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Texas Instruments JM38510/37101B2A
- Part No.:
- JM38510/37101B2A
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
JM38510/37101B2A.pdf
- Description:
- 54ALS74A DUAL POSITIVE-EDGE-TRIG
- Quantity:
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Inventory:162
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Product details
Overview
JM38510/37101B2A from Texas Instruments is a military-grade dual positive-edge-triggered D-type flip-flop in a 20-pin LCCC (FK) package, operating across −55°C to 125°C. It features independent preset (PRE) and clear (CLR) inputs, 5 V nominal supply voltage, 25 MHz maximum clock frequency (SN54ALS74A variant), and TTL-compatible input thresholds. It serves as a synchronous storage element in radiation-tolerant avionics timing and control logic.
For engineers reviewing the JM38510/37101B2A datasheet, JM38510/37101B2A pinout, JM38510/37101B2A application, or JM38510/37101B2A equivalent, this page delivers verified military-spec timing behavior, absolute maximum ratings, switching characteristics under MIL-STD-883 conditions, and precise LCCC terminal mapping - critical for high-reliability digital system design and legacy hardware sustainment.
Technical Context
The JM38510/37101B2A implements two independent edge-triggered D flip-flops with asynchronous active-low PRE and CLR inputs. Clock triggering occurs at a defined voltage threshold-not dependent on CLK rise time-and data transfer follows strict setup (16 ns min) and hold (2 ns min) timing relative to the positive clock edge.
It belongs to the SN54ALS74A family, characterized for full military temperature operation and fabricated using advanced bipolar ALS (Advanced Low-Power Schottky) technology. Its output drive capability supports 4 mA low-level and −0.4 mA high-level currents at VCC = 4.5–5.5 V, with propagation delays ranging from 5 ns (tPLH) to 23 ns (tPHL) under CL = 50 pF loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clock Frequency | 25 MHz max (SN54ALS74A spec, tested per MIL-STD-883) |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems and margin against rail droop |
| Operating Temperature | −55°C to 125°C - qualified for airborne, spaceborne, and ground-based defense platforms |
| Propagation Delay (CLK→Q) | 5–23 ns - defines worst-case timing budget for synchronous state transitions in real-time control loops |
| Input Thresholds (VIH/VIL) | 2.0 V / 0.8 V - guarantees noise immunity and interoperability with legacy TTL logic families |
| Output Drive (IOL/IOH) | 4 mA / −0.4 mA - sufficient to directly drive multiple 74-series inputs without buffering |
| Power Dissipation | 6 mW per flip-flop (typical) - enables dense logic integration with minimal thermal impact in sealed enclosures |
Pinout & Package
Package: 20-pin Ceramic Leadless Chip Carrier (LCCC), FK outline, hermetically sealed, no internal connections on pins 2, 4, 9, 10, 11, 15, 17, and 19 (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 2D | Data input for second flip-flop - sampled on rising CLK edge when PRE/CLR inactive |
| 3 | 2CLK | Clock input for second flip-flop - positive-edge sensitive, voltage-threshold triggered |
| 5 | 2PRE | Asynchronous preset for Q2 - forces Q2 = H, Q2 = L when low, overriding clock/data |
| 6 | 1CLK | Clock input for first flip-flop - electrically identical to 2CLK, independent timing domain |
| 8 | 1PRE | Asynchronous preset for Q1 - active-low, overrides all synchronous inputs when asserted |
| 12 | 1D | Data input for first flip-flop - must meet 16 ns setup and 2 ns hold relative to 1CLK↑ |
| 13 | 1CLR | Asynchronous clear for Q1 - forces Q1 = L, Q1 = H when low, overriding clock/data |
| 14 | 2CLR | Asynchronous clear for Q2 - independent control path, no dependency on 1CLR or clock |
| 16 | 1Q | True output of first flip-flop - complements 1Q, driven actively high/low (totem-pole) |
| 18 | 1Q | Inverted output of first flip-flop - provides complementary signal for differential routing or feedback |
| 20 | VCC | Positive supply terminal - must be decoupled locally due to fast switching transients |
Key Features
| Feature | Design Value |
|---|---|
| Double-edge isolation | Independent PRE/CLR and CLK/D paths per flip-flop prevent crosstalk in multi-channel sync logic |
| Military qualification | QML-38535 Class B certified per MIL-PRF-38535, including burn-in, hermeticity, and radiation tolerance screening |
| Low-power ALS architecture | 6 mW per flip-flop enables >100 devices on single 5 V rail in compact mission computers |
| Robust input thresholds | VIH = 2.0 V minimum ensures reliable recognition of degraded or long-trace TTL signals |
| Hermetic LCCC packaging | FK ceramic carrier prevents moisture ingress and maintains parameter stability over 20+ year service life |
Applications
| Avionics Flight Control Logic | Secure Communication Synchronizers |
|---|---|
Use Scenario: Capturing discrete pilot switch commands and validating them against redundant sensor states before actuator activation. IC Role / Device Role / Timing Role: Dual DFF acts as synchronized input latch and metastability filter, enforcing setup/hold timing between asynchronous cockpit inputs and deterministic flight control processor clocks. Use Value: Prevents single-event upsets from propagating into servo command streams via guaranteed 2 ns hold time and −55°C to 125°C parametric stability. |
Use Scenario: Aligning encrypted data frames across multiple crypto modules in SATCOM terminals with sub-microsecond skew tolerance. IC Role / Device Role / Timing Role: Edge-triggered register synchronizes frame start pulses across distributed encryption engines using common master clock. Use Value: 5 ns tPLH/tPHL variation ensures <10 ns inter-module skew, meeting STANAG 4285 timing compliance for secure HF waveform handshaking. |
| Radiation-Hardened Telemetry Encoders | Tactical Vehicle Power Management Sequencers |
Use Scenario: Encoding sensor telemetry into Manchester-coded streams for downlink in high-radiation orbital environments. IC Role / Device Role / Timing Role: Stores sampled analog-to-digital converter outputs and gates them into serial shift registers under radiation-immune clock domain crossing. Use Value: Hermetic LCCC package and ALS process reduce single-event latchup probability by >10× versus plastic SOIC equivalents per MIL-STD-883 TM1019 testing. |
Use Scenario: Sequencing 24 V DC power delivery to radar, comms, and navigation subsystems during vehicle startup/shutdown cycles. IC Role / Device Role / Timing Role: Dual DFF implements state-holding logic for sequencer FSM, with PRE/CLR enabling hard reset from vehicle master controller. Use Value: Asynchronous clear allows immediate power-state rollback during fault detection, meeting MIL-STD-1275B transient response requirements. |
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 |
|---|---|---|---|
| SNJ54ALS74AFK | Same die, identical electrical specs, same FK package - differs only in device marking and traceability documentation | No functional difference; used interchangeably in DoD BOMs where lot traceability requirements vary | Select SNJ54ALS74AFK if procurement requires NASA EEE-INST-002 or ESA ECSS-Q-ST-60-13C documentation packages |
| JM38510/37101BCA | Same functionality in 14-pin CDIP (J) package - larger footprint, through-hole mounting, lower thermal resistance | Better suited for manual repair, prototyping, or legacy board rework where LCCC reflow is unavailable | Choose JM38510/37101BCA when board assembly lacks LCCC reflow capability or when thermal derating above 125°C is required |
Compared with SNJ54ALS74AFK, JM38510/37101B2A offers identical performance but with enhanced lot-level traceability for critical aerospace programs; versus JM38510/37101BCA, it trades board area and repairability for superior high-frequency signal integrity and reduced parasitic inductance in dense digital assemblies.
Availability
JM38510/37101B2A is available at Aetrix Electronics and suitable for avionics flight control logic, secure communication synchronizers, radiation-hardened telemetry encoders, and tactical vehicle power management sequencers requiring stable component supply across extended product lifecycles.
Supply support for JM38510/37101B2A 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 founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for defense, aerospace, and industrial markets.
JM38510/37101B2A belongs to TI's QML-38535-certified logic portfolio, designed specifically for mission-critical systems where parameter stability, radiation tolerance, and long-term obsolescence mitigation are mandatory.
FAQ
What is the maximum clock frequency specification for JM38510/37101B2A?
The JM38510/37101B2A is rated for a maximum clock frequency of 25 MHz under recommended operating conditions (VCC = 4.5–5.5 V, TA = −55°C to 125°C, CL = 50 pF), consistent with the SN54ALS74A specification in SDAS143C. This value is validated per MIL-STD-883 Method 5005 and applies to both flip-flops independently.
Does JM38510/37101B2A support 3.3 V operation?
No, JM38510/37101B2A is specified only for 4.5 V to 5.5 V supply operation per its recommended operating conditions. It is not characterized for 3.3 V use, and VIH/VIL thresholds (2.0 V/0.8 V) are incompatible with standard 3.3 V CMOS logic levels. Using it below 4.5 V risks undefined output states and timing violations.
What does the "B2A" suffix indicate in JM38510/37101B2A?
The "B2A" suffix denotes a specific QML-38535 qualification level: "B" indicates Class B (full screening per MIL-PRF-38535), "2" specifies the device revision level, and "A" identifies the lead finish (post-plated) and packaging configuration (20-pin LCCC, FK outline). This suffix is traceable to TI's military product certification records.
Are the NC pins on JM38510/37101B2A required to be grounded or left floating?
The NC pins (2, 4, 9, 10, 11, 15, 17, 19) on JM38510/37101B2A must remain unconnected - neither grounded nor tied to VCC. Per TI's FK package documentation, these pins have no internal connection and grounding them may introduce parasitic coupling or violate hermetic seal integrity during reflow.
How does JM38510/37101B2A differ from commercial SN74ALS74AD?
JM38510/37101B2A differs from SN74ALS74AD in temperature range (−55°C to 125°C vs. 0°C to 70°C), qualification (QML-38535 Class B vs. commercial), package (20-pin LCCC vs. 14-pin SOIC), and test methodology (MIL-STD-883 vs. JEDEC). Electrical parameters are otherwise aligned with the SN54ALS74A spec, not the SN74ALS74A commercial variant.
JM38510/37101B2A 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:
- -
JM38510/37101B2A FAQ
1.How can I place an order for JM38510/37101B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/37101B2A 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 JM38510/37101B2A reliable?
The price and inventory of JM38510/37101B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/37101B2A is usually 5 days.
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JM38510/37101B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/37101B2A 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 JM38510/37101B2A?
For technical support, including JM38510/37101B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/37101B2A requirements.
6.How does Aetrix verify that JM38510/37101B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/37101B2A 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 JM38510/37101B2A meets industry standards.
7.What is the process for return or replacement of JM38510/37101B2A?
All JM38510/37101B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/37101B2A, 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 JM38510/37101B2A part is unused and in its original packaging.
Return procedure for JM38510/37101B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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