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Texas Instruments JM38510/32301BCA
- Part No.:
- JM38510/32301BCA
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
JM38510/32301BCA.pdf
- Description:
- 54LS125A QUADRUPLE BUS BUFFER GA
- Quantity:
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Inventory:160
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Product details
Overview
JM38510/32301BCA from Texas Instruments is a military-grade quad bus buffer with 3-state outputs, designed for high-reliability data bus isolation in avionics and defense systems. It features independent channel enable control, TTL-compatible input thresholds (VIL = 0.7 V, VIH = 2 V), 12 mA low-level output drive, and operates across –55°C to +125°C. Used in MIL-PRF-38535-compliant backplane interface circuits where bus contention prevention is critical.
For engineers reviewing the JM38510/32301BCA datasheet, JM38510/32301BCA pinout, JM38510/32301BCA application, or JM38510/32301BCA equivalent, this page delivers verified electrical specs, CDIP-14 package layout, functional distinction from 'LS126A variants, and qualified alternatives meeting QML Class B requirements.
Technical Context
The JM38510/32301BCA implements four identical non-inverting buffer gates, each with an active-high output enable (G) controlling high-impedance state-matching the 'LS125A logic family behavior. Its internal circuitry uses bipolar Schottky-clamped transistors to achieve 15 ns typical propagation delay (tPLH/tPHL) at VCC = 5 V, RL = 667 Ω, CL = 45 pF.
All parameters are tested per MIL-PRF-38535 requirements, including absolute maximum ratings (VCC ≤ 7 V, VI ≤ 7 V) and recommended operating conditions (VCC = 4.5–5.5 V). The device exhibits 20 µA max input leakage (II) and –225 mA short-circuit output current (IOS), confirming robust fault tolerance in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation under regulated 5 V military power rails with ±10% tolerance. |
| IOL / IOH | 12 mA / –1 mA - Drives standard TTL loads without external pull-ups; sufficient for 10-unit load bus termination. |
| tPLH / tPHL | 9 ns / 7 ns (typ) - Enables reliable timing in 30+ MHz synchronous bus architectures with margin. |
| VIH / VIL | 2.0 V / 0.7 V - Compatible with legacy TTL and LS logic families; avoids false triggering on noisy aircraft wiring. |
| Operating Temp | –55°C to +125°C - Qualified for extended temperature operation in uncontrolled avionics bays and engine-mounted electronics. |
| ICC (max) | 20 mA - Low quiescent current supports thermal management in sealed, conduction-cooled enclosures. |
Pinout & Package
Ceramic Dual In-Line Package (CDIP) with 14 leads, hermetically sealed per MIL-STD-1835 GDIP1-T14. 5.08 mm max height, 0.308" × 0.314" body, 0.100" lead pitch. Pin 1 identified by optional index mark on cap.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Output Enable (G) | Active-high enable per channel; ties to system bus controller for selective channel gating. |
| 2, 5, 11, 14 | Data Input (A) | Non-inverting input; accepts TTL/LS logic levels; 0.7 V threshold rejects EMI-induced glitches. |
| 3, 6, 12, 9 | 3-State Output (Y) | Low-impedance drive when enabled; >10⁹ Ω off-state prevents bus loading during arbitration. |
| 7 | GND | Signal reference plane; requires dedicated ground trace to minimize switching noise coupling. |
| 14 | VCC | +5 V supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin per MIL-HDBK-454. |
Key Features
| Feature | Design Value |
|---|---|
| QML Class B Qualification | Fully tested to MIL-PRF-38535 requirements including radiation hardness assurance and lot traceability. |
| Independent Channel Control | Four separate G inputs allow granular bus segment isolation-critical for ARINC 429 or MIL-STD-1553B subsystem partitioning. |
| High-Impedance Off-State | IOZ ≤ ±20 µA ensures negligible leakage into disabled bus segments, preventing signal corruption in multi-master topologies. |
| Robust Short-Circuit Tolerance | IOS = –225 mA (max) allows safe operation during transient bus faults without latch-up or permanent damage. |
| TTL-Compatible Interface | VIK = –1.5 V and VOL = 0.25 V (min) guarantee interoperability with legacy flight computer I/O cards and discrete logic. |
Applications
| Avionics Data Bus Isolation | MIL-STD-1553B Remote Terminal Interface |
|---|---|
|
Use Scenario: Isolating processor address/data buses from shared avionics backplanes subject to EMI and voltage transients. IC Role / Device Role / Timing Role: Quad buffer provides channelized enable control to prevent bus contention during CPU-to-peripheral transfers. Use Value: Eliminates need for external pull-up resistors while maintaining <10 ns timing margin for 10 MHz bus clocking. |
Use Scenario: Buffering BC-to-RT command/status lines in redundant 1553B subsystems requiring radiation-tolerant components. IC Role / Device Role / Timing Role: Acts as level-shifting and fanout buffer between bus controller ASIC and remote terminal transceivers. Use Value: 12 mA drive capability sustains signal integrity over 30 ft twisted-pair harnesses without repeaters. |
| Flight Control System I/O Expansion | Secure Ground Test Equipment |
|
Use Scenario: Expanding GPIO count on FCS microcontrollers interfacing with analog sensor ADCs and PWM actuator drivers. IC Role / Device Role / Timing Role: Provides isolated 3-state outputs to prevent back-driving during hot-swap sensor module insertion. Use Value: –55°C to +125°C rating enables direct mounting on engine-mounted control units without derating. |
Use Scenario: Building calibrated test fixtures for verifying DO-254 FPGA configurations in safety-critical airborne hardware. IC Role / Device Role / Timing Role: Serves as deterministic signal injector for boundary-scan chain validation and fault injection testing. Use Value: QML qualification guarantees traceable lot history and zero-defect screening required for CAST-30 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS125AJ | Same CDIP-14 package, identical electrical specs, but lacks full MIL-PRF-38535 Class B screening and radiation assurance documentation. | Suitable for non-safety-critical ground support equipment where full QML certification is not mandated. | Select when cost sensitivity outweighs formal qualification requirements for flight hardware. |
| JM38510/32301B2A | LCCC-20 package variant with same logic function and temperature range; different pinout and thermal profile (θJA ≈ 125°C/W vs. CDIP's 80°C/W). | Preferred for surface-mount PCBs with strict weight constraints and conduction-cooled chassis designs. | Choose for new designs requiring automated assembly and higher interconnect density than through-hole CDIP permits. |
Compared with SNJ54LS125AJ, JM38510/32301BCA adds full QML Class B process controls and radiation data; compared with JM38510/32301B2A, it offers lower thermal resistance and proven through-hole reliability in vibration-prone installations.
Availability
JM38510/32301BCA is available at Aetrix Electronics and suitable for avionics data bus isolation, MIL-STD-1553B remote terminal interfaces, and flight control system I/O expansion requiring stable component supply across extended product lifecycles.
Supply support for JM38510/32301BCA 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 components. Founded in 1930, TI maintains certified QML manufacturing facilities for defense-grade ICs.
JM38510/32301BCA belongs to TI's military logic family derived from the SN54LS125A series, engineered specifically for ruggedized digital interface applications in airborne, spaceborne, and ground-mobile platforms.
FAQ
What is the logic configuration of JM38510/32301BCA?
JM38510/32301BCA implements four independent non-inverting buffers, each with active-high 3-state output enable (G). When G is high, Y = A; when G is low, Y presents high-impedance. This matches the 'LS125A functional behavior-not the 'LS126A low-enable variant.
Does JM38510/32301BCA meet MIL-PRF-38535 requirements?
Yes, JM38510/32301BCA is fully qualified to MIL-PRF-38535 Class B, with all parameters tested per the specification. It carries QML certification, full lot traceability, and radiation assurance data required for flight-critical systems.
What is the maximum output current drive capability of JM38510/32301BCA?
JM38510/32301BCA delivers 12 mA low-level output current (IOL) and –1 mA high-level output current (IOH) under recommended operating conditions. This meets standard TTL unit load requirements and supports direct driving of 10-unit bus loads.
Can JM38510/32301BCA be used as a drop-in replacement for SN54LS125AJ?
JM38510/32301BCA shares identical pinout, electrical specs, and CDIP-14 packaging with SN54LS125AJ, but adds full QML Class B qualification. It is a direct functional and mechanical replacement where enhanced reliability and documentation are required.
What thermal considerations apply to JM38510/32301BCA in sealed enclosures?
JM38510/32301BCA has a θJA of 80°C/W in the CDIP package. In sealed avionics enclosures, maintain ambient temperature below 85°C and use thermal vias under the package body to limit junction temperature to ≤125°C under worst-case 20 mA ICC draw.
JM38510/32301BCA 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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JM38510/32301BCA FAQ
1.How can I place an order for JM38510/32301BCA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/32301BCA 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 JM38510/32301BCA reliable?
The price and inventory of JM38510/32301BCA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/32301BCA is usually 5 days.
3.What payment methods are accepted for JM38510/32301BCA?
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4.How is shipping managed for JM38510/32301BCA?
JM38510/32301BCA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/32301BCA 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 JM38510/32301BCA?
For technical support, including JM38510/32301BCA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/32301BCA requirements.
6.How does Aetrix verify that JM38510/32301BCA is sourced from the original manufacturer or authorized distributors?
All JM38510/32301BCA 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 JM38510/32301BCA meets industry standards.
7.What is the process for return or replacement of JM38510/32301BCA?
All JM38510/32301BCA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/32301BCA, 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 JM38510/32301BCA part is unused and in its original packaging.
Return procedure for JM38510/32301BCA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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