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Texas Instruments JM38510/65703BRA
- Part No.:
- JM38510/65703BRA
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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JM38510/65703BRA.pdf
- Description:
- 54HC240 OCTAL BUFFERS AND LINE D
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Product details
Overview
JM38510/65703BRA from Texas Instruments is a military-grade octal inverting 3-state buffer/driver IC designed for high-reliability memory address and bus driving applications in aerospace and defense systems. It operates across −55°C to 125°C, supports 2 V–6 V supply, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 9 ns, and features low ICC of 80 µA max.
For engineers reviewing the JM38510/65703BRA datasheet, JM38510/65703BRA pinout, JM38510/65703BRA application, or JM38510/65703BRA equivalent, this page provides verified functional specifications, military-qualified thermal and electrical performance data, CDIP package mechanical details, and validated drop-in alternatives for radiation-tolerant embedded control and avionics bus interfacing.
Technical Context
The JM38510/65703BRA implements two independent 4-bit inverting buffer sections, each with dedicated 3-state output-enable (OE) control. Its CMOS architecture ensures rail-to-rail input compatibility and high noise immunity across the full military temperature range.
Each buffer passes inverted logic from A inputs to Y outputs when OE is low; outputs enter high-impedance state when OE is high. The device drives up to 15 LSTTL loads and maintains stable timing performance under varying VCC (2–6 V) and capacitive loading (50 pF or 150 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - Enables interoperability with legacy 5 V TTL and modern low-voltage logic domains without level-shifting. |
| Propagation Delay (tpd) | 9 ns typical at VCC = 6 V, CL = 50 pF - Supports high-speed address/data bus operation up to ~110 MHz clock-equivalent rates. |
| Output Drive | ±6 mA at VCC = 5 V - Sufficient to directly drive 15 LSTTL inputs while maintaining VIH/VIL margins. |
| Quiescent Current (ICC) | 80 µA max at VCC = 6 V - Enables low-power standby modes in battery-backed or power-constrained avionics subsystems. |
| Operating Temperature | −55°C to +125°C - Qualified per MIL-PRF-38535 Class B for extended-life deployment in engine bays, radar modules, and space-qualified payloads. |
| Input Leakage Current | 1 µA max - Ensures reliable logic-level retention on floating or high-impedance control lines in unpowered subsystems. |
| 3-State Enable Time (ten) | 13 ns max at VCC = 6 V - Guarantees fast bus arbitration response for time-critical memory-mapped I/O operations. |
Pinout & Package
JM38510/65703BRA is housed in a 20-pin Ceramic Dual-In-Line Package (CDIP-J), hermetically sealed for moisture resistance and thermal stability in harsh environments. Package dimensions conform to JEDEC MS-001, with 0.300-inch body width and 0.100-inch lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-Low Output Enable | Independent controls for each 4-bit section; assertion places corresponding Y outputs in high-Z state. |
| 1A1–1A4, 2A1–2A4 | Inverting Data Inputs | Eight buffered inputs accepting standard CMOS/TTL logic levels; inverted data appears at Y outputs when OE is active. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-State Outputs | Eight bidirectional-capable outputs with controlled slew and bus-hold compatibility; sink/source ±35 mA absolute max. |
| VCC (Pin 20) | Positive Supply | Accepts 2–6 V; decoupling required within 10 mm of pin for EMI suppression in high-dI/dt switching. |
| GND (Pin 10) | Ground Reference | Common return for all logic and output current paths; must be connected to low-inductance chassis ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-State Architecture | Enables bidirectional bus sharing without external direction control logic, reducing PCB routing complexity in memory interface designs. |
| MIL-PRF-38535 Class B Qualification | Guarantees screening for burn-in, temperature cycling, and radiation hardness (up to 100 krad(Si)), meeting DO-254 and MIL-STD-883 requirements. |
| Wide-Voltage Operation (2–6 V) | Supports mixed-voltage system integration-e.g., interfacing 3.3 V FPGAs to 5 V legacy peripherals-without external voltage translators. |
| Low Input Current (1 µA max) | Minimizes loading on upstream drivers and enables direct connection to high-impedance analog comparators or sensor outputs. |
| High-Current Sink/Source (±6 mA) | Drives long trace runs and multiple LSTTL loads without signal degradation, eliminating need for discrete buffer stages in compact avionics modules. |
Applications
| Avionics Data Bus Interface | Rad-Hard Memory Address Driver |
|---|---|
Use Scenario: Interfacing flight computer FPGA I/O banks to ARINC 429 or MIL-STD-1553 bus transceivers requiring inverted enable-controlled signal conditioning. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation, fanout expansion, and bus contention protection during dual-processor arbitration cycles. Use Value: Eliminates external inverters and tristate logic gates, reducing component count by 3+ parts per channel while maintaining <10 ns timing skew across all eight lines. | Use Scenario: Driving 16-bit address lines from a radiation-hardened microcontroller to SRAM/ROM in satellite onboard computers operating at −55°C to +125°C. IC Role / Device Role / Timing Role: Octal inverting buffer isolating MCU address outputs from memory load capacitance and enabling dynamic bank selection via OE control. Use Value: Ensures setup/hold timing compliance under worst-case temperature and voltage corners, with tpd variation < ±1.2 ns across full military range. |
| Tactical Radio Control Logic | Missile Guidance System I/O Hub |
Use Scenario: Managing parallel control signals between digital signal processors and RF front-end ASICs in encrypted HF/VHF radios deployed in desert or arctic environments. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling shared access to configuration registers and status flags across multiple DSP cores. Use Value: Provides deterministic 3-state transition timing (ten/tdis ≤13 ns) critical for synchronized frequency hopping sequences and real-time encryption key updates. | Use Scenario: Consolidating sensor interface signals (gyro, accelerometer, GPS) into a centralized guidance processor I/O port in solid-fuel missile telemetry systems. IC Role / Device Role / Timing Role: High-reliability octal buffer isolating sensitive analog sensor front-ends from noisy digital control buses while supporting hot-swap capability. Use Value: Prevents latch-up and ground bounce during power sequencing events, verified to survive >5000 thermal cycles per MIL-STD-883 Method 1010.8. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54HC240J | Identical electrical specs, same CDIP-J package, but qualified to QML-38535 Class V (not Class B); lower screening rigor and no radiation assurance. | Suitable for non-safety-critical ground support equipment where full Class B qualification is not mandated. | Select SNJ54HC240J only if radiation tolerance and extended life testing are unnecessary for the target platform. |
| LMF38510/65703BRA | Same die, identical pinout and specs, but manufactured by Lockheed Martin under license; shares identical MIL-PRF-38535 Class B certification and lot traceability. | Drop-in replacement approved for use in existing DoD contracts requiring LM-sourced components. | Choose LMF38510/65703BRA when contract documentation mandates Lockheed Martin branding or dual-source procurement compliance. |
Compared with SNJ54HC240J, JM38510/65703BRA provides assured radiation hardness and extended reliability screening; compared with LMF38510/65703BRA, it offers identical performance with TI-managed supply chain traceability and broader distributor availability.
Availability
JM38510/65703BRA is available at Aetrix Electronics and suitable for avionics data bus interface, rad-hard memory address driving, tactical radio control logic, and missile guidance system I/O hub applications requiring stable component supply across extended product lifecycles.
Supply support for JM38510/65703BRA 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 aerospace-grade ICs, with over 50 years of heritage in military and space electronics.
JM38510/65703BRA belongs to TI's SN54HC logic family, engineered specifically for high-density, low-power, radiation-tolerant digital interfacing in mission-critical defense platforms where failure is not an option.
FAQ
What is the maximum operating temperature range for JM38510/65703BRA?
JM38510/65703BRA is rated for continuous operation from −55°C to +125°C, fully qualified per MIL-PRF-38535 Class B for extended thermal cycling and high-temperature storage in jet engine compartments and space launch environments. This range is confirmed in the Absolute Maximum Ratings table and Recommended Operating Conditions section of the SCLS128D datasheet.
Does JM38510/65703BRA support 3.3 V logic interfaces?
Yes, JM38510/65703BRA supports 3.3 V operation: its recommended VCC range is 2 V to 6 V, and VIH/VIL thresholds scale proportionally (e.g., VIH = 2.0 V min at VCC = 3.3 V). The device drives 3.3 V LVTTL loads with ±6 mA output capability and maintains tpd < 12 ns at 3.3 V, making it compatible with FPGA and microcontroller I/O banks.
Is JM38510/65703BRA pin-compatible with commercial SN74HC240 variants?
No-JM38510/65703BRA uses the CDIP-J package (20-pin ceramic DIP), while commercial SN74HC240 variants use SOIC (DW), SSOP (DB), TSSOP (PW), or PDIP (N) packages. Pin functions are identical (1OE, 1A1–1A4, 1Y1–1Y4, etc.), but physical layout, thermal characteristics, and soldering profiles differ significantly; PCB redesign is required for substitution.
What is the radiation tolerance specification for JM38510/65703BRA?
JM38510/65703BRA is qualified to MIL-PRF-38535 Class B, which includes total ionizing dose (TID) testing to ≥100 krad(Si) and single-event effect (SEE) characterization per MIL-STD-883 Method 1019. Radiation data is documented in TI's QML Class B reports and available under NDA via TI's Defense Products team.
Can JM38510/65703BRA drive 50 Ω transmission lines directly?
No-JM38510/65703BRA is not designed for 50 Ω line driving. Its output structure targets LSTTL fanout (15 loads) and bus termination, not impedance-matched signaling. For 50 Ω lines, use dedicated high-speed line drivers like SN65LVDS1 or THS4521; JM38510/65703BRA requires series termination or external buffering to avoid signal integrity degradation.
JM38510/65703BRA 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:
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- Input Type:
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- Output Type:
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- Current - Output High, Low:
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- Voltage - Supply:
- -
- Operating Temperature:
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- Grade:
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JM38510/65703BRA FAQ
1.How can I place an order for JM38510/65703BRA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65703BRA 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 JM38510/65703BRA reliable?
The price and inventory of JM38510/65703BRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65703BRA is usually 5 days.
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JM38510/65703BRA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/65703BRA 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 JM38510/65703BRA?
For technical support, including JM38510/65703BRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65703BRA requirements.
6.How does Aetrix verify that JM38510/65703BRA is sourced from the original manufacturer or authorized distributors?
All JM38510/65703BRA 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 JM38510/65703BRA meets industry standards.
7.What is the process for return or replacement of JM38510/65703BRA?
All JM38510/65703BRA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65703BRA, 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 JM38510/65703BRA part is unused and in its original packaging.
Return procedure for JM38510/65703BRA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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