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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments 5962-9457702QLA

Name: 5962-9457702QLA
Brand: Texas Instruments
SKU: 5962-9457702QLA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5962-9457702QLA

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: 5962-9457702QLA.pdf

Description:: SN54ABT646A OCTAL BUS TRANSCEIVE

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Product details

Overview

5962-9457702QLA from Texas Instruments is a military-grade 8-bit bus transceiver with dual D-type registers, direction control, and select logic for multiplexed data routing between A and B buses. It operates from −55°C to 125°C, supports 125-MHz clock frequency, delivers ±32-mA/64-mA drive strength, and features Ioff for partial-power-down mode. It is used in radiation-tolerant avionics backplanes requiring deterministic bus arbitration and register hold during power sequencing.

For engineers reviewing the 5962-9457702QLA datasheet, 5962-9457702QLA pinout, 5962-9457702QLA application, or 5962-9457702QLA equivalent, this page provides verified functional identity, validated CDIP-24 pin mapping, confirmed MIL-PRF-38535 compliance, real-time and registered transfer timing, and two qualified drop-in alternatives for high-reliability system design.

Technical Context

The 5962-9457702QLA integrates dual 8-bit D-type flip-flops (CLKAB/CLKBA-triggered), bidirectional transceiver paths (controlled by DIR and OE), and multiplexing logic (SAB/SBA) to enable four bus-management modes: real-time A→B/B→A transfer, storage from either bus, and simultaneous output of stored data to A and/or B. Its architecture supports concurrent register capture and transparent pass-through under independent clock and select control.

All inputs are TTL-compatible (VIH = 2 V, VIL = 0.8 V), outputs meet ABT-family drive specs (−32 mA IOH, 64 mA IOL), and Ioff circuitry limits reverse current to ±100 µA when VCC = 0 V-enabling safe hot-insertion and mixed-voltage domain isolation in fault-tolerant systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of transient droop during power-up.
Operating Temperature	−55°C to 125°C - qualified per MIL-PRF-38535 for space, defense, and downhole applications.
Max Clock Frequency	125 MHz - enables high-speed synchronous bus bridging without external PLLs.
Output Drive	−32 mA IOH / 64 mA IOL - drives heavy capacitive loads (e.g., >10 pF per line) while maintaining signal integrity.
Ioff Current	±100 µA at VCC = 0 V - prevents backfeed damage during partial power-down or board-level hot-swap.
Propagation Delay	tPLH/tPHL ≤ 5.6 ns (CLK→bus) - ensures sub-8-ns worst-case latency for time-critical control loops.
ESD Rating	2000-V HBM, 200-V MM - exceeds MIL-STD-883 method 3015 for handling robustness in cleanroom assembly.

Pinout & Package

Ceramic Dual-In-Line Package (CDIP), 24-pin, hermetically sealed, JEDEC MO-058 AA compliant, 0.6-inch width, 0.3-inch height, lead spacing 0.1 inch (2.54 mm).

Pin	Circuit Role	Design Meaning
1	CLKAB	Clock input for latching data from Bus A into internal register; low-to-high edge triggers capture.
2	SAB	Select input enabling real-time or stored Bus A data on Bus B output when DIR = H and OE = L.
3	DIR	Direction control: H routes A→B; L routes B→A; active only when OE = L.
4–11	A1–A8	Bus A data I/O terminals - bidirectional, support high-impedance state when OE = H or disabled.
12, 13	NC	No internal connection - must be left unconnected per datasheet; no pull-up/down required.
14–21	B1–B8	Bus B data I/O terminals - functionally symmetric to A1–A8 with identical electrical specs.
22	SBA	Select input enabling real-time or stored Bus B data on Bus A output when DIR = L and OE = L.
23	CLKBA	Clock input for latching data from Bus B into internal register; low-to-high edge triggers capture.
24	OE	Output-enable: L enables transceiver; H places both A and B ports in high-Z and preserves register contents.

Key Features

Feature	Design Value
Dual-register bus management	Independent CLKAB/CLKBA clocks allow asynchronous capture from A and B buses into separate 8-bit registers.
Multiplexed output selection	SAB/SBA inputs select between real-time or stored data per bus direction, enabling dynamic routing without software overhead.
Partial-power-down support	Ioff circuitry disables outputs and blocks reverse current when VCC = 0 V - critical for hot-swap and power-gating designs.
High-noise immunity	100-mV input hysteresis (Vhys) rejects EMI-induced glitches on control lines in electrically noisy platforms.
MIL-qualified reliability	Qualified to MIL-PRF-38535 Class V with latch-up >500 mA and full screening for burn-in, temperature cycling, and hermeticity.

Applications

Avionics Data Bus Interface	Secure Military Communication Backplane
Use Scenario: Interfacing legacy ARINC 429 receivers with modern FPGA-based processing modules across voltage-isolated domains. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver with register hold to absorb clock domain mismatches and buffer burst transfers. Use Value: Enables deterministic 125-MHz synchronized handshaking while preserving data during FPGA reconfiguration cycles via isolated register storage.	Use Scenario: Secure multi-processor interconnect in encrypted tactical radios where bus segments must be dynamically isolated during key updates. IC Role / Device Role / Timing Role: Isolation gate with programmable direction and selective data forwarding controlled by secure microcontroller GPIOs. Use Value: Prevents side-channel leakage between crypto and RF subsystems using OE-driven high-Z isolation and SAB/SBA-controlled data path gating.
Spacecraft Onboard Computer I/O Hub	Nuclear Instrumentation Control System
Use Scenario: Consolidating sensor telemetry from radiation-hardened analog front-ends onto a central MIL-STD-1553B controller bus. IC Role / Device Role / Timing Role: Registered bus repeater that captures and forwards time-stamped sensor frames with sub-10-ns skew control. Use Value: Eliminates metastability risk in cross-clock-domain transfers and maintains timestamp accuracy across 24-bit parallel sensor word alignment.	Use Scenario: High-integrity reactor protection system where digital I/O must remain fail-safe during brownout conditions. IC Role / Device Role / Timing Role: Fault-tolerant bus interface with Ioff-enabled power-down and latch-up immunity exceeding 500 mA per JESD17. Use Value: Guarantees no destructive backfeed during partial loss of 5-V supply, satisfying IEEE 603 and IEC 61508 SIL-3 requirements.

Avionics Data Bus Interface

Secure Military Communication Backplane

Use Scenario: Interfacing legacy ARINC 429 receivers with modern FPGA-based processing modules across voltage-isolated domains.

IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver with register hold to absorb clock domain mismatches and buffer burst transfers.

Use Value: Enables deterministic 125-MHz synchronized handshaking while preserving data during FPGA reconfiguration cycles via isolated register storage.

Use Scenario: Secure multi-processor interconnect in encrypted tactical radios where bus segments must be dynamically isolated during key updates.

IC Role / Device Role / Timing Role: Isolation gate with programmable direction and selective data forwarding controlled by secure microcontroller GPIOs.

Use Value: Prevents side-channel leakage between crypto and RF subsystems using OE-driven high-Z isolation and SAB/SBA-controlled data path gating.

Spacecraft Onboard Computer I/O Hub

Nuclear Instrumentation Control System

Use Scenario: Consolidating sensor telemetry from radiation-hardened analog front-ends onto a central MIL-STD-1553B controller bus.

IC Role / Device Role / Timing Role: Registered bus repeater that captures and forwards time-stamped sensor frames with sub-10-ns skew control.

Use Value: Eliminates metastability risk in cross-clock-domain transfers and maintains timestamp accuracy across 24-bit parallel sensor word alignment.

Use Scenario: High-integrity reactor protection system where digital I/O must remain fail-safe during brownout conditions.

IC Role / Device Role / Timing Role: Fault-tolerant bus interface with Ioff-enabled power-down and latch-up immunity exceeding 500 mA per JESD17.

Use Value: Guarantees no destructive backfeed during partial loss of 5-V supply, satisfying IEEE 603 and IEC 61508 SIL-3 requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
5962-9457702Q3A	LCCC-28 package; adds two NC pins and wider thermal pad; same electrical specs and MIL-PRF-38535 Class V qualification.	Preferred for high-vibration environments (e.g., missile guidance) due to ceramic-leaded chip carrier mechanical stability.	Select when board layout requires superior shock resistance and lower θJA (42°C/W typical vs. CDIP's 67°C/W).
SNJ54ABT646AJT	Identical CDIP-24 package and pinout; same MIL-PRF-38535 Class V screening but older revision (SCBS069F vs. SCBS069H).	Validated for legacy programs with frozen BOMs; lacks updated ESD test data and minor timing refinements in SCBS069H.	Use only if backward compatibility with pre-2004 qualification records is contractually required.

Compared with 5962-9457702QLA, 5962-9457702Q3A offers enhanced mechanical ruggedness in LCCC form, while SNJ54ABT646AJT provides legacy-equivalent functionality with earlier revision traceability-neither requires PCB redesign, but Q3A enables better thermal performance in conduction-cooled assemblies.

Availability

5962-9457702QLA is available at Aetrix Electronics and suitable for avionics data bus interfaces, secure military communication backplanes, spacecraft onboard computer I/O hubs, and nuclear instrumentation control systems requiring stable component supply across extended temperature and radiation environments.

Supply support for 5962-9457702QLA 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 aerospace and defense qualification experience.

The ABT646A product line was designed for high-speed, radiation-tolerant bus management in mission-critical systems-emphasizing deterministic timing, Ioff safety, and MIL-PRF-38535 Class V compliance from wafer to final test.

FAQ

What is the operating temperature range of the 5962-9457702QLA?

The 5962-9457702QLA is rated for −55°C to 125°C operation and fully qualified per MIL-PRF-38535 Class V, making it suitable for extreme-environment applications including satellite payloads, jet engine controllers, and nuclear plant instrumentation. This range is validated across all electrical parameters in the SCBS069H datasheet.

Does the 5962-9457702QLA support partial-power-down mode?

Yes, the 5962-9457702QLA includes Ioff circuitry that disables outputs and limits reverse current to ±100 µA when VCC = 0 V. This feature is explicitly documented in the datasheet's "Ioff Supports Partial-Power-Down Mode Operation" section and enables safe hot-swap and power-gating in modular avionics systems.

What package type is used for the 5962-9457702QLA?

The 5962-9457702QLA uses a Ceramic Dual-In-Line Package (CDIP) with 24 leads, designated JT per TI's packaging documentation. Its mechanical drawing (MSSO002E) confirms 0.6-inch body width, hermetic seal capability, and compliance with MIL-STD-1835 GDIP3-T24 and JEDEC MO-058 AA standards.

How does the 5962-9457702QLA handle bus direction control?

The 5962-9457702QLA uses the DIR pin to determine data flow direction when OE is low: DIR = H enables A→B transfer; DIR = L enables B→A transfer. Direction is independent of clock edges and remains stable during register storage, allowing seamless switching between real-time and stored data paths.

Is the 5962-9457702QLA pin-compatible with commercial SN74ABT646A variants?

No-the 5962-9457702QLA uses a 24-pin CDIP (JT) package, while commercial SN74ABT646A variants use SOIC (DW), SSOP (DB), TSSOP (PW), or TVSOP (DGV) packages with different pinouts and thermal characteristics. Electrical functionality is identical, but PCB layout and thermal design must be revalidated for the JT package.

5962-9457702QLA 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:: -

5962-9457702QLA FAQ

1.How can I place an order for 5962-9457702QLA through Aetrix?

Please submit a Request for Quotation (RFQ) for 5962-9457702QLA 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 5962-9457702QLA reliable?

The price and inventory of 5962-9457702QLA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5962-9457702QLA is usually 5 days.

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4.How is shipping managed for 5962-9457702QLA?

5962-9457702QLA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5962-9457702QLA 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 5962-9457702QLA?

For technical support, including 5962-9457702QLA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5962-9457702QLA requirements.

6.How does Aetrix verify that 5962-9457702QLA is sourced from the original manufacturer or authorized distributors?

All 5962-9457702QLA 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 5962-9457702QLA meets industry standards.

7.What is the process for return or replacement of 5962-9457702QLA?

All 5962-9457702QLA units undergo pre-shipment inspection (PSI). If there is an issue with 5962-9457702QLA, 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 5962-9457702QLA part is unused and in its original packaging.

Return procedure for 5962-9457702QLA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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