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Texas Instruments JM38510/65503BRA
- Part No.:
- JM38510/65503BRA
- Manufacturer:
- Texas Instruments
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- -
- Datasheet:
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JM38510/65503BRA.pdf
- Description:
- 54HC245 OCTAL BUS TRANSCEIVERS W
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Product details
Overview
JM38510/65503BRA 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 harsh-environment systems. It operates across 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 12 ns (VCC = 4.5 V, CL = 50 pF), and supports –55°C to +125°C operation in CDIP-20 packaging - used in avionics backplane interfaces requiring radiation-tolerant signal isolation.
For engineers reviewing the JM38510/65503BRA datasheet, JM38510/65503BRA pinout, JM38510/65503BRA application, or JM38510/65503BRA equivalent, key selection criteria include its MIL-PRF-38535 qualification, DIR/OE dual-control logic, high-impedance bus isolation capability, and compatibility with LSTTL loads (up to 15) in deterministic timing-critical subsystems.
Technical Context
The JM38510/65503BRA implements CMOS-based bidirectional bus interface logic with independent direction (DIR) and output-enable (OE) controls. Its functional modes are strictly defined: OE = low enables transceivers, DIR = low routes B→A data, DIR = high routes A→B data; OE = high forces all outputs into high-impedance state regardless of DIR.
It features slow-edge-rate design to suppress output ringing, low input current (≤1 μA max), and robust ESD protection (±3000 V HBM). All parameters are tested per MIL-PRF-38535 requirements, with absolute maximum ratings including VCC = −0.5 V to 7 V and operating junction temperature up to 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing (e.g., 3.3 V µC to 5 V peripheral bus) |
| Propagation Delay (tpd) | 12 ns typical at VCC = 4.5 V, CL = 50 pF - enables ≤40 MHz sustained data throughput in synchronous control loops |
| Output Drive Strength | ±6 mA at VCC = 5 V - directly drives 15 LSTTL loads without external buffers |
| Operating Temperature | –55°C to +125°C - qualified for airborne and space-qualified chassis-mounted applications |
| Input Leakage Current | ≤1 μA max - ensures reliable logic-level retention during low-power standby in battery-backed modules |
| ESD Rating (HBM) | ±3000 V - meets MIL-STD-883 Class 3015.8 for handling in uncontrolled environments |
| Quiescent Current (ICC) | 80 μA max at VCC = 6 V - enables low-static-power operation in always-on monitoring circuits |
Pinout & Package
Package: Ceramic Dual-In-Line Package (CDIP), 20-pin, body size 24.33 mm × 6.35 mm, hermetically sealed, MIL-STD-883 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Determines data flow direction: low = B→A, high = A→B; must be stable before OE activation |
| 2–9 (A1–A8) | Port A I/O Terminals | Bidirectional data lines for source/sink connection to microcontroller or FPGA address/data bus |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output currents; requires low-inductance PCB tie to system ground plane |
| 11–18 (B1–B8) | Port B I/O Terminals | Bidirectional data lines for connection to memory, peripheral, or backplane bus; electrically isolated when OE = high |
| 19 (OE) | Output Enable Input | Active-low enable: low = transceiver enabled, high = all A/B pins in high-Z state - critical for bus arbitration |
| 20 (VCC) | Power Supply Input | Single-supply rail (2–6 V); requires local 0.1 μF ceramic bypass capacitor placed ≤2 mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2–6 V) | Enables interoperability across legacy 5 V and modern 3.3 V subsystems without level-shifting circuitry |
| High-current 3-state outputs | Drives up to 15 LSTTL loads directly - eliminates need for external bus drivers in compact avionics modules |
| Low power consumption | 80 μA max ICC allows integration into thermally constrained enclosures with minimal derating |
| MIL-PRF-38535 qualification | Full screening per Method 5005 - includes burn-in, temperature cycling, and parametric testing for mission-critical reliability |
| Slow edge-rate design | Minimizes overshoot/undershoot on long traces - reduces EMI in densely packed flight control PCBs |
Applications
| Avionics Data Bus Interface | Rad-Hard Telemetry Transceiver |
|---|---|
|
Use Scenario: Bidirectional data exchange between flight computer (3.3 V) and analog sensor interface board (5 V) in UAV guidance system. IC Role / Device Role / Timing Role: Level-translating bus transceiver managing A→B (sensor read) and B→A (command write) paths under DIR control, with OE-gated isolation during fault recovery. Use Value: Eliminates discrete level shifters; ±6 mA drive ensures signal integrity over 15 cm ribbon cable runs at 10 MHz burst rates. |
Use Scenario: Radiation-tolerant telemetry link between onboard processor and RF modem in LEO satellite payload. IC Role / Device Role / Timing Role: Isolating command/data channels during power-up sequencing and safe-mode transitions using OE-controlled high-Z state. Use Value: MIL-PRF-38535 screening guarantees latch-up immunity and parameter stability after 50 krad(Si) TID exposure. |
| Secure Ground Station Backplane | Tactical Vehicle CAN Gateway Interface |
|
Use Scenario: Secure data routing between encrypted comms module and mission computer across shielded backplane in mobile command post. IC Role / Device Role / Timing Role: Direction-controlled bus buffer preventing unauthorized data leakage via physical layer isolation when OE is deasserted. Use Value: High-impedance state (<1 μA leakage) blocks sneak paths during cryptographic key loading sequences. |
Use Scenario: Interfacing 3.3 V CAN controller to 5 V legacy vehicle diagnostics port in armored vehicle OBD-II gateway. IC Role / Device Role / Timing Role: Voltage-agile transceiver enabling bidirectional CAN frame relay while maintaining signal edge integrity per ISO 11898-2. Use Value: 12 ns tpd ensures <5% timing budget impact on 500 kbps CAN bit timing; slow edges suppress conducted emissions in noisy engine bays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN54HC245J | Same CDIP-20 package and MIL-PRF-38535 qualification, but rated only to –55°C to +125°C without extended life-test screening | Lacks full QML-Q screening; suitable for non-safety-critical defense platforms where cost is prioritized over longevity | Select SN54HC245J if program lifecycle is <10 years and radiation tolerance is not required |
| SNJ54HC245FK | LCCC-20 ceramic package (8.4 mm × 8.4 mm), same electrical specs, higher thermal resistance (RθJA = 53.9°C/W vs. 57.0°C/W for CDIP) | Better vibration resistance and lower mass; preferred for high-G launch environments but requires different PCB footprint | Choose SNJ54HC245FK when mechanical shock survivability exceeds thermal performance requirements |
Compared with SN54HC245J and SNJ54HC245FK, JM38510/65503BRA provides the highest assurance of long-term parametric stability in continuous operation, validated through accelerated life testing per MIL-PRF-38535 Appendix A, making it the default choice for Tier-1 aerospace prime contracts.
Availability
JM38510/65503BRA is available at Aetrix Electronics and suitable for avionics data bus interface, rad-hard telemetry transceiver, secure ground station backplane, and tactical vehicle CAN gateway interface applications requiring stable component supply across extended product lifecycles.
Supply support for JM38510/65503BRA 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 aerospace markets.
JM38510/65503BRA belongs to TI's military logic portfolio, engineered specifically for deterministic, radiation-resilient digital interfacing in safety-critical platforms where failure is not an option.
FAQ
What is the operating temperature range of the JM38510/65503BRA?
The JM38510/65503BRA is specified for operation from –55°C to +125°C, fully screened per MIL-PRF-38535 requirements. This range is validated across all electrical parameters including propagation delay, output drive, and leakage current - ensuring reliable function in jet engine bays, satellite thermal vacuums, and desert-deployed vehicle electronics. The JM38510/65503BRA maintains parameter stability without derating throughout this full range.
Does the JM38510/65503BRA require external pull-up resistors on DIR or OE pins?
No external pull-up resistors are required on DIR or OE for basic functionality, but TI recommends tying OE to VCC via a pull-up resistor during power-up to guarantee high-impedance state before logic initialization. The JM38510/65503BRA has no internal weak pull-ups; floating OE could cause bus contention. DIR may float only if direction is fixed by system design - otherwise, it must be actively driven. This behavior is identical across all SNx4HC245 variants, including the JM38510/65503BRA.
How does the JM38510/65503BRA differ from commercial SN74HC245 devices?
The JM38510/65503BRA differs from commercial SN74HC245 devices in three critical ways: it undergoes full MIL-PRF-38535 screening (including burn-in and radiation testing), is rated for –55°C to +125°C with guaranteed parameters across that range, and uses hermetic CDIP packaging instead of plastic SOIC/SSOP. Commercial variants lack QML certification, have narrower temp ranges (–40°C to +85°C), and are not screened for long-term reliability in mission-critical systems - unlike the JM38510/65503BRA.
Can the JM38510/65503BRA interface between 3.3 V and 5 V buses without level shifters?
Yes, the JM38510/65503BRA supports true mixed-voltage operation: with VCC = 3.3 V, it accepts 5 V-tolerant inputs (VIH up to VCC + 0.5 V per test conditions), and with VCC = 5 V, it drives 3.3 V logic-high thresholds (VOH ≥ 3.98 V at IOH = –6 mA). This eliminates external level shifters in cross-voltage bus bridging - a core design advantage confirmed in TI's SCLS131E datasheet for the JM38510/65503BRA and all SNx4HC245 family members.
Is the JM38510/65503BRA pin-compatible with other SN54HC245 variants?
Yes, the JM38510/65503BRA is pin-compatible with all SN54HC245 variants in CDIP-20 packaging, including SN54HC245J and 5962-8408501VRA. Pin functions (DIR, A1–A8, GND, B1–B8, OE, VCC), spacing (2.54 mm), and mechanical outline match exactly. No PCB redesign is needed when substituting within the same package type - verified across TI's official orderable addendum and mechanical drawings for the JM38510/65503BRA.
JM38510/65503BRA 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:
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- Input Type:
- -
- Output Type:
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- Current - Output High, Low:
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- Voltage - Supply:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
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- Mounting Type:
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JM38510/65503BRA FAQ
1.How can I place an order for JM38510/65503BRA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65503BRA 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 JM38510/65503BRA reliable?
The price and inventory of JM38510/65503BRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65503BRA is usually 5 days.
3.What payment methods are accepted for JM38510/65503BRA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JM38510/65503BRA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JM38510/65503BRA?
JM38510/65503BRA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/65503BRA 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 JM38510/65503BRA?
For technical support, including JM38510/65503BRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65503BRA requirements.
6.How does Aetrix verify that JM38510/65503BRA is sourced from the original manufacturer or authorized distributors?
All JM38510/65503BRA 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 JM38510/65503BRA meets industry standards.
7.What is the process for return or replacement of JM38510/65503BRA?
All JM38510/65503BRA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65503BRA, 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 JM38510/65503BRA part is unused and in its original packaging.
Return procedure for JM38510/65503BRA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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