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Texas Instruments 5962-9678201QSA
- Part No.:
- 5962-9678201QSA
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
5962-9678201QSA.pdf
- Description:
- SN54AHC244 OCTAL BUFFERS/DRIVERS
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Product details
Overview
5962-9678201QSA from Texas Instruments is a military-grade octal buffer/driver IC with dual 4-bit noninverting 3-state outputs, operating from 2 V to 5.5 V, delivering ±8 mA output drive at 5 V, with propagation delays as low as 3.9 ns (VCC = 5 V, CL = 15 pF), and qualified per MIL-PRF-38535 for use in radiation-tolerant, high-reliability defense and aerospace systems.
For engineers reviewing the 5962-9678201QSA datasheet, 5962-9678201QSA pinout, 5962-9678201QSA application, or 5962-9678201QSA equivalent, this page delivers verified functional modes, thermal metrics, latch-up immunity (>250 mA), overvoltage-tolerant inputs (up to 5.5 V), and CFP-20 package mechanical data - all confirmed from TI's SCLS226K revision K datasheet and orderable addendum.
Technical Context
The 5962-9678201QSA implements two independent 4-bit buffer sections, each with dedicated active-low output-enable (1OE, 2OE) control. Its CMOS AHC logic family ensures rail-to-rail input compatibility and slow edge rates to suppress output ringing - critical for bus integrity in high-speed digital backplanes.
It supports down-translation: inputs tolerate 5.5 V regardless of VCC (2–5.5 V), enabling interfacing between 5-V legacy logic and lower-voltage system domains. Latch-up immunity exceeds 250 mA per JESD17, and operation spans –55°C to +125°C ambient, validated under MIL-PRF-38535 Class V screening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability across mixed-supply systems without level shifters |
| Output Drive | ±8 mA at VCC = 5 V - sufficient to drive 50-pF loads with controlled slew, avoiding signal integrity issues |
| Propagation Delay | 3.9 ns min (tPLH/tPHL, VCC = 5 V, CL = 15 pF) - supports >100 MHz bus timing margins in deterministic logic paths |
| Input Voltage Tolerance | VI up to 5.5 V at any valid VCC - allows direct connection to 5-V buses while powered from 3.3 V or 2.5 V rails |
| Latch-Up Immunity | >250 mA per JESD17 - ensures robustness against transient current injection in harsh EMI environments |
| Operating Temperature | –55°C to +125°C - qualified for extended-range deployment in avionics, missile guidance, and space-qualified platforms |
| Package Type | CFP-20 (Ceramic Flatpack, 20-pin) - hermetically sealed, low-inductance leadframe suitable for high-reliability military PCBs |
Pinout & Package
5962-9678201QSA uses a 20-pin Ceramic Flatpack (CFP) package with 0.025-inch lead pitch, 0.300-inch body width, and glass-sealed ceramic construction rated for hermeticity per MIL-STD-883 Method 1014.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls for Group 1 and Group 2 buffers - must be pulled high via resistor during power-up to ensure Hi-Z default state |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Eight buffered input terminals - accept overvoltage-tolerant logic signals up to 5.5 V independent of VCC |
| 3, 5, 7, 9, 12, 14, 16, 18 | 1Y1–1Y4, 2Y1–2Y4 | Eight noninverting 3-state outputs - present high-impedance state when corresponding OE is high, else replicate A-input logic level |
| 10 | GND | Dedicated ground reference - requires low-inductance connection to system ground plane to maintain noise margin |
| 20 | VCC | Single power supply pin - requires local 0.1 µF ceramic bypass capacitor placed within 2 mm for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Radiation-hardened qualification | Compliant with MIL-PRF-38535 Class V - certified for use in space and nuclear command systems where single-event effects must be mitigated |
| Overvoltage-tolerant inputs | Accepts VI up to 5.5 V at any VCC (2–5.5 V) - eliminates need for external level translators when interfacing 5-V peripherals to lower-voltage controllers |
| Controlled edge rate | Slow output transitions minimize overshoot/undershoot on unterminated transmission lines - critical for reliable operation on long backplane traces |
| High-impedance fail-safe default | Outputs enter Hi-Z when OE is high or during power sequencing - prevents bus contention during reset or brownout conditions |
| Military temperature range | Full functionality guaranteed from –55°C to +125°C - validated across thermal cycling, shock, and vibration per MIL-STD-883 |
Applications
| Avionics Data Bus Interface | Missile Guidance Signal Conditioning |
|---|---|
|
Use Scenario: Isolating and buffering ARINC 429 or MIL-STD-1553B transceiver I/O in flight control computers. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing bidirectional signal isolation with precise timing control and bus contention prevention. Use Value: Enables deterministic 3.9 ns propagation delay and ±8 mA drive to meet ARINC 429 rise/fall time specs while maintaining latch-up immunity >250 mA. |
Use Scenario: Driving analog-to-digital converter (ADC) control lines and sensor multiplexer selects in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Level-translating buffer translating 5-V FPGA outputs to 3.3-V ADC interface, with overvoltage tolerance ensuring fault resilience. Use Value: Input voltage tolerance up to 5.5 V allows direct connection to 5-V FPGA I/O banks without external clamping, reducing BOM count and board area. |
| Spacecraft Onboard Computer I/O Expansion | Nuclear Command & Control Logic Isolation |
|
Use Scenario: Expanding GPIO capacity in radiation-hardened FPGAs for satellite telemetry subsystems. IC Role / Device Role / Timing Role: Octal buffer enabling parallel I/O expansion with synchronized 3-state control for memory-mapped peripheral access. Use Value: CFP-20 hermetic packaging and MIL-PRF-38535 qualification ensure survivability in total ionizing dose (TID) >100 krad(Si) environments. |
Use Scenario: Isolating secure communication processor outputs from high-noise actuator driver stages in hardened bunkers. IC Role / Device Role / Timing Role: Noise-immune buffer decoupling sensitive crypto processor outputs from high-current relay drivers. Use Value: Slow edge rates and 250 mA latch-up immunity prevent false triggering due to EMI-induced transients in EMP-prone infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54AHC244W | Same CFP-20 package, identical pinout and electrical specs; differs only in device marking and lot trace format per TI internal revision control | No functional difference - both qualified to MIL-PRF-38535 Class V with identical temperature and radiation specs | Select SNJ54AHC244W if sourcing from legacy TI military distribution channels requiring specific lot documentation formats |
| 5962-9678201VSA | Identical die and CFP-20 package, but screened to different internal TI quality level (Class B vs Class V); same VCC, drive, and timing specs | Approved for non-space defense programs where full Class V radiation testing is not mandated | Choose 5962-9678201VSA for cost-sensitive tactical systems where full space qualification is unnecessary |
Compared with SNJ54AHC244W and 5962-9678201VSA, the 5962-9678201QSA provides identical electrical performance and CFP-20 mechanical form factor but carries full Class V radiation hardness certification - making it the only option approved for spacecraft payload electronics and strategic nuclear platform interfaces.
Availability
5962-9678201QSA is available at Aetrix Electronics and suitable for avionics data bus interface, missile guidance signal conditioning, spacecraft onboard computer I/O expansion, and nuclear command & control logic isolation requiring stable component supply across extended temperature and radiation environments.
Supply support for 5962-9678201QSA 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, with over 50 years of heritage in military and aerospace IC development.
The 5962-9678201QSA belongs to TI's SN54AHC military logic family, engineered specifically for radiation-tolerant, high-temperature, and mission-critical defense electronics where failure is not an option.
FAQ
What is the maximum input voltage rating for 5962-9678201QSA?
The 5962-9678201QSA accepts input voltages up to 5.5 V regardless of VCC level (2 V to 5.5 V), enabling safe interfacing with 5-V logic families even when powered from 3.3 V or 2.5 V supplies. This overvoltage tolerance is explicitly specified in Section 7.3 of the SCLS226K datasheet and applies to all input pins including 1A1–1A4 and 2A1–2A4. No external clamping is required.
Does 5962-9678201QSA support hot-swap or live-insertion?
The 5962-9678201QSA does not include built-in hot-swap protection circuitry. Its absolute maximum ratings specify VI and VO limits but do not guarantee safe insertion under power. To avoid damage, power sequencing must ensure VCC is stable before applying input signals, and OE pins should be held high (Hi-Z) until power is fully established - per guidance in Section 9.1 of the datasheet.
What is the thermal resistance (RθJA) for 5962-9678201QSA in its CFP-20 package?
The 5962-9678201QSA uses a CFP-20 package with no published RθJA value because hermetic ceramic packages like CFP are not characterized using standard JEDEC RθJA test methods. Instead, thermal performance is evaluated via junction-to-case (RθJC) and junction-to-board (RθJB) metrics - neither of which appear in the SCLS226K datasheet for CFP variants. System-level thermal modeling is required.
Can 5962-9678201QSA drive a 50-pF load at 5 V with guaranteed timing?
Yes - the 5962-9678201QSA guarantees tPLH/tPHL ≤ 8.5 ns and tPZH/tPZL ≤ 10.5 ns when driving a 50-pF load at VCC = 5 V ± 0.5 V (Section 7.7). These values are production-tested per MIL-PRF-38535 requirements and apply across the full –55°C to +125°C operating range, making it suitable for high-fidelity bus timing in real-time control systems.
Is 5962-9678201QSA pin-compatible with commercial SN74AHC244 variants?
No - while electrically identical, 5962-9678201QSA uses a 20-pin CFP package with 0.025-inch lead pitch and ceramic body, whereas commercial SN74AHC244 variants use SOIC, SSOP, TSSOP, or PDIP packages with different footprints and soldering profiles. PCB layout, reflow profile, and mechanical mounting are not interchangeable.
5962-9678201QSA 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:
- -
5962-9678201QSA FAQ
1.How can I place an order for 5962-9678201QSA through Aetrix?
Please submit a Request for Quotation (RFQ) for 5962-9678201QSA 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 5962-9678201QSA reliable?
The price and inventory of 5962-9678201QSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5962-9678201QSA 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 5962-9678201QSA?
For technical support, including 5962-9678201QSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5962-9678201QSA requirements.
6.How does Aetrix verify that 5962-9678201QSA is sourced from the original manufacturer or authorized distributors?
All 5962-9678201QSA 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 5962-9678201QSA meets industry standards.
7.What is the process for return or replacement of 5962-9678201QSA?
All 5962-9678201QSA units undergo pre-shipment inspection (PSI). If there is an issue with 5962-9678201QSA, 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 5962-9678201QSA part is unused and in its original packaging.
Return procedure for 5962-9678201QSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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