connection to minimize switching noise coupling |
| 16 | VCC | +5 V supply - bypassing with 0.1 µF ceramic capacitor at package pin is mandatory for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous PRE/CLR | Enables hard reset or forced initialization without waiting for clock edge - essential for fault recovery in safety-critical controllers |
| J-K Toggle Mode | Configured by grounding K and tying J high - provides precise divide-by-2 clock generation without external gates |
| D-Flip-Flop Compatibility | Achieved by connecting J to K - simplifies migration from D-type designs while retaining same pin count and layout |
| Military Temperature Qualification | Tested and characterized over −55°C to 125°C - eliminates need for derating or thermal margin analysis in chassis-mounted applications |
| ALS Speed-Power Tradeoff | 6 mW per flip-flop at 50 MHz equivalent - delivers 2× speed of LS logic with only 1.5× power, optimizing SWaP-C in embedded systems |
Applications
| Radar Pulse Sequencing | Avionics Control State Machine |
|---|---|
|
Use Scenario: Generating precisely timed trigger pulses for magnetron firing and receiver gating in X-band pulse-Doppler radar. IC Role / Device Role / Timing Role: Dual J-K flip-flop acts as synchronized divider and phase-aligned delay element within the master timing generator. Use Value: 30 MHz max clock and 5–21 ns propagation delay enable sub-33 ns resolution for pulse width and inter-pulse interval control. |
Use Scenario: Managing flight control surface actuation sequence in fly-by-wire ECUs with lockstep redundancy monitoring. IC Role / Device Role / Timing Role: Provides deterministic state storage for mode selection, fault latch, and watchdog timeout counters. Use Value: Asynchronous PRE/CLR allows immediate state reset on sensor disagreement or power-up, ensuring fail-safe default posture. |
| Secure Telemetry Encoder | Hardened Data Path Synchronizer |
|
Use Scenario: Clock-domain crossing and bit-serialization of encrypted telemetry frames prior to RF modulation. IC Role / Device Role / Timing Role: Edge-triggered storage element aligning parallel data to serial clock domain while preserving integrity. Use Value: Guaranteed setup/hold timing (15 ns su, 0 ns h) prevents metastability in multi-clock boundary transfers under EMI stress. |
Use Scenario: Synchronizing asynchronous sensor interrupts (e.g., inertial measurement unit FIFO full flags) into a deterministic CPU interrupt schedule. IC Role / Device Role / Timing Role: Dual-stage synchronizer using cascaded 8400001EA flip-flops to suppress metastability-induced glitches. Use Value: −55°C to 125°C qualification ensures reliable operation inside sealed avionics bays exposed to rapid thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual J-K flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN54AS109AJ | Higher speed (90 MHz max), higher ICC (11.5–17 mA), lower noise margin (VIL = 0.8 V) | Better suited for high-speed test equipment clock trees; less tolerant of marginal input rise times | Select when clock rate >30 MHz is required and power budget allows +300% increase |
| JM38510/37102BEA | Identical ALS logic, same CDIP-J package, identical electrical specs - QML-38535 Class B certified | Approved for DoD procurement with full traceability and lot acceptance testing per MIL-STD-883 | Choose for programs requiring formal QML documentation and extended reliability screening |
Compared with SN54ALS109AJ, 8400001EA offers identical functionality and military temperature rating but lacks QML certification documentation; SN54AS109AJ trades power efficiency for raw speed, making it unsuitable where thermal management is constrained.
Availability
8400001EA is available at Aetrix Electronics and suitable for radar subsystems, avionics control units, and secure telemetry transmitters requiring stable component supply across extended product lifecycles and harsh environmental deployment.
Supply support for 8400001EA 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 with over 50 years of analog and logic innovation, headquartered in Dallas, Texas.
8400001EA belongs to TI's military-grade ALS logic family, engineered for high-reliability digital control in defense, aerospace, and industrial systems where temperature resilience and long-term parametric stability are mandatory.
FAQ
What is the maximum clock frequency supported by 8400001EA?
The 8400001EA supports a maximum clock frequency of 30 MHz under recommended operating conditions (VCC = 4.5–5.5 V, TA = −55°C to 125°C). This value is guaranteed for the SN54ALS109A variant, which 8400001EA implements in CDIP-J packaging. Performance remains stable across the full military temperature range without derating.
Does 8400001EA support asynchronous preset and clear functions?
Yes, 8400001EA provides fully asynchronous active-low preset (PRE) and clear (CLR) inputs on each flip-flop. When asserted, these inputs force Q = H / Q̅ = L (PRE) or Q = L / Q̅ = H (CLR) immediately, overriding all clocked behavior. This function is validated across −55°C to 125°C and is critical for system-level fault recovery.
What package type is used for 8400001EA?
8400001EA is packaged in a 16-pin Ceramic Dual-In-Line Package (CDIP-J), per TI's packaging addendum. This hermetic ceramic package provides superior moisture resistance, thermal conductivity, and mechanical stability compared to plastic variants, making it suitable for high-reliability military applications.
Can 8400001EA be configured as a D-type flip-flop?
Yes, 8400001EA can operate as a D-type flip-flop by connecting the J and K inputs together. In this configuration, the combined J/K node serves as the D input, and the device latches its value on the positive clock edge. This is explicitly confirmed in the device description and function table of the SDAS198B datasheet.
What is the supply voltage range for reliable operation of 8400001EA?
8400001EA operates reliably over a supply voltage range of 4.5 V to 5.5 V DC. This range is specified in the "Recommended Operating Conditions" table for the SN54ALS109A grade. Operation outside this window - including the absolute maximum rating of 7 V - risks parametric shift or permanent damage and is not supported.
8400001EA 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:
- -
8400001EA FAQ
1.How can I place an order for 8400001EA through Aetrix?
Please submit a Request for Quotation (RFQ) for 8400001EA 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 8400001EA reliable?
The price and inventory of 8400001EA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8400001EA is usually 5 days.
3.What payment methods are accepted for 8400001EA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8400001EA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8400001EA?
8400001EA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8400001EA 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 8400001EA?
For technical support, including 8400001EA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8400001EA requirements.
6.How does Aetrix verify that 8400001EA is sourced from the original manufacturer or authorized distributors?
All 8400001EA 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 8400001EA meets industry standards.
7.What is the process for return or replacement of 8400001EA?
All 8400001EA units undergo pre-shipment inspection (PSI). If there is an issue with 8400001EA, 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 8400001EA part is unused and in its original packaging.
Return procedure for 8400001EA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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