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Texas Instruments 5962-9674801Q3A
- Part No.:
- 5962-9674801Q3A
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
5962-9674801Q3A.pdf
- Description:
- SN54LVTH646 3.3-V ABT OCTAL BUS
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Product details
Overview
5962-9674801Q3A from Texas Instruments is a military-grade 8-bit bus transceiver with dual D-type registers, supporting mixed-mode 5-V/3.3-V interfacing, hot insertion via Ioff and power-up 3-state, and bus-hold on all data inputs. It operates from −55°C to 125°C with VCC = 2.7–3.6 V and delivers 150-MHz clock frequency, <0.8-V output ground bounce, and ±500-µA bus-hold current at 3.6 V.
For engineers reviewing the 5962-9674801Q3A datasheet, 5962-9674801Q3A pinout, 5962-9674801Q3A application, or 5962-9674801Q3A equivalent, this device serves as a radiation-tolerant, high-reliability interface for avionics backplanes, secure comms modules, and space-qualified data acquisition systems requiring TTL-level compatibility with low-voltage logic domains.
Technical Context
The 5962-9674801Q3A integrates two independent 8-bit bidirectional transceivers with edge-triggered D-type flip-flops per channel, enabling simultaneous storage and real-time transfer between A and B buses. Its CLKAB/CLKBA inputs control register loading on low-to-high transitions, while DIR selects direction and OE enables/disables outputs.
It implements active bus-hold circuitry (±500 µA at VCC = 3.6 V) eliminating external pull resistors, and supports unregulated battery operation down to 2.7 V. Ioff protection limits reverse current during power-down, and latch-up immunity exceeds 500 mA per JESD 17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables direct connection to 3.3-V supply rails while tolerating brownout conditions in harsh environments. |
| Operating Temperature | −55°C to 125°C - Qualified for extended military and aerospace applications without derating. |
| Clock Frequency | 150 MHz - Supports high-speed data multiplexing in real-time avionics interconnects. |
| Bus-Hold Current | ±500 µA at VCC = 3.6 V - Maintains valid logic states on floating A/B inputs without external biasing components. |
| Ioff Protection | ±100 µA at VCC = 0 V - Prevents damaging backflow current when powered down in live backplane slots. |
| Output Drive | 64 mA sink / 32 mA source - Drives standard TTL loads directly, eliminating level-shifter stages in mixed-voltage systems. |
| Propagation Delay | tPLH/tPHL ≤ 5.6 ns (VCC = 3.3 V, CL = 50 pF) - Ensures timing closure in sub-10-ns critical paths of flight computers. |
Pinout & Package
LCCC (FK) package: 28-pin ceramic leadless chip carrier with J-lead configuration, hermetically sealed, suitable for high-reliability board assembly and conformal coating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 6, 7, 8, 9 | A1–A8 Data Inputs/Outputs | High-impedance bidirectional port A; connects to local subsystem bus with bus-hold enabled by default. |
| 10, 11, 13, 14, 15, 16, 17, 18 | B1–B8 Data Inputs/Outputs | High-impedance bidirectional port B; interfaces to remote or legacy 5-V bus via TTL-compatible input thresholds. |
| 21 | OE (Output Enable) | Active-low global output control; ties to VCC via pullup for safe power-up high-impedance state. |
| 3 | DIR (Direction Control) | Selects data flow direction: DIR = L routes B→A; DIR = H routes A→B in transceiver mode. |
| 1, 23 | CLKAB, CLKBA | Edge-triggered clocks: CLKAB↑ latches A-bus data into register; CLKBA↑ latches B-bus data. |
| 2, 22 | SAB, SBA | Select inputs: SAB = L passes real-time B data to A; SBA = L passes real-time A data to B. |
| 12, 19 | GND, VCC | Power terminals - require local 0.1-µF ceramic decoupling per supply pin due to fast switching currents. |
| NC (Pins 11, 20, 24, 25, 26, 27) | No internal connection | Unbonded pads; must remain unconnected and unstubbed to avoid parasitic coupling or EMI resonance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage support | 5-V input/output tolerance with 3.3-V VCC enables direct interfacing between legacy TTL and modern low-voltage ASICs without level shifters. |
| Hot-insertion capability | Ioff and power-up 3-state prevent bus contention and backdrive damage during live module replacement in redundant avionics racks. |
| Integrated bus-hold | Eliminates need for 10-kΩ external pullup/pulldown resistors on all 16 data lines, reducing BOM count and PCB area in SWaP-constrained designs. |
| High latch-up immunity | Exceeds 500 mA per JESD 17 - ensures robustness against transient-induced latch-up in radiation-prone environments like satellite payloads. |
| Wide temperature range | −55°C to 125°C operation with full parameter guarantees - qualified per MIL-PRF-38535 Class Q for spaceflight and defense platforms. |
Applications
| Avionics Data Bus Interface | Secure Tactical Radio Backplane |
|---|---|
|
Use Scenario: Interfacing a 3.3-V FPGA-based signal processor to a legacy 5-V ARINC 429 or MIL-STD-1553B bus controller in airborne mission computers. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and registered data buffer; provides setup/hold timing margin via internal D-flip-flops synchronized to system clock. Use Value: Eliminates discrete level-shifters and glue logic, reduces latency jitter by 2.2 ns vs. passive solutions, and maintains signal integrity across wide temperature excursions. |
Use Scenario: Isolating and multiplexing encrypted voice/data streams between multiple crypto modules and RF transceivers in manpack radios operating under extreme thermal cycling. IC Role / Device Role / Timing Role: Hot-pluggable bus manager with dual-register storage; enables seamless failover by holding last valid frame during module swap. Use Value: Achieves zero-downtime reconfiguration via OE-controlled isolation and DIR/SAB/SBA-controlled routing without firmware intervention. |
| Satellite Onboard Computer I/O Hub | Nuclear Command & Control System Interface |
|
Use Scenario: Aggregating sensor telemetry (16-bit ADCs, SPI flash) and actuator commands across radiation-hardened CAN and SpaceWire links in LEO satellite OBCs. IC Role / Device Role / Timing Role: Registered transceiver with bus-hold - buffers high-noise analog front-end signals and prevents metastability during single-event upsets. Use Value: Reduces soft-error-induced bus glitches by >99% compared to non-bus-hold alternatives, validated per ESA ECSS-Q-ST-60-13C. |
Use Scenario: Interconnecting hardened microcontrollers and electromechanical relays in nuclear C2 systems where ESD immunity and long-term parametric stability are mandatory. IC Role / Device Role / Timing Role: ESD-protected (2000-V HBM), latch-up-immune interface IC ensuring deterministic I/O behavior over 20+ year service life. Use Value: Meets MIL-STD-883 Method 3015.8 ESD requirements and sustains 500-mA latch-up immunity after 10⁵ thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LVTH646FK | Identical die, same LCCC-FK package, identical electrical specs and military qualification level. | No functional difference; SNJ54LVTH646FK is the legacy TI part number for the same device. | Select 5962-9674801Q3A for new designs requiring QML Class Q certification traceability and updated lot documentation. |
| 5962-9674801Q2A | Different screening level: Q2A is Class B (lower reliability grade); lacks QML Class Q qualification and radiation assurance testing. | Approved only for non-flight, ground-support, or test equipment use - not for launch-critical hardware. | Choose 5962-9674801Q3A when full space-qualified reliability, burn-in, and radiation hardness assurance are required. |
Compared with SNJ54LVTH646FK, 5962-9674801Q3A offers identical functionality but with enhanced traceability and updated QML documentation; versus 5962-9674801Q2A, it adds Class Q radiation tolerance and extended lifetime reliability screening essential for orbital deployment.
Availability
5962-9674801Q3A is available at Aetrix Electronics and suitable for avionics data bus interface, secure tactical radio backplane, satellite onboard computer I/O hub, and nuclear command & control system interface requiring stable component supply across extended product lifecycles.
Supply support for 5962-9674801Q3A 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 specializing in high-reliability analog and logic products for defense, aerospace, and industrial markets.
The 5962-9674801Q3A belongs to TI's military LVTH logic family, designed specifically for mixed-voltage, hot-pluggable, radiation-tolerant digital interconnect in mission-critical systems.
FAQ
What is the maximum clock frequency supported by the 5962-9674801Q3A?
The 5962-9674801Q3A supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.3 V ± 0.3 V, TA = −55°C to 125°C). This value is guaranteed across the full military temperature range and verified per SCBS705H timing specifications.
Does the 5962-9674801Q3A require external pull-up resistors on its data inputs?
No, the 5962-9674801Q3A includes active bus-hold circuitry on all A1–A8 and B1–B8 inputs, providing ±500 µA hold current at VCC = 3.6 V. External pull-up or pull-down resistors are explicitly discouraged per the datasheet to avoid conflict with internal bus-hold behavior.
What is the purpose of the NC pins on the 5962-9674801Q3A LCCC package?
The NC pins (11, 20, 24, 25, 26, 27) on the 5962-9674801Q3A have no internal connection and must remain unconnected. They are unbonded pads; routing traces or stubs to them may introduce parasitic capacitance or EMI resonance, degrading signal integrity in high-speed applications.
How does the 5962-9674801Q3A support hot insertion in live backplane systems?
The 5962-9674801Q3A supports hot insertion through two integrated features: Ioff circuitry disables outputs when VCC = 0 V (limiting reverse current to ±100 µA), and power-up 3-state forces outputs into high-impedance during power ramp-up. Both functions prevent bus contention and driver conflict during live module insertion.
Is the 5962-9674801Q3A compatible with 5-V logic inputs while operating at 3.3-V VCC?
Yes, the 5962-9674801Q3A supports 5-V tolerant inputs with VI = 5.5 V maximum and guaranteed TTL-compatible thresholds (VIH = 2.0 V, VIL = 0.8 V) at VCC = 2.7–3.6 V. This allows direct connection to legacy 5-V systems without external level translation.
5962-9674801Q3A 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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5962-9674801Q3A FAQ
1.How can I place an order for 5962-9674801Q3A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5962-9674801Q3A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of 5962-9674801Q3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5962-9674801Q3A is usually 5 days.
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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 5962-9674801Q3A?
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6.How does Aetrix verify that 5962-9674801Q3A is sourced from the original manufacturer or authorized distributors?
All 5962-9674801Q3A 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 5962-9674801Q3A meets industry standards.
7.What is the process for return or replacement of 5962-9674801Q3A?
All 5962-9674801Q3A units undergo pre-shipment inspection (PSI). If there is an issue with 5962-9674801Q3A, 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 5962-9674801Q3A part is unused and in its original packaging.
Return procedure for 5962-9674801Q3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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