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Texas Instruments JM38510/65352B2A
- Part No.:
- JM38510/65352B2A
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
JM38510/65352B2A.pdf
- Description:
- 54HCT74 DUAL D-TYPE POSITIVE-EDG
- Quantity:
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Product details
Overview
JM38510/65352B2A from Texas Instruments is a military-grade dual D-type positive-edge-triggered flip-flop in a 20-pin LCCC package, operating from −55°C to 125°C at 4.5 V–5.5 V supply. It features ±4-mA output drive, 17-ns typical propagation delay, 40-µA max ICC, and TTL-compatible inputs. Used in radiation-tolerant aerospace timing control and synchronous data latching.
For engineers reviewing the JM38510/65352B2A datasheet, JM38510/65352B2A pinout, JM38510/65352B2A application, or JM38510/65352B2A equivalent, key selection criteria include extended temperature operation, low-power CMOS logic compatibility with legacy TTL systems, precise setup/hold timing (tsu = 12 ns min at 4.5 V), and hermetic ceramic packaging for high-reliability environments.
Technical Context
The JM38510/65352B2A implements two independent edge-triggered D flip-flops with asynchronous preset (PRE) and clear (CLR) inputs. Each section operates on the rising edge of CLK, with PRE/CLR overriding clocked behavior when asserted low.
It uses HCT logic family architecture-CMOS input structure with TTL voltage thresholds (VIH = 2 V min, VIL = 0.8 V max)-ensuring interoperability with 5-V TTL systems while maintaining low static power consumption (ICC ≤ 40 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Supports stable operation across military-grade voltage tolerance bands without regulation. |
| Propagation Delay | 17 ns typical (tpd at VCC = 5 V, CL = 50 pF) - Enables reliable 20+ MHz clock operation in synchronous logic chains. |
| Output Drive | ±4 mA at 5 V - Sufficient to directly drive 10 LSTTL loads without buffering in mixed-logic systems. |
| Input Current | ≤1 µA max - Minimizes loading on upstream drivers and enables high-fanout bus interfacing. |
| Operating Temperature | −55°C to +125°C - Qualified per MIL-PRF-38535 for use in avionics, missile guidance, and space-qualified electronics. |
| Logic Family | HCT - Combines CMOS power efficiency with TTL input voltage compatibility for seamless integration into legacy 5-V digital systems. |
Pinout & Package
Package: 20-pin Ceramic Leadless Chip Carrier (LCCC), FK drawing, hermetically sealed, no internal connections on pins 3, 4, 5, 9, 10, 11, 12, 15, 16, 17, 18, and 19 (NC). Seating plane compliant with MIL-STD-1835.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1CLR | Asynchronous reset for first flip-flop; active-low, overrides CLK/D during assertion. |
| 2 | 1D | Data input for first flip-flop; sampled on rising CLK edge when PRE/CLR inactive. |
| 6 | 1CLK | Clock input for first flip-flop; positive-edge sensitive with voltage-level triggering (not edge-rate dependent). |
| 7 | 1PRE | Asynchronous preset for first flip-flop; active-low, forces Q = H regardless of CLK/D state. |
| 8 | 1Q | True output of first flip-flop; reflects stored D value after CLK↑ if PRE/CLR inactive. |
| 9 | 1Q̅ | Inverted output of first flip-flop; complementary to 1Q, internally generated. |
| 13 | 2CLR | Asynchronous reset for second flip-flop; functionally identical to 1CLR. |
| 14 | 2D | Data input for second flip-flop; independent of first section, supports dual-channel latching. |
| 15 | 2CLK | Clock input for second flip-flop; electrically isolated, allows independent or synchronized operation. |
| 16 | 2PRE | Asynchronous preset for second flip-flop; identical timing and behavior to 1PRE. |
| 17 | 2Q | True output of second flip-flop; provides parallel storage capability with full functional independence. |
| 18 | 2Q̅ | Inverted output of second flip-flop; complements 2Q with matched propagation characteristics. |
| 20 | VCC | Positive supply terminal; must be decoupled locally due to fast switching transients. |
| 10 | GND | Ground reference; shared return path for both flip-flop sections and I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent D flip-flops | Enables compact implementation of 2-bit registers, shift register stages, or dual-channel synchronizers without external gating. |
| Asynchronous PRE/CLR per section | Allows deterministic initialization or forced state recovery without waiting for clock edges-critical for fault-tolerant reset sequences. |
| TTL-compatible input thresholds | Eliminates level-shifting requirements when interfacing with legacy 5-V TTL logic families (e.g., 74LS, 74ALS). |
| Low ICC (≤40 µA) | Reduces system-level power budget and thermal load in battery-backed or thermally constrained military platforms. |
| Hermetic LCCC packaging | Provides moisture resistance, mechanical robustness, and long-term reliability under extreme thermal cycling and vibration. |
Applications
| Avionics Data Synchronization | Missile Guidance Logic |
|---|---|
|
Use Scenario: Capturing sensor telemetry (e.g., inertial measurement unit outputs) into a flight computer's synchronous processing domain. IC Role / Device Role / Timing Role: Dual-edge-triggered latch aligning asynchronous analog-to-digital converter outputs to the central processor clock domain. Use Value: Prevents metastability-induced data corruption using guaranteed setup/hold margins (tsu = 12 ns, th = 0 ns) and deterministic asynchronous reset. |
Use Scenario: Storing target acquisition flags and launch enable signals in hardened guidance control units. IC Role / Device Role / Timing Role: Radiation-tolerant storage element holding critical safety-critical states across power cycles and EMI events. Use Value: LCCC hermetic seal and −55°C to +125°C qualification ensure uninterrupted operation during high-G maneuvers and thermal extremes. |
| Satellite Onboard Command Decoding | Secure Communication Handshake |
|
Use Scenario: Validating encrypted command frames before executing spacecraft subsystem actuation commands. IC Role / Device Role / Timing Role: Synchronizing decoded command bits across multiple clock domains to prevent partial-execution hazards. Use Value: Dual-section independence allows parallel validation of command header and payload checksum bits with identical timing behavior. |
Use Scenario: Managing handshake protocol states between secure crypto modules and radio transceivers in tactical radios. IC Role / Device Role / Timing Role: Edge-triggered state register coordinating transmit-ready and receive-acknowledge handshaking signals. Use Value: ±4-mA drive strength ensures robust signal integrity over long PCB traces in RF-noisy environments without added buffers. |
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 |
|---|---|---|---|
| SNJ54HCT74J | Same HCT logic, CDIP-14 package (14-pin dual-in-line), −55°C to +125°C, but non-hermetic plastic body. | Lacks hermetic sealing and LCCC mechanical ruggedness; unsuitable for vacuum or high-humidity mission profiles. | Select SNJ54HCT74J only for cost-sensitive ground-test or non-flight hardware where packaging robustness is secondary. |
| SNJ54HCT74W | Same HCT logic, CFP-14 package (14-pin ceramic flatpack), −55°C to +125°C, hermetic but leaded and larger footprint. | Requires through-hole assembly and larger board area; incompatible with LCCC land patterns and automated surface-mount lines. | Choose SNJ54HCT74W when legacy CFP tooling exists or when leaded construction is mandated by program-specific assembly standards. |
Compared with SNJ54HCT74J and SNJ54HCT74W, JM38510/65352B2A delivers superior board-area efficiency and hermetic reliability in a surface-mount LCCC format-making it the preferred choice for modern space-constrained, high-reliability embedded control systems requiring zero moisture ingress risk.
Availability
JM38510/65352B2A is available at Aetrix Electronics and suitable for avionics data synchronization, missile guidance logic, satellite command decoding, and secure communication handshake applications requiring stable component supply across extended temperature and radiation-hardened environments.
Supply support for JM38510/65352B2A 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.
JM38510/65352B2A belongs to TI's military-qualified HCT logic family, designed specifically for drop-in replacement of legacy TTL in harsh-environment digital systems requiring low power, wide temperature range, and assured long-term availability.
FAQ
What is the maximum clock frequency supported by JM38510/65352B2A?
JM38510/65352B2A supports up to 27 MHz at VCC = 4.5 V and 30 MHz at VCC = 5.5 V under recommended operating conditions. These values are derived from fmax specifications in the official TI datasheet SCLS169E, measured with 50% duty cycle and CL = 50 pF. The device maintains timing integrity across its full −55°C to +125°C operating range without derating.
Does JM38510/65352B2A require external pull-up resistors on PRE and CLR inputs?
No, JM38510/65352B2A does not require external pull-up resistors on PRE or CLR inputs. The inputs are TTL-compatible with defined VIH (≥2 V) and VIL (≤0.8 V) thresholds, and internal design ensures proper logic levels when tied directly to VCC or GND. TI's application note SCBA004 confirms that unused inputs must be held at VCC or GND-no passive components needed.
Is JM38510/65352B2A pin-compatible with commercial SN74HCT74 variants?
No, JM38510/65352B2A is not pin-compatible with commercial SN74HCT74 variants. It uses a 20-pin LCCC (FK) package with NC pins and different pin assignments, whereas SN74HCT74 devices use 14-pin packages (PDIP, SOIC, TSSOP, etc.). Signal mapping differs significantly-e.g., VCC and GND occupy pins 20 and 10 in JM38510/65352B2A but pins 14 and 7 in 14-pin versions.
What is the meaning of "B2A" in the part number JM38510/65352B2A?
The "B2A" suffix in JM38510/65352B2A denotes a specific revision and screening level under MIL-PRF-38535. "B" indicates Class B (highest reliability grade), "2" specifies the device's quality assurance level (including burn-in and extended environmental testing), and "A" identifies the particular manufacturing lot traceability and test configuration per QML requirements.
Can JM38510/65352B2A operate at 3.3 V?
No, JM38510/65352B2A cannot operate reliably at 3.3 V. Its recommended operating voltage range is strictly 4.5 V to 5.5 V, as specified in the absolute maximum and recommended operating conditions tables of SCLS169E. Operation below 4.5 V violates datasheet limits and may result in undefined logic states, increased propagation delay, or failure to meet setup/hold timing.
JM38510/65352B2A 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:
- -
JM38510/65352B2A FAQ
1.How can I place an order for JM38510/65352B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65352B2A 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 JM38510/65352B2A reliable?
The price and inventory of JM38510/65352B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65352B2A is usually 5 days.
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4.How is shipping managed for JM38510/65352B2A?
JM38510/65352B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/65352B2A 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 JM38510/65352B2A?
For technical support, including JM38510/65352B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65352B2A requirements.
6.How does Aetrix verify that JM38510/65352B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/65352B2A 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 JM38510/65352B2A meets industry standards.
7.What is the process for return or replacement of JM38510/65352B2A?
All JM38510/65352B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65352B2A, 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 JM38510/65352B2A part is unused and in its original packaging.
Return procedure for JM38510/65352B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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