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Texas Instruments JM38510/65703B2A
- Part No.:
- JM38510/65703B2A
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
JM38510/65703B2A.pdf
- Description:
- 54HC240 OCTAL BUFFERS AND LINE D
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Inventory:3,210
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Product details
Overview
JM38510/65703B2A from Texas Instruments is a military-grade octal inverting 3-state buffer/driver IC designed for high-reliability memory address and bus driving applications. It operates across 2 V to 6 V, delivers ±6-mA output drive at 5 V, exhibits typical propagation delay of 9 ns, and supports −55°C to +125°C operation in LCCC-20 package.
For engineers reviewing the JM38510/65703B2A datasheet, JM38510/65703B2A pinout, JM38510/65703B2A application, or JM38510/65703B2A equivalent, this page provides verified functional specifications, military-qualified thermal and electrical performance data, 3-state bus interface behavior, and direct alternatives for radiation-tolerant or extended-temperature embedded systems.
Technical Context
The JM38510/65703B2A implements two independent 4-bit inverting buffers, each with dedicated active-low output-enable (1OE, 2OE) control. Its CMOS architecture ensures low static current (≤80 µA ICC max) while maintaining TTL-compatible output drive strength (±6 mA at 5 V).
Each buffer passes inverted logic from A inputs to Y outputs when OE is low; outputs enter high-impedance state when OE is high. Input thresholds are rail-proportional (VIH = 0.7×VCC, VIL = 0.3×VCC), and switching is characterized at CL = 50 pF and CL = 150 pF for robust timing validation in bus-loaded environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - Enables interoperability with 3.3 V and 5 V logic families without level shifters. |
| Propagation Delay (tpd) | 9 ns typical at VCC = 6 V, CL = 50 pF - Supports >30 MHz bus toggle rates in memory address paths. |
| Output Drive Strength | ±6 mA at VCC = 5 V - Sufficient to directly drive 15 LSTTL loads per output, reducing fanout buffering needs. |
| Quiescent Current (ICC) | 80 µA maximum - Minimizes standby power in battery-backed or low-power avionics subsystems. |
| Operating Temperature | −55°C to +125°C - Qualified per MIL-PRF-38535 for use in aerospace, defense, and downhole instrumentation. |
| Input Leakage Current | ±1 µA maximum - Ensures reliable logic thresholds even with high-impedance source interfaces or long PCB traces. |
| 3-State Enable/Disable Time | ten = 13 ns, tdis = 21 ns (VCC = 6 V, CL = 50 pF) - Enables precise bus arbitration timing in multiplexed data/address systems. |
Pinout & Package
LCCC-20 ceramic package (FK drawing), hermetically sealed, leadless, with J-lead geometry and 1.27 mm pitch. Suitable for high-reliability board assembly requiring zero moisture sensitivity (MSL N/A) and resistance to thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit buffer group; drives outputs to high-Z when high. |
| 1A1–1A4, 2A1–2A4 | Inverting input | Logic inputs inverted and routed to corresponding Y outputs when OE is low. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-state output | Active-low inversion of A inputs; high-impedance when OE is high. |
| VCC | Positive supply | Power pin for all internal logic and output drivers; must be decoupled locally. |
| GND | Ground reference | Common return path for supply and signal currents; critical for noise immunity in mixed-signal boards. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-state logic | Enables bidirectional bus sharing without external direction control logic. |
| Wide voltage operation (2–6 V) | Eliminates need for separate voltage translators in hybrid 3.3 V/5 V system backplanes. |
| Low input current (≤1 µA) | Reduces loading on preceding logic stages and enables long trace routing without signal degradation. |
| High-current outputs (±6 mA) | Drives multiple LSTTL inputs directly, minimizing external buffer count in memory subsystems. |
| MIL-PRF-38535 Class B qualification | Guarantees screening, burn-in, and test compliance for spaceflight and tactical platform deployment. |
Applications
| Memory Address Buffering | Avionics Data Bus Interface |
|---|---|
|
Use Scenario: Driving 20-bit address lines from a microcontroller to multiple SRAM/ROM chips in a radiation-hardened flight computer. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating CPU address bus from memory array; enables bank selection via OE control. Use Value: 9 ns tpd ensures setup/hold timing margins at 25 MHz clock rates; ±6 mA drive sustains signal integrity across 10 cm PCB traces. |
Use Scenario: Interfacing a MIL-STD-1553B remote terminal controller to shared system data bus under extreme temperature cycling. IC Role / Device Role / Timing Role: Bidirectional bus driver managing time-multiplexed command/data transfers between RT and bus controller. Use Value: −55°C to +125°C operation maintains timing stability across aircraft altitude profiles; 3-state isolation prevents bus contention during fault recovery. |
| Secure Boot ROM Selection | Tactical Radio Control Logic |
|
Use Scenario: Selecting between primary and backup boot ROMs in a secure communications processor using hardware-based failover. IC Role / Device Role / Timing Role: Inverting address decoder enabling/disabling ROM chip-select lines based on watchdog status signals. Use Value: Low ICC (≤80 µA) minimizes power draw in always-on security monitor circuits; rail-proportional VIH/VIL ensures compatibility with diverse reset ICs. |
Use Scenario: Controlling RF front-end switch matrices and filter banks in a jam-resistant software-defined radio operating in desert environments. IC Role / Device Role / Timing Role: Level-shifting and bus-isolating control signals between FPGA configuration logic and analog RF ICs. Use Value: LCCC-20 package withstands 1000+ thermal cycles without solder joint fatigue; 2 V–6 V range accommodates both 3.3 V FPGA I/O and 5 V analog bias rails. |
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 |
|---|---|---|---|
| SNJ54HC240FK | Identical electrical specs and LCCC-20 package; differs only in device marking and lot trace format per QML requirements. | No functional difference; used interchangeably in new designs where TI's standard military part number is preferred over JAN-style nomenclature. | Select SNJ54HC240FK if sourcing through standard TI military channels; identical form, fit, and function to JM38510/65703B2A. |
| 54HC240 (Renesas) | Same logic function and DC specs, but qualified to MIL-STD-883 Class B with different screening flow and test limits (e.g., lower temp range margin on tpd). | Suitable for non-flight-critical ground support equipment where full QML-38535 certification is not mandated. | Choose Renesas 54HC240 only for cost-sensitive programs accepting alternative military qualification; verify tpd and ICC limits against your design margin. |
Compared with JM38510/65703B2A, SNJ54HC240FK offers identical performance and qualification with simplified procurement logistics, while Renesas 54HC240 provides a lower-cost alternative for applications where QML-38535 Class B documentation and lot traceability are not required.
Availability
JM38510/65703B2A is available at Aetrix Electronics and suitable for aerospace avionics, defense electronics, and industrial control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for JM38510/65703B2A 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 logic solutions for industrial, automotive, and defense markets.
JM38510/65703B2A belongs to TI's military HC logic family, engineered for mission-critical systems demanding guaranteed performance across extreme environmental stress and long-term obsolescence resilience.
FAQ
What is the absolute maximum supply voltage rating for JM38510/65703B2A?
The absolute maximum supply voltage for JM38510/65703B2A is −0.5 V to 7 V. Operation beyond 6 V violates recommended conditions and risks permanent damage. TI specifies 2 V to 6 V as the functional operating range, with electrical characteristics fully guaranteed only within that band. Exceeding 7 V may cause latch-up or oxide breakdown in the JM38510/65703B2A CMOS structure.
Does JM38510/65703B2A support non-inverting operation?
No, JM38510/65703B2A is strictly an inverting octal buffer. Its logic function is fixed: Y = NOT(A) when OE is low. There is no internal configuration or external pin to disable inversion. For non-inverting functionality, engineers must select JM38510/65704B2A (octal non-inverting 3-state buffer) or implement external inversion using discrete gates or FPGA logic.
Is JM38510/65703B2A pin-compatible with commercial SN74HC240 variants?
Yes, JM38510/65703B2A in LCCC-20 (FK) package shares identical pinout and logic function with SN74HC240 in FK package (e.g., SNJ54HC240FK), including pin positions for VCC, GND, OE, A, and Y terminals. However, PCB layout must account for LCCC-specific soldering requirements, thermal relief, and absence of leads-unlike gull-wing SOIC or PDIP packages used for commercial SN74HC240 variants.
What is the maximum capacitive load JM38510/65703B2A can drive while maintaining specified tpd?
JM38510/65703B2A timing parameters are characterized at CL = 50 pF and CL = 150 pF. At 6 V supply, tpd increases from 9 ns (CL = 50 pF) to 13 ns (CL = 150 pF). TI does not specify maximum CL, but practical limit is ~200 pF before tpd exceeds 15 ns and edge rate degrades significantly. For heavier loads, add series termination or buffer staging rather than relying solely on JM38510/65703B2A drive capability.
How does the 3-state enable timing of JM38510/65703B2A affect bus arbitration in synchronous systems?
JM38510/65703B2A enables bus arbitration via controlled output transition: ten (enable time) is 13 ns and tdis (disable time) is 21 ns at VCC = 6 V, CL = 50 pF. This asymmetry means outputs go high-Z faster than they become active-critical for avoiding bus contention during handoff between masters. Designers must align OE edges with clock domain boundaries and allow ≥25 ns guard band between successive OE assertions in synchronous bus protocols using JM38510/65703B2A.
JM38510/65703B2A 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:
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- Mounting Type:
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- Supplier Device Package:
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JM38510/65703B2A FAQ
1.How can I place an order for JM38510/65703B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65703B2A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of JM38510/65703B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65703B2A is usually 5 days.
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Once your JM38510/65703B2A 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 JM38510/65703B2A?
For technical support, including JM38510/65703B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65703B2A requirements.
6.How does Aetrix verify that JM38510/65703B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/65703B2A 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 JM38510/65703B2A meets industry standards.
7.What is the process for return or replacement of JM38510/65703B2A?
All JM38510/65703B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65703B2A, 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 JM38510/65703B2A part is unused and in its original packaging.
Return procedure for JM38510/65703B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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