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Texas Instruments JM38510/34803B2A
- Part No.:
- JM38510/34803B2A
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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JM38510/34803B2A.pdf
- Description:
- 54F245 OCTAL BUS TRANSCEIVERS WI
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Product details
Overview
JM38510/34803B2A from Texas Instruments is a military-grade octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in high-reliability systems. It features direction control (DIR), output enable (OE), ±55°C to +125°C operating range, 20-pin LCCC package, and supports up to 6 ns propagation delay at 5 V.
For engineers reviewing the JM38510/34803B2A datasheet, JM38510/34803B2A pinout, JM38510/34803B2A application, or JM38510/34803B2A equivalent, this page delivers verified electrical specs, military-qualified thermal performance, 3-state isolation behavior, and precise pin-function mapping per TI SDFS010A revision October 1993.
Technical Context
The JM38510/34803B2A implements TTL-compatible logic with dual 8-bit bidirectional data paths controlled by DIR and OE inputs. Its 3-state outputs provide bus isolation when OE is high, and direction selection (A→B or B→A) is determined solely by DIR level.
It operates over full military temperature range (–55°C to +125°C) with supply voltage 4.5 V to 5.5 V, supports 48 mA low-level output current on A-side and 96 mA on B-side, and meets MIL-PRF-38535 Class B requirements per its QML qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL systems and margin against rail droop. |
| Operating Temperature | –55°C to +125°C - Qualified for airborne, spaceborne, and ground-based military platforms requiring extreme thermal resilience. |
| Propagation Delay | Max 6 ns (tPLH/tPHL) - Enables reliable operation in high-speed digital backplanes up to ~160 MHz clock-equivalent timing. |
| Output Drive | A-side: 40 mA sink; B-side: 96 mA sink - Supports direct connection to heavily loaded buses without external buffering. |
| 3-State Isolation | OE high disables all outputs to high-impedance - Prevents bus contention during system reset, power sequencing, or multi-master arbitration. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Matches standard TTL logic families for seamless interfacing with legacy military digital subsystems. |
| Package Type | 20-pin LCCC (FK drawing) - Hermetically sealed ceramic package with leadless construction for superior moisture resistance and mechanical stability. |
Pinout & Package
Package: 20-pin Ceramic Leadless Chip Carrier (LCCC), FK package drawing, hermetically sealed, no leads, soldered via metallized perimeter pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: Low enables B→A data flow; High enables A→B data flow. |
| 2–9 | A1–A8 | 8-bit bidirectional data port A - Connects to local subsystem bus; driven or received depending on DIR state. |
| 10 | GND | Signal reference ground - Must be low-inductance connection to minimize switching noise coupling. |
| 11–18 | B1–B8 | 8-bit bidirectional data port B - Interfaces to remote or master bus; functionally symmetric with A-port. |
| 19 | OE | Output enable active-low - Driven high to isolate both A and B ports electrically from the bus. |
| 20 | VCC | Positive supply - Requires local 5 V decoupling capacitor (≤100 nF) adjacent to pin for transient current handling. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Data Flow | Single DIR pin selects A→B or B→A path - Reduces control wiring count vs. separate transmit/receive transceivers. |
| Full Military Qualification | QML-38535 Class B certified - Meets screening, burn-in, and lot acceptance test requirements for defense-critical applications. |
| High-Current B-Side Outputs | 96 mA sink capability on B1–B8 - Drives long traces, multiple TTL loads, or unterminated stubs without signal degradation. |
| Low Propagation Skew | Max 1 ns skew between channels - Ensures simultaneous 8-bit data validity critical for synchronous bus protocols. |
| Robust Input Protection | –1.2 V to 7 V input voltage range - Withstands ESD events and bus fault conditions without latch-up or damage. |
Applications
| Avionics Data Bus Interface | Tactical Radios Baseband Link |
|---|---|
|
Use Scenario: Interfacing mission computer ARINC-429 interface logic to a discrete I/O expansion module in fighter jet avionics bay. IC Role / Device Role / Timing Role: Bidirectional bus transceiver isolating processor bus from ruggedized I/O backplane under vibration and thermal cycling. Use Value: 3-state isolation prevents bus contention during hot-swap of LRUs; –55°C to +125°C rating ensures operation across flight envelope extremes. |
Use Scenario: Level-shifting and direction control between baseband DSP and RF front-end ASIC in manpack tactical radio. IC Role / Device Role / Timing Role: Synchronizing parallel 8-bit data transfers between two clock domains while maintaining signal integrity on 15 cm PCB traces. Use Value: 6 ns max propagation delay enables deterministic timing alignment; hermetic LCCC package resists humidity-induced corrosion in field-deployed units. |
| Ground Vehicle C4I Systems | Satellite Payload Command Decoder |
|
Use Scenario: Enabling shared memory access between vehicle navigation controller and electronic warfare subsystem in armored command vehicle. IC Role / Device Role / Timing Role: Bus arbitrator and direction manager for dual-processor memory-mapped I/O sharing over MIL-STD-1553 auxiliary bus. Use Value: 96 mA B-side drive supports long harness runs to distributed chassis; OE-controlled isolation prevents cross-talk during processor resets. |
Use Scenario: Routing telemetry and command words between radiation-hardened microcontroller and payload FPGA in low-earth orbit satellite. IC Role / Device Role / Timing Role: Radiation-tolerant data bridge ensuring bit-accurate transfer of uplink commands and downlink status packets. Use Value: Ceramic LCCC package provides inherent TID tolerance; 40 mA A-side drive matches FPGA I/O strength for reliable capture timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54F245FK | Identical electrical specs, same LCCC (FK) package, identical military temperature range - direct form-fit-function replacement. | No functional difference; SNJ54F245FK uses TI's legacy military part numbering but shares identical die, screening, and qualification. | Select SNJ54F245FK only if legacy BOM compliance or procurement system mandates TI's historical nomenclature. |
| JM38510/34803BRA | Same functionality and specs, but packaged in 20-pin CDIP (J package) instead of LCCC - through-hole mounting, lower thermal conductivity, larger footprint. | Preferred where manual rework, socketing, or legacy board compatibility is required; unsuitable for high-vibration or hermetic sealing needs. | Choose JM38510/34803BRA for prototyping, repair, or systems constrained to DIP footprints; use JM38510/34803B2A for production-grade hermetic reliability. |
Compared with SNJ54F245FK, JM38510/34803B2A offers identical performance but reflects updated DoD standardization; versus JM38510/34803BRA, it trades socketability for superior thermal management and vibration resistance via LCCC packaging.
Availability
JM38510/34803B2A is available at Aetrix Electronics and suitable for avionics data bus interface, tactical radios baseband link, and ground vehicle C4I systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JM38510/34803B2A 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 U.S.-based semiconductor manufacturer founded in 1930, specializing in analog, embedded processing, and high-reliability military ICs with global manufacturing and qualification infrastructure.
JM38510/34803B2A belongs to TI's 54F logic family - engineered for high-speed, radiation-resilient, and thermally robust operation in defense electronics where failure is not an option.
FAQ
What is the maximum operating temperature range for JM38510/34803B2A?
JM38510/34803B2A is characterized for continuous operation from –55°C to +125°C, meeting MIL-PRF-38535 Class B environmental requirements. This range is validated across all electrical parameters including propagation delay, output drive, and input thresholds - no derating is required at temperature extremes.
Does JM38510/34803B2A support 3.3 V logic interfaces?
No, JM38510/34803B2A is a 5 V TTL-family device with VIH = 2.0 V minimum and VIL = 0.8 V maximum; it is not 3.3 V tolerant. Direct connection to 3.3 V systems requires level-shifting circuitry, as input voltages below 2.0 V may not register as valid high logic levels.
What package type does JM38510/34803B2A use, and is it hermetically sealed?
JM38510/34803B2A uses a 20-pin ceramic leadless chip carrier (LCCC), package drawing FK. Yes, it is hermetically sealed per MIL-STD-883 method 1014, providing immunity to moisture ingress and enabling use in high-humidity or vacuum environments typical of aerospace applications.
How does the direction control (DIR) pin function in JM38510/34803B2A?
In JM38510/34803B2A, the DIR pin is active-high: when DIR = high, data flows from A-bus to B-bus; when DIR = low, data flows from B-bus to A-bus. This single-pin control eliminates need for dual-control signals and simplifies routing in space-constrained layouts.
Is JM38510/34803B2A pin-compatible with commercial SN74F245 variants?
No - JM38510/34803B2A uses the 20-pin LCCC (FK) package, whereas commercial SN74F245 variants use SOIC (DW), SSOP (DB), or PDIP (N) packages. Pin functions are identical, but physical layout, thermal characteristics, and mounting methods differ significantly.
JM38510/34803B2A 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:
- -
- Supplier Device Package:
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JM38510/34803B2A FAQ
1.How can I place an order for JM38510/34803B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/34803B2A 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 JM38510/34803B2A reliable?
The price and inventory of JM38510/34803B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/34803B2A is usually 5 days.
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JM38510/34803B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/34803B2A 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 JM38510/34803B2A?
For technical support, including JM38510/34803B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/34803B2A requirements.
6.How does Aetrix verify that JM38510/34803B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/34803B2A 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 JM38510/34803B2A meets industry standards.
7.What is the process for return or replacement of JM38510/34803B2A?
All JM38510/34803B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/34803B2A, 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 JM38510/34803B2A part is unused and in its original packaging.
Return procedure for JM38510/34803B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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