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Texas Instruments JM38510/65755B2A
- Part No.:
- JM38510/65755B2A
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
JM38510/65755B2A.pdf
- Description:
- 54HCT244 OCTAL BUFFERS AND LINE
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Inventory:1,465
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Product details
Overview
JM38510/65755B2A from Texas Instruments is a military-grade octal buffer and line driver with 3-state outputs, designed for high-reliability bus interface and memory address driving in harsh-environment systems. It operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 13 ns (CL = 50 pF), supports –55°C to +125°C operation, and drives up to 15 LSTTL loads - enabling robust signal buffering in avionics data buses.
For engineers reviewing the JM38510/65755B2A datasheet, JM38510/65755B2A pinout, JM38510/65755B2A application, or JM38510/65755B2A equivalent, key selection criteria include its MIL-PRF-38535 qualification, LCCC-20 hermetic package, dual 4-bit channel architecture with independent 1OE/2OE controls, and guaranteed performance across extended temperature and radiation-tolerant operating conditions.
Technical Context
The JM38510/65755B2A implements two independent 4-bit noninverting buffer sections, each with dedicated 3-state output-enable inputs (1OE and 2OE). When OE is low, A-inputs pass directly to Y-outputs; when high, outputs enter high-impedance state - enabling bidirectional bus control without contention.
It uses HCT (High-Speed CMOS TTL-compatible) logic, ensuring TTL-voltage-level input compatibility (VIH = 2 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) while maintaining CMOS low-power characteristics (ICC ≤ 80 µA typical). All parameters are 100% tested per MIL-PRF-38535 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with regulated 5 V military power rails and tolerance to supply droop. |
| Operating Temperature | –55°C to +125°C - qualified for deployment in airborne, space, and ground vehicle mission-critical electronics. |
| Output Drive | ±6 mA at 5 V - sufficient to drive 15 LSTTL loads, supporting legacy TTL bus loading without level-shifting. |
| Propagation Delay | 13 ns typical (VCC = 5.5 V, CL = 50 pF) - enables reliable timing in sub-40 MHz synchronous bus interfaces. |
| Input Current | ±1 µA max - minimizes loading on upstream logic and reduces static power in high-density systems. |
| 3-State Leakage | ±0.5 µA max (IOZ) - prevents unintended bus pull-up/down during high-impedance mode in multipoint configurations. |
| ESD Rating | HBM ±1500 V - meets MIL-STD-883 Class B ESD robustness for handling in controlled environments. |
Pinout & Package
LCCC (Leadless Chip Carrier) package, 20-terminal ceramic hermetic housing (8.89 mm × 8.89 mm), designed for high-reliability mounting via solder reflow or epoxy bonding. Pin 1 identified by notch or dot; no leads - terminals are metallized pads on underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enable inputs controlling first and second 4-bit buffer groups independently. |
| 2–4, 6–8, 11–13, 15–17 | 1A1–1A4, 2A1–2A4 | Noninverting digital inputs for respective buffer channels; TTL-compatible voltage thresholds. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 2Y4, 2Y3, 2Y2, 2Y1, 1Y4, 1Y3, 1Y2, 1Y1 | Buffered noninverting outputs; tri-state capable with high-impedance state when OE = high. |
| 10 | GND | Signal and power reference plane; must be low-inductance connection to minimize switching noise. |
| 20 | VCC | Positive supply terminal; requires local 0.1 µF ceramic bypass capacitor per device per MIL-HDBK-454. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-38535 Qualified | 100% tested electrical parameters and screening per military reliability standards, including burn-in and temperature cycling. |
| Dual Independent OE Control | Enables selective activation of either 4-bit group - critical for time-multiplexed address/data bus partitioning in flight computers. |
| TTL-Compatible Inputs | Accepts standard TTL logic levels (0.8 V/2.0 V thresholds) while consuming CMOS-level quiescent current - simplifies mixed-logic system integration. |
| Hermetic LCCC Packaging | Provides moisture resistance, thermal stability, and mechanical ruggedness required for aerospace and defense platforms. |
| Low ICC Consumption | 80 µA maximum supply current - reduces thermal load and extends battery life in portable tactical equipment. |
Applications
| Avionics Data Bus Interface | Rad-Hard Flight Computer I/O |
|---|---|
|
Use Scenario: Buffering address lines between microprocessor and radiation-tolerant SRAM in UAV flight control unit. IC Role / Device Role / Timing Role: Octal noninverting buffer with 3-state outputs isolates CPU address bus during DMA cycles and prevents contention. Use Value: Guaranteed –55°C to +125°C operation and MIL-PRF-38535 screening ensure deterministic timing and latch-up immunity under thermal shock and ionizing radiation. |
Use Scenario: Driving LED status indicators and discrete relay control signals in satellite payload controller. IC Role / Device Role / Timing Role: High-current line driver delivering ±6 mA per output to sink/source indicator LEDs and optocoupler inputs. Use Value: TTL-compatible inputs accept direct connection to FPGA I/O banks; low ICC minimizes heat generation in sealed enclosures. |
| Secure Communications Backplane | Tactical Vehicle Control System |
|
Use Scenario: Level-shifting and bus isolation between encrypted modem baseband processor and RF transceiver ASIC. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling shared memory access while preventing signal reflection via controlled impedance matching. Use Value: 13 ns typical tpd ensures setup/hold compliance for 25 MHz parallel control interfaces; hermetic LCCC prevents corrosion in humid field environments. |
Use Scenario: Interfacing engine control unit (ECU) microcontroller with CAN transceiver and analog sensor conditioning circuitry. IC Role / Device Role / Timing Role: Signal conditioner and bus driver for diagnostic port signals and fault-reporting lines. Use Value: Dual OE pins allow synchronized enable/disable of diagnostic and safety-monitoring signal paths - meeting ISO 26262 ASIL-B functional safety constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN54HCT244J | Same HCT logic family and pinout, but CDIP-20 plastic-sealed package; not MIL-PRF-38535 qualified; rated –55°C to +125°C but with reduced screening. | Suitable for lab prototypes or non-flight hardware where hermeticity and full military screening are unnecessary. | Select SN54HCT244J only for cost-sensitive development units - not for production flight hardware requiring traceable lot data and radiation assurance. |
| SN74HCT244PW | TSSOP-20 commercial-grade package; rated –40°C to +85°C; RoHS-compliant; lacks MIL-PRF-38535 testing and extended temperature validation. | Applicable in industrial control panels or test equipment where environmental stress is moderate and qualification documentation is not mandated. | Choose SN74HCT244PW for volume production in benign environments - avoid in any system requiring DO-254, MIL-STD-810, or radiation tolerance. |
Compared with SN54HCT244J and SN74HCT244PW, JM38510/65755B2A provides verified hermetic sealing, full MIL-PRF-38535 screening, and documented performance across –55°C to +125°C - making it the sole option for deployed avionics, missile guidance, and space-qualified subsystems.
Availability
JM38510/65755B2A is available at Aetrix Electronics and suitable for avionics data bus interface, rad-hard flight computer I/O, secure communications backplane, and tactical vehicle control system applications requiring stable component supply and long-term obsolescence management.
Supply support for JM38510/65755B2A 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 components for aerospace, defense, and industrial markets.
JM38510/65755B2A belongs to TI's military logic portfolio, engineered specifically to meet MIL-PRF-38535 requirements for use in mission-critical systems where failure is not an option.
FAQ
What is the operating temperature range specified for JM38510/65755B2A?
JM38510/65755B2A is fully specified and tested over –55°C to +125°C per MIL-PRF-38535 requirements. This range is validated through temperature cycling, steady-state bias, and parametric testing - unlike commercial variants such as SN74HCT244PW, which is only rated to +85°C. The extended range ensures reliability in jet engine bays, satellite payloads, and desert-deployed electronics.
Is JM38510/65755B2A pin-compatible with SN74HCT244 or SN54HCT244?
Yes, JM38510/65755B2A shares identical pin configuration and logic function with SN54HCT244 and SN74HCT244, including dual 4-bit buffers with independent 1OE/2OE controls and matching Y/A terminal assignments. However, its LCCC-20 package differs physically from SOIC, TSSOP, or PDIP variants - requiring PCB redesign despite functional equivalence.
Does JM38510/65755B2A require external pull-up resistors on OE pins?
Yes - to guarantee high-impedance state during power-up or brownout, both 1OE and 2OE inputs must be tied to VCC via pull-up resistors. TI recommends minimum values based on driver sink capability; for JM38510/65755B2A, 10 kΩ is typical. Floating OE pins risk undefined output states and potential bus contention in safety-critical systems.
What is the maximum capacitive load JM38510/65755B2A can drive while maintaining specified timing?
JM38510/65755B2A is characterized for CL = 50 pF and CL = 150 pF loads. At 5.5 V VCC, typical propagation delay increases from 13 ns (50 pF) to 40 ns (150 pF). Driving >150 pF risks violating setup/hold margins in high-speed interfaces; for heavier loads, TI recommends adding series termination or using lower-capacitance routing practices.
How does JM38510/65755B2A differ from the enhanced product variant SN74HCT244-EP?
JM38510/65755B2A is a MIL-PRF-38535 qualified device with full military screening (including burn-in and radiation lot acceptance tests), whereas SN74HCT244-EP is an enhanced product variant qualified to ASTM E2203 and screened for space applications but not certified to MIL-PRF-38535. JM38510/65755B2A offers traceable lot data, extended temperature validation, and DoD-assigned part numbering essential for defense contracts.
JM38510/65755B2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
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JM38510/65755B2A FAQ
1.How can I place an order for JM38510/65755B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65755B2A 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 JM38510/65755B2A reliable?
The price and inventory of JM38510/65755B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65755B2A is usually 5 days.
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JM38510/65755B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/65755B2A 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 JM38510/65755B2A?
For technical support, including JM38510/65755B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65755B2A requirements.
6.How does Aetrix verify that JM38510/65755B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/65755B2A 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 JM38510/65755B2A meets industry standards.
7.What is the process for return or replacement of JM38510/65755B2A?
All JM38510/65755B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65755B2A, 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 JM38510/65755B2A part is unused and in its original packaging.
Return procedure for JM38510/65755B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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