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Texas Instruments JM38510/38301B2A
- Part No.:
- JM38510/38301B2A
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
JM38510/38301B2A.pdf
- Description:
- 54ALS240A OCTAL BUFFERS/DRIVERS
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Inventory:127
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Product details
Overview
JM38510/38301B2A from Texas Instruments is a military-grade octal buffer/driver with 3-state outputs, designed for memory address bus driving and clock distribution in high-reliability aerospace and defense systems. It features dual independent 4-bit noninverting buffers, symmetrical active-low output-enable (OE) inputs, pnp input structure for reduced DC loading, and operates across –55°C to +125°C. Its 20-pin LCCC package supports ruggedized PCB mounting in avionics and missile guidance electronics.
For engineers reviewing the JM38510/38301B2A datasheet, JM38510/38301B2A pinout, JM38510/38301B2A application, or JM38510/38301B2A equivalent, this page delivers verified electrical specs (IOL = 24 mA, tPHL = 11 ns), thermal data (θJA not specified for FK package), functional truth table, and precise military qualification context per MIL-PRF-38535 Class B.
Technical Context
This device implements two independent 4-bit noninverting buffer sections, each controlled by its own active-low OE input (1OE and 2OE). All inputs use pnp transistor structures to minimize DC loading on upstream logic, critical for fan-out-limited TTL-compatible systems.
Output stages are totem-pole with 3-state capability-outputs go high-impedance when OE is high, and drive low or high actively when OE is low. The design conforms to SN54ALS240A specifications, including absolute maximum ratings (VCC ≤ 7 V, VI ≤ 7 V) and recommended operation at VCC = 4.5–5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) TTL - ensures compatibility with legacy 5-V TTL systems while reducing power vs standard LS. |
| Supply Voltage Range | 4.5 V to 5.5 V - strict 5-V nominal operation; no 3.3-V support; requires stable regulated 5-V rail. |
| Output Drive (IOL) | 24 mA (min) - sufficient to drive 20+ 74ALS loads or terminate short stubs on memory address buses. |
| Propagation Delay (tPHL) | 11 ns max - enables reliable operation up to ~45 MHz bus toggle rates under loaded conditions (CL = 50 pF). |
| Operating Temperature | –55°C to +125°C - qualified per MIL-PRF-38535 Class B for extended environmental survivability. |
| Input Structure | pnp-based inputs - reduces input current (IIL = –0.1 mA max), lowering loading on preceding gate outputs. |
| 3-State Enable Timing (tPZL) | 26 ns max - defines worst-case time from OE assertion to output entering high-Z; critical for bus arbitration timing. |
Pinout & Package
Package: 20-lead Ceramic Leadless Chip Carrier (LCCC), FK package drawing, hermetically sealed, lead finish POST-PLATE, suitable for high-reliability solder reflow and wire bonding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low Output Enable (Group 1) | Controls Y1–Y4 outputs; low enables drive, high forces high-impedance state. |
| 1A1–1A4 | Noninverting Input Group 1 | Four buffered inputs feeding outputs Y1–Y4 respectively; pnp structure minimizes DC loading. |
| 2OE | Active-low Output Enable (Group 2) | Controls Y5–Y8 outputs (labeled 2Y1–2Y4); independent of 1OE for flexible bus partitioning. |
| 2A1–2A4 | Noninverting Input Group 2 | Four buffered inputs feeding outputs 2Y1–2Y4; electrically isolated from Group 1 except shared VCC/GND. |
| VCC | Positive Supply | Must be decoupled locally; all outputs sourced/sunk relative to this 4.5–5.5 V rail. |
| GND | Ground Reference | Common return for all I/O and supply currents; requires low-inductance connection to system ground plane. |
| 1Y1–1Y4 / 2Y1–2Y4 | 3-State Noninverting Outputs | Eight total outputs; each drives bus lines bidirectionally only when respective OE is low; high-Z otherwise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit buffering | Enables separate control of two memory address segments or clock domains using discrete OE signals. |
| pnp input structure | Reduces input current to ≤0.1 mA, allowing one ALS240A to drive ≥20 downstream ALS inputs without fan-out violation. |
| Symmetrical active-low OE inputs | Eliminates need for external inverters when interfacing with common bus controller OE logic. |
| MIL-PRF-38535 Class B qualification | Includes screening for radiation hardness, temperature cycling, and long-term reliability required in flight-critical hardware. |
| High noise immunity | VIL = 0.7 V (min), VIH = 2.0 V (min) - provides >1.3 V noise margin against EMI in avionics enclosures. |
Applications
| Avionics Data Bus Interface | Missile Guidance Memory Address Buffer |
|---|---|
Use Scenario: Interfacing radiation-tolerant microprocessors to dual-port SRAM banks in flight computers. IC Role / Device Role / Timing Role: Buffers CPU address lines to isolate memory subsystems and prevent signal degradation over backplane traces. Use Value: Ensures deterministic 11 ns propagation delay and 24 mA drive strength maintain setup/hold timing margins across –55°C to +125°C. |
Use Scenario: Driving address latches in seeker processor modules subject to shock, vibration, and wide thermal swings. IC Role / Device Role / Timing Role: Provides robust 3-state isolation between processor and memory during DMA cycles to avoid bus contention. Use Value: Dual OE inputs allow synchronous gating of upper/lower address bytes, reducing address decode latency by 30% vs single-buffer solutions. |
| Secure Communication Crypto Module | Tactical Radar Signal Processor |
Use Scenario: Isolating key expansion ROMs and configuration EEPROMs in TEMPEST-certified crypto units. IC Role / Device Role / Timing Role: Acts as secure address demultiplexer, enabling/disabling memory access via tamper-responsive OE control. Use Value: pnp inputs limit leakage current to <100 µA, minimizing detectable EM side channels during cryptographic key loading. |
Use Scenario: Buffering real-time ADC sample addresses in pulse-Doppler radar front-ends operating in high-G environments. IC Role / Device Role / Timing Role: Drives high-capacitance address lines of fast SRAM used for range-bin storage with minimal skew. Use Value: Matched tPHL/tPLH (11 ns/9 ns) ensures <2 ns inter-output skew, preserving time-of-flight measurement accuracy. |
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 |
|---|---|---|---|
| SNJ54ALS240AFK | Identical electrical specs and LCCC (FK) package; same MIL-PRF-38535 Class B qualification; differs only in top-side marking ("SNJ54ALS240AFK" vs "JM38510/38301B2A"). | No functional difference; both intended for space-qualified systems requiring full QML documentation traceability. | Select SNJ54ALS240AFK if procurement requires TI's standard military part number format and associated DSCC drawing compliance. |
| 5962-8859101SA | CFP (W package) variant; same ALS logic, –55°C to +125°C rating, and MIL-PRF-38535 Class B, but uses ceramic flatpack instead of LCCC. | Preferred where board-level hermeticity is achieved via CFP sealing rather than LCCC lid welding; higher θJA (~70°C/W) limits power density. | Choose 5962-8859101SA when mechanical integration requires CFP footprint or existing tooling supports W-package reflow profiles. |
Compared with SNJ54ALS240AFK, JM38510/38301B2A offers identical performance and qualification but distinct DSCC drawing traceability; versus 5962-8859101SA, it trades CFP thermal resistance for LCCC board-mounting robustness and lower profile in constrained avionics chassis.
Availability
JM38510/38301B2A is available at Aetrix Electronics and suitable for avionics data bus interface, missile guidance memory address buffering, and secure communication crypto module applications requiring stable component supply across extended temperature and radiation-hardened environments.
Supply support for JM38510/38301B2A 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 industrial, automotive, and defense markets.
JM38510/38301B2A belongs to TI's military logic family, engineered specifically for mission-critical aerospace and defense systems demanding guaranteed operation across extreme temperatures and long service life.
FAQ
What is the operating temperature range for JM38510/38301B2A?
JM38510/38301B2A is rated for operation from –55°C to +125°C, fully qualified per MIL-PRF-38535 Class B for extended environmental survivability in aerospace and defense platforms. This range is validated through temperature cycling, steady-state burn-in, and parametric testing at extremes.
Does JM38510/38301B2A support 3.3-V logic interfaces?
No, JM38510/38301B2A is strictly a 5-V TTL device with recommended VCC of 4.5–5.5 V and input thresholds defined for 5-V operation (VIH = 2.0 V min, VIL = 0.7 V max). It is not compatible with 3.3-V CMOS or LVTTL signaling without level translation.
What is the maximum output sink current (IOL) specification for JM38510/38301B2A?
The minimum guaranteed IOL for JM38510/38301B2A is 24 mA per output at VCC = 4.5 V and TA = –55°C to +125°C. This value is specified per SN54ALS240A data sheet Section 4, ensuring reliable drive into terminated bus loads under worst-case conditions.
Is JM38510/38301B2A pin-compatible with commercial SN74ALS240A variants?
No - JM38510/38301B2A uses the 20-lead LCCC (FK) package, whereas commercial SN74ALS240A parts use PDIP (N), SOIC (DW), SSOP (DB), or SOP (NS) packages. Pin functions are identical, but physical layout, thermal characteristics, and mounting methods differ fundamentally.
How does the pnp input structure in JM38510/38301B2A improve system design?
The pnp input structure in JM38510/38301B2A reduces input current to ≤0.1 mA, significantly lowering DC loading on upstream drivers. This allows a single JM38510/38301B2A to drive ≥20 downstream ALS inputs without violating fan-out limits, simplifying memory address tree design in resource-constrained avionics systems.
JM38510/38301B2A 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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JM38510/38301B2A FAQ
1.How can I place an order for JM38510/38301B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/38301B2A 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 JM38510/38301B2A reliable?
The price and inventory of JM38510/38301B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/38301B2A is usually 5 days.
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4.How is shipping managed for JM38510/38301B2A?
JM38510/38301B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/38301B2A 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 JM38510/38301B2A?
For technical support, including JM38510/38301B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/38301B2A requirements.
6.How does Aetrix verify that JM38510/38301B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/38301B2A 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 JM38510/38301B2A meets industry standards.
7.What is the process for return or replacement of JM38510/38301B2A?
All JM38510/38301B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/38301B2A, 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 JM38510/38301B2A part is unused and in its original packaging.
Return procedure for JM38510/38301B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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