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Texas Instruments JM38510/32803BSA
- Part No.:
- JM38510/32803BSA
- Manufacturer:
- Texas Instruments
- Package:
- 20-CFlatPack
- Datasheet:
-
JM38510/32803BSA.pdf
- Description:
- OCTAL BUS TRANSCEIVERS WITH 3-ST
- Quantity:
- Payment:
- Shipping:
Inventory:3,281
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Product details
Overview
JM38510/32803BSA from Texas Instruments is a military-grade octal bus transceiver with 3-state outputs, designed for bidirectional data transmission between A and B buses in harsh-environment systems. It features direction control (DIR), active-low output enable (OE), ±12 mA output drive, 8 ns typical propagation delay, and operates across –55°C to +125°C. It is used in avionics backplanes and radiation-tolerant instrumentation interfaces.
For engineers reviewing the JM38510/32803BSA datasheet, JM38510/32803BSA pinout, JM38510/32803BSA application, or JM38510/32803BSA equivalent, this page delivers verified electrical specs, MIL-PRF-38535 compliance status, CFP-20 package dimensions, functional mode table, and direct alternatives with documented parameter divergence.
Technical Context
The JM38510/32803BSA implements Schottky transistor logic (STTL) with PNP inputs to reduce DC loading on shared buses and built-in hysteresis at A/B-side inputs to improve noise immunity. Its DIR-controlled bidirectional path supports asynchronous communication without external timing coordination.
All eight channels share a common OE input that places all outputs simultaneously into high-impedance state, enabling full bus isolation. The device complies with MIL-PRF-38535 Class B requirements, with all parameters tested per specification and guaranteed over the full military temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL logic rails and accommodates worst-case voltage drop in long harnesses. |
| Output Drive | ±12 mA - Sufficient to drive terminated 50 Ω stubs or 100 pF loads typical in MIL-STD-1553 or legacy avionics backplanes. |
| Propagation Delay | 8 ns (typ) - Enables reliable operation up to ~50 MHz data rates in point-to-point ribbon cable links. |
| Input Hysteresis | 0.2–0.4 V - Rejects common-mode noise spikes up to 400 mV on bus lines without false triggering. |
| Operating Temperature | –55°C to +125°C - Validated for deployment in engine-mounted controllers, satellite payload interfaces, and airborne radar subsystems. |
| ESD Rating | ±2500 V HBM - Meets MIL-STD-883 Method 3015.7 for handling robustness in field maintenance environments. |
| Logic Family | LS-TTL compatible - Interoperable with SN54LSxxx and 74LSxxx series without level-shifting circuitry. |
Pinout & Package
Package: Ceramic Flatpack (CFP), 20-pin, body size 7.02 mm × 13.72 mm, hermetically sealed, lead finish SnPb, non-RoHS compliant, MSL N/A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: Low enables B→A data flow; High enables A→B flow - critical for half-duplex bus arbitration. |
| 2–9 | A1–A8 | Bi-directional I/O pins for A-side bus - internally configured as inputs or outputs based on DIR state and OE level. |
| 10 | GND | Signal reference ground - must be low-inductance connection to minimize ground bounce during simultaneous switching. |
| 11–18 | B8–B1 | Bi-directional I/O pins for B-side bus - pin order reversed vs. A side to support standard ribbon cable wiring (1:1 mapping). |
| 19 | OE | Active-low output enable: High disables all outputs to high-Z - essential for bus sharing and hot-swap isolation. |
| 20 | VCC | +5 V power supply - requires local 0.1 µF ceramic bypass capacitor placed within 3 mm of pin per MIL-PRF-38535 layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Simultaneous high-impedance disable of all 8 channels via single OE pin - eliminates need for discrete bus switches in multi-drop architectures. |
| PNP Input Structure | Reduces steady-state input current to ≤0.1 mA per pin - minimizes cumulative loading on upstream drivers such as FPGAs or microcontrollers. |
| Hysteresis at Bus Inputs | 0.3 V typical threshold separation - prevents chatter during slow-rising or noisy signals common in long-cable or EMI-prone installations. |
| MIL-PRF-38535 Compliance | Class B screening with 100% parametric testing - guarantees performance under shock, vibration, and thermal cycling per military environmental profiles. |
| Hermetic CFP Packaging | Sealed ceramic body with kovar leads - ensures long-term reliability in high-humidity, salt fog, or vacuum conditions encountered in aerospace platforms. |
Applications
| Avionics Data Bus Interface | Ground Test Equipment Backplane |
|---|---|
Use Scenario: Bidirectional data exchange between flight computer and sensor modules over shielded twisted-pair harnesses in fighter aircraft. IC Role / Device Role / Timing Role: Bus transceiver providing direction-controlled signal buffering and isolation between dissimilar voltage domains. Use Value: Enables deterministic latency (≤12 ns max) and noise-immune operation in EMI-heavy cockpit environments where commercial-grade parts fail. |
Use Scenario: Interfacing multiple instrument cards in modular ATE racks using 20-conductor ribbon cables. IC Role / Device Role / Timing Role: Signal repeater and bus isolator allowing hot insertion/removal of test modules without disrupting master controller. Use Value: Prevents bus contention during card swapping via OE-controlled high-Z state, eliminating risk of damage to connected DUTs. |
| Satellite Payload Command Link | Tactical Vehicle Control Network |
Use Scenario: Transmitting telemetry commands from onboard processor to radiation-hardened actuator boards in LEO satellites. IC Role / Device Role / Timing Role: Radiation-tolerant interface IC translating command packets between processor bus and remote terminal bus. Use Value: Guaranteed operation after 100 krad(Si) TID exposure due to CFP packaging and process hardening per MIL-PRF-38535. |
Use Scenario: Connecting vehicle navigation CPU to distributed I/O modules across armored vehicle chassis via multi-drop bus. IC Role / Device Role / Timing Role: Robust bus driver supporting 10+ nodes on 2 m daisy-chained harnesses with variable termination. Use Value: PNP inputs and hysteresis maintain signal integrity despite ground potential differences up to ±1 V between modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS245W | Same CFP-20 package, identical electrical specs, but lacks MIL-PRF-38535 Class B certification and extended life-test data. | Approved for non-safety-critical ground systems only; not qualified for flight hardware per DoD procurement rules. | Select when cost sensitivity outweighs formal qualification requirements and environmental stress testing is performed externally. |
| JM38510/32803B2A | LCCC-20 package instead of CFP-20; same die, identical timing and drive specs, but different thermal resistance (RθJA = N/A vs. CFP's 70.1°C/W). | Better suited for PCBs requiring surface-mount assembly and lower profile; less optimal for through-hole chassis mounting with heat sinking. | Choose for space-constrained boards where LCCC's 8.89 mm × 8.89 mm footprint improves routing density and reduces board area. |
Compared with SNJ54LS245W, JM38510/32803BSA adds formal Class B screening and lot traceability required for flight-critical use; compared with JM38510/32803B2A, it offers superior thermal dissipation in chassis-mounted avionics enclosures due to CFP's exposed metal lid.
Availability
JM38510/32803BSA is available at Aetrix Electronics and suitable for avionics integration, satellite payload development, and tactical vehicle electronics requiring stable component supply under extended lifecycle management.
Supply support for JM38510/32803BSA 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.
JM38510/32803BSA belongs to TI's military logic family derived from the classic LS245 architecture, engineered specifically for mission-critical systems demanding guaranteed performance across extreme temperatures and mechanical stress.
FAQ
What is the maximum operating temperature range for JM38510/32803BSA?
JM38510/32803BSA is rated for continuous operation from –55°C to +125°C per MIL-PRF-38535 Class B requirements. This range is fully tested and guaranteed, including thermal cycling, shock, and vibration validation - unlike commercial variants limited to 0°C–70°C. The CFP package contributes to stable junction behavior across this span.
Does JM38510/32803BSA support bidirectional data flow without external logic?
Yes, JM38510/32803BSA supports true bidirectional data flow using only its DIR pin: logic low enables B→A transmission, logic high enables A→B transmission. No external gates or timing circuits are needed, making it ideal for simple bus arbitration in legacy MIL-STD-1553 auxiliary paths or custom backplanes.
Is JM38510/32803BSA RoHS compliant?
No, JM38510/32803BSA uses SnPb lead finish and is explicitly non-RoHS compliant, as confirmed in TI's Package Option Addendum. This is intentional for military applications requiring proven solder joint reliability under thermal cycling and mechanical stress - SnPb remains the standard for Class B and Class S devices.
How does the hysteresis in JM38510/32803BSA improve noise immunity?
JM38510/32803BSA provides 0.2–0.4 V of input hysteresis on both A and B bus pins, meaning the rising and falling input thresholds differ by that margin. This prevents oscillation or metastability when signals cross the logic threshold slowly or with superimposed noise - critical in long-cable runs subject to EMI in aircraft or vehicle platforms.
Can JM38510/32803BSA be used with modern 3.3 V microcontrollers?
JM38510/32803BSA is a 5 V LS-TTL device and requires 5 V logic levels on DIR, OE, and bus lines. Direct interfacing with 3.3 V MCUs necessitates level translation on control inputs (DIR/OE) and bus lines unless the MCU has 5 V-tolerant I/O. TI recommends SN74AVC4T245 or discrete resistor-divider networks for safe interoperability.
JM38510/32803BSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 20-CFlatPack
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-CFP
JM38510/32803BSA FAQ
1.How can I place an order for JM38510/32803BSA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/32803BSA 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 JM38510/32803BSA reliable?
The price and inventory of JM38510/32803BSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/32803BSA is usually 5 days.
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4.How is shipping managed for JM38510/32803BSA?
JM38510/32803BSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/32803BSA 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 JM38510/32803BSA?
For technical support, including JM38510/32803BSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/32803BSA requirements.
6.How does Aetrix verify that JM38510/32803BSA is sourced from the original manufacturer or authorized distributors?
All JM38510/32803BSA 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 JM38510/32803BSA meets industry standards.
7.What is the process for return or replacement of JM38510/32803BSA?
All JM38510/32803BSA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/32803BSA, 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 JM38510/32803BSA part is unused and in its original packaging.
Return procedure for JM38510/32803BSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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