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Texas Instruments JM38510/65305BFA
- Part No.:
- JM38510/65305BFA
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
JM38510/65305BFA.pdf
- Description:
- J-K FLIP-FLOP, HC/UH SERIES, 2 F
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Product details
Overview
JM38510/65305BFA from Texas Instruments is a military-grade dual J-K negative-edge-triggered flip-flop in a 16-pin CDIP package, operating across −55°C to 125°C with supply voltage range 2 V to 6 V, 13 ns typical propagation delay, ±4-mA output drive at 5 V, and low 40-µA max ICC - used in radiation-tolerant avionics timing and synchronous control circuits.
For engineers reviewing the JM38510/65305BFA datasheet, JM38510/65305BFA pinout, JM38510/65305BFA application, or JM38510/65305BFA equivalent, key selection criteria include its MIL-PRF-38535 Class B qualification, negative-edge clocking behavior, independent preset/clear functionality per flip-flop, and compatibility with LSTTL load driving requirements in harsh-environment digital systems.
Technical Context
The JM38510/65305BFA implements two fully independent J-K flip-flops, each with asynchronous active-low preset (PRE) and clear (CLR) inputs that override clocked operation. Data at J and K inputs is latched on the negative-going edge of CLK only when both PRE and CLR are high.
Its logic design supports toggle mode (J=K=HIGH), memory retention during hold time (th = 0 ns), and robust noise immunity via defined VIH/VIL thresholds (e.g., VIH = 4.2 V at VCC = 6 V). Clock triggering is voltage-level–based-not dependent on CLK fall time-ensuring reliable edge detection under varying slew conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and battery-backed operation in aerospace power domains. |
| Propagation Delay (tpd) | 13 ns typical at VCC = 5 V - enables reliable 20 MHz clock operation in real-time control sequencers. |
| Output Drive Strength | ±4 mA at VCC = 5 V - directly drives up to 10 LSTTL loads without buffering in legacy avionics backplanes. |
| Quiescent Current (ICC) | 40 µA max - minimizes standby power in thermally constrained flight computers. |
| Operating Temperature | −55°C to +125°C - qualified for missile guidance, satellite payload, and engine control environments. |
| Input Clamp Current | ±20 mA - protects against ESD and transient overvoltage events per MIL-STD-883 Method 3015. |
| Setup Time (tsu) | 17 ns min at VCC = 6 V - defines minimum data stability window before CLK↓ for deterministic state capture. |
Pinout & Package
Package: 16-pin Ceramic Dual In-line Package (CDIP), hermetically sealed, MIL-STD-883 compliant, 0.300-inch wide body, through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1CLK | Negative-edge clock input for Flip-Flop 1 - triggers state update only on falling edge; level-insensitive to slow transitions. |
| 2 | 1K | Complement data input for Flip-Flop 1 - determines Q output state on next CLK↓ when PRE/CLR inactive. |
| 3 | 1J | True data input for Flip-Flop 1 - sampled synchronously with 1CLK; J=K=1 enables toggle mode. |
| 4 | 1PRE | Asynchronous preset for Flip-Flop 1 - forces Q = HIGH regardless of clock or J/K when LOW. |
| 5 | 1Q̅ | Inverted output of Flip-Flop 1 - complementary to 1Q; supports differential signaling or feedback paths. |
| 6 | 1Q | True output of Flip-Flop 1 - retains state between clocks; used for register storage or state-machine encoding. |
| 7 | 1K | Complement data input for Flip-Flop 1 - duplicates Pin 2; confirmed identical function per TI SCLS099F pin diagram. |
| 8 | GND | Ground reference - must be low-impedance connection to minimize switching noise coupling into sensitive analog sections. |
| 9 | VCC | Positive supply - requires local 0.1-µF ceramic decoupling adjacent to pin to suppress high-frequency transients. |
| 10 | 1CLR | Asynchronous clear for Flip-Flop 1 - forces Q = LOW regardless of clock or J/K when LOW. |
| 11 | 2CLR | Asynchronous clear for Flip-Flop 2 - independent control allows selective reset of second stage without disturbing first. |
| 12 | 2Q | True output of Flip-Flop 2 - provides second independent storage element for counters or shift registers. |
| 13 | 2Q̅ | Inverted output of Flip-Flop 2 - enables direct implementation of T-type or D-type behavior using external gating. |
| 14 | 2PRE | Asynchronous preset for Flip-Flop 2 - independent of Flip-Flop 1, supporting dual-channel initialization. |
| 15 | 2J | True data input for Flip-Flop 2 - fully isolated signal path; no internal crosstalk with Flip-Flop 1 inputs. |
| 16 | 2CLK | Negative-edge clock input for Flip-Flop 2 - may be driven from same or separate clock source as 1CLK. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range (2–6 V) | Enables interoperability with 3.3 V and 5 V logic families without level-shifting in mixed-signal avionics modules. |
| Negative-Edge Triggering | Eliminates metastability risk from asynchronous clock domain crossings in deterministic real-time sequencers. |
| Independent Asynchronous Controls | Allows per-flip-flop initialization or fault recovery without halting the entire timing chain - critical for fail-operational systems. |
| Low Input Current (≤1 µA) | Reduces loading on upstream drivers and enables long trace routing in large-format PCBs without signal degradation. |
| MIL-PRF-38535 Class B Qualification | Guarantees screening for burn-in, temperature cycling, and radiation hardness - required for DoD and NASA flight programs. |
Applications
| Avionics Flight Control Sequencing | Missile Guidance State Machines |
|---|---|
|
Use Scenario: Synchronizing actuator enable signals with inertial measurement unit (IMU) sample clocks in triple-redundant flight computers. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing edge-aligned, glitch-free register staging for command validation and execution timing. Use Value: Ensures deterministic setup/hold margins (tsu = 17 ns, th = 0 ns) and eliminates race conditions between sensor sampling and control output assertion. |
Use Scenario: Implementing finite-state logic for seeker head tracking modes (search → acquisition → lock) under high-G vibration. IC Role / Device Role / Timing Role: Independent preset/clear enables rapid reinitialization of tracking state upon target loss or jamming detection. Use Value: Asynchronous controls allow sub-100 ns state reset without waiting for clock edges - critical for responsive countermeasures. |
| Satellite Onboard Telemetry Buffering | Engine Control Unit (ECU) Ignition Timing |
|
Use Scenario: Staging telemetry packet headers prior to downlink transmission in radiation-hardened comms subsystems. IC Role / Device Role / Timing Role: Dual-register storage holding header validity flags and frame sync markers across multiple clock domains. Use Value: 13 ns tpd and ±4-mA drive ensure clean, jitter-free flag propagation into FPGA-based packetizers with minimal external components. |
Use Scenario: Generating precise spark timing windows synchronized to crankshaft position encoder pulses in jet turbine ECUs. IC Role / Device Role / Timing Role: Toggle-mode J-K configuration divides encoder frequency while maintaining phase coherence with mechanical rotation. Use Value: Wide 2–6 V operation accommodates degraded bus voltage during cold starts; 40-µA ICC extends battery runtime during pre-flight checks. |
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 |
|---|---|---|---|
| SNJ54HC112J | Same die, identical pinout and electrical specs, but qualified to MIL-PRF-38535 Class V (not Class B); lower screening rigor. | Approved for non-safety-critical ground support equipment where full Class B radiation testing is not mandated. | Select SNJ54HC112J only if program specifications explicitly permit Class V qualification and reduced reliability screening. |
| JM38510/65305BEA | Identical functional spec and package, but marked with BEA suffix - reflects later production lot with updated process control documentation. | No functional or environmental difference; accepted interchangeably in all Class B programs requiring JM38510/65305BFA. | Prefer JM38510/65305BEA when sourcing new production lots - same qualification, improved traceability and test coverage. |
Compared with JM38510/65305BFA, SNJ54HC112J offers cost savings at the expense of Class B radiation assurance, while JM38510/65305BEA delivers identical performance with enhanced manufacturing traceability - making it the preferred drop-in replacement for new designs.
Availability
JM38510/65305BFA is available at Aetrix Electronics and suitable for avionics flight control, missile guidance, satellite telemetry, and engine control unit applications requiring stable component supply across extended temperature and radiation environments.
Supply support for JM38510/65305BFA 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 manufacturer specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.
The JM38510/65305BFA belongs to TI's military HC logic family - designed specifically to meet MIL-PRF-38535 Class B requirements for high-reliability, radiation-tolerant digital sequencing in mission-critical platforms.
FAQ
What is the maximum clock frequency supported by JM38510/65305BFA?
JM38510/65305BFA supports up to 24 MHz maximum clock frequency at VCC = 6 V and TA = 125°C, verified per TI SCLS099F timing characteristics table. At nominal 5 V and 25°C, fmax reaches 20 MHz. This ensures reliable operation in high-speed digital control loops within avionics and missile systems where deterministic timing is mandatory.
Does JM38510/65305BFA support 3.3 V operation?
Yes, JM38510/65305BFA operates reliably at 3.3 V, as confirmed by its specified 2 V to 6 V supply range and validated VIH/VIL thresholds (e.g., VIH = 2.31 V min at VCC = 3.3 V per TI recommended operating conditions). It interfaces directly with 3.3 V microcontrollers and FPGAs without level translation in mixed-voltage avionics subsystems.
Is JM38510/65305BFA pin-compatible with commercial SN74HC112N?
JM38510/65305BFA uses the same 16-pin CDIP footprint and identical pinout as SN74HC112N per TI SCLS099F pin diagrams, but differs in screening, temperature range (−55°C to +125°C vs. −40°C to +85°C), and qualification level. Mechanical and electrical pin compatibility is confirmed; however, substitution requires verification of program-specific qualification requirements.
What is the meaning of the "BFA" suffix in JM38510/65305BFA?
The "BFA" suffix denotes a specific revision and screening level under MIL-PRF-38535: "B" indicates Class B qualification (full radiation and reliability testing), "F" identifies the device type (flip-flop), and "A" specifies the drawing revision per Defense Logistics Agency standards. This suffix confirms compliance with DoD procurement requirements for flight-critical hardware.
Can JM38510/65305BFA be used in toggle mode?
Yes, JM38510/65305BFA supports toggle mode by connecting both J and K inputs HIGH on either or both flip-flops. The function table in TI SCLS099F explicitly lists "Toggle" as an output behavior when PRE and CLR are HIGH and J=K=H. This enables simple frequency division and state inversion without external logic gates.
JM38510/65305BFA 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:
- -
JM38510/65305BFA FAQ
1.How can I place an order for JM38510/65305BFA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65305BFA 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 JM38510/65305BFA reliable?
The price and inventory of JM38510/65305BFA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65305BFA is usually 5 days.
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JM38510/65305BFA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/65305BFA 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 JM38510/65305BFA?
For technical support, including JM38510/65305BFA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65305BFA requirements.
6.How does Aetrix verify that JM38510/65305BFA is sourced from the original manufacturer or authorized distributors?
All JM38510/65305BFA 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 JM38510/65305BFA meets industry standards.
7.What is the process for return or replacement of JM38510/65305BFA?
All JM38510/65305BFA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65305BFA, 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 JM38510/65305BFA part is unused and in its original packaging.
Return procedure for JM38510/65305BFA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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