My Inquiry
My Account
Texas Instruments SNJ54AS652W
- Part No.:
- SNJ54AS652W
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SNJ54AS652W.pdf
- Description:
- REGISTERED BUS TRANSCEIVER
- Quantity:
- Payment:
- Shipping:
Inventory:2,567
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SNJ54AS652W from Texas Instruments is a military-grade octal bus transceiver and register with true data path, 3-state outputs on both A and B buses, and independent clock, select, and output-enable controls. It operates across –55°C to 125°C, supports up to 90 MHz clock frequency, delivers 48 mA low-level output drive, and enables real-time or stored data multiplexing in dual-bus systems.
For engineers reviewing the SNJ54AS652W datasheet, SNJ54AS652W pinout, SNJ54AS652W application, or SNJ54AS652W equivalent, this device is selected for high-reliability bidirectional bus management in aerospace avionics, radiation-tolerant computing, and legacy military data acquisition systems requiring deterministic timing, register storage, and simultaneous A↔B bus control.
Technical Context
The SNJ54AS652W integrates eight D-type flip-flops with dual-clock (CLKAB/CLKBA), dual-select (SAB/SBA), and dual-output-enable (OEAB/OEBA) logic to support four distinct bus operations: isolation, real-time transfer (A↔B), storage from either bus, and concurrent stored-data routing. Its internal register architecture eliminates decoding glitches during mode transitions between real-time and stored data paths.
It implements true (non-inverting) data flow between A and B buses, unlike the inverting SNJ54AS651W. All eight channels operate synchronously under shared control signals but retain independent data latching capability-enabling selective storage of A or B bus data without affecting the other bus's state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL/AS logic rails and stable operation under military voltage tolerances. |
| Max Clock Frequency | 90 MHz - Enables high-speed synchronous data capture and register update in real-time control loops. |
| IOL (Low-Level Output) | 48 mA - Supports direct driving of heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay (tPLH) | 6 ns (min) / 30 ns (max) - Guarantees sub-30 ns worst-case latency for critical timing-critical bus arbitration. |
| Operating Temperature | –55°C to +125°C - Qualified for extended-range military applications including airborne and space-qualified electronics. |
| Output Type | 3-State on both A and B buses - Allows bidirectional bus sharing with zero contention risk when OEAB/OEBA are controlled independently. |
| Data Path Logic | True (non-inverting) - Preserves signal polarity end-to-end, eliminating need for external inversion in feedback or monitoring paths. |
Pinout & Package
SNJ54AS652W is housed in a 24-pin Ceramic Dual-In-Line Package (CDIP) with JT suffix, featuring hermetic sealing and gold-plated leads for MIL-STD-883 compliance. Pin numbering follows standard JT top-view orientation with GND at pin 12 and VCC at pin 13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | CLKAB / CLKBA | Asynchronous clocks for loading A→register and B→register respectively; edge-triggered on rising edge. |
| 2, 23 | SAB / SBA | Select controls: low = real-time transfer, high = stored-data transfer; glitch-free internal decoding. |
| 3, 22 | OEAB / OEBA | Independent 3-state enables for A and B bus outputs; high = high-impedance, low = active drive. |
| 4–11 | A1–A8 | Octal bidirectional I/O pins for Bus A; function as input or 3-state output depending on OEAB/SAB state. |
| 14–21 | B1–B8 | Octal bidirectional I/O pins for Bus B; function as input or 3-state output depending on OEBA/SBA state. |
| 12 | GND | Power ground reference for all internal logic and output drivers. |
| 13 | VCC | +5 V supply rail; decoupling required per MIL-PRF-38535 layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| True Data Path | Preserves signal polarity across A↔B transfers-critical for closed-loop feedback integrity and diagnostic traceability. |
| Dual Independent Registers | Enables concurrent storage of A-bus and B-bus data without cross-talk, supporting time-stamped dual-channel acquisition. |
| Glitch-Free Select Control | Eliminates metastability during SAB/SBA transitions-ensures deterministic behavior in hard real-time bus arbitration. |
| MIL-STD-883 Qualified | Meets screening, testing, and reliability requirements for Class B military applications including TQFP replacement in legacy systems. |
| 48 mA Output Drive | Drives up to 20 standard TTL loads directly-reduces component count in high-fanout backplane interfaces. |
Applications
| Avionics Data Bus Interface | Secure Military Communication Node |
|---|---|
Use Scenario: Interfacing flight control sensor data (A bus) with mission computer processing (B bus) in F-16 digital flight control units. IC Role / Device Role / Timing Role: Bidirectional bus transceiver with register storage for timestamped sensor snapshot capture and deterministic command replay. Use Value: Enables synchronized A/B bus handshaking at 90 MHz while preserving signal polarity for fault-isolation diagnostics. | Use Scenario: Secure encrypted data exchange between crypto module (A bus) and radio baseband processor (B bus) in SINCGARS radios. IC Role / Device Role / Timing Role: Isolates buses during encryption key loading, then enables real-time or stored payload transfer based on security state. Use Value: Prevents bus contention during key rotation and ensures glitch-free mode switching under EMI stress. |
| Rad-Hard Telemetry Controller | Legacy Weapon System Bus Bridge |
Use Scenario: Managing telemetry downlink (A bus) and command uplink (B bus) in radiation-hardened satellite subsystems. IC Role / Device Role / Timing Role: Stores telemetry frames during burst transmission windows and replays them on demand via SAB/SBA control. Use Value: Provides deterministic 32-bit frame buffering without external RAM-reducing single-event latchup risk. | Use Scenario: Bridging MIL-STD-1553B interface (A bus) with legacy 8086-based weapon control CPU (B bus) in M1 Abrams fire control upgrades. IC Role / Device Role / Timing Role: Translates asynchronous command packets into synchronous register-stored bursts compatible with 8086 wait-state timing. Use Value: Eliminates need for custom FPGA glue logic by providing native register staging and 3-state bus arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver and register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ALS652JT | ALS logic family: lower speed (35 MHz max), lower drive (24 mA IOL), higher noise immunity, slower propagation delays. | Preferred for lower-power, lower-speed military systems where EMI resilience outweighs speed requirements. | Select when power budget is constrained and 90 MHz operation is unnecessary; verify timing margins for existing clock tree. |
| SN74AS652DW | Commercial-grade AS variant in SOIC-DW package; same 90 MHz speed and 48 mA drive, but rated 0°C to 70°C only. | Used in non-military industrial controllers, test equipment, and commercial avionics where extended temperature range is not required. | Choose for cost-sensitive volume production where hermetic CDIP packaging and MIL-STD-883 qualification are not mandated. |
Compared with SNJ54ALS652JT and SN74AS652DW, the SNJ54AS652W uniquely combines military temperature range, radiation-tolerant packaging, and AS-family speed/drive-making it irreplaceable in high-integrity, high-speed, extended-environment embedded systems.
Availability
SNJ54AS652W is available at Aetrix Electronics and suitable for avionics data bus interfaces, secure military communication nodes, rad-hard telemetry controllers, and legacy weapon system bus bridges requiring stable component supply across long product lifecycles.
Supply support for SNJ54AS652W 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 leader specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.
The SNJ54AS652W belongs to TI's military logic portfolio designed specifically for deterministic, high-speed, dual-bus data management in safety-critical systems where register storage, glitch-free control, and extended environmental operation are mandatory.
FAQ
What is the maximum operating frequency of the SNJ54AS652W?
The SNJ54AS652W supports a maximum clock frequency of 90 MHz under recommended operating conditions (VCC = 4.5 V to 5.5 V, TA = –55°C to +125°C). This rating is validated per MIL-PRF-38535 characterization and applies to both CLKAB and CLKBA inputs for reliable register loading and bus transfer timing.
Does the SNJ54AS652W support inverting or true data path functionality?
The SNJ54AS652W implements a true (non-inverting) data path between A and B buses, as confirmed in the device function table and logic symbol documentation. Unlike the SNJ54AS651W, it does not invert data during real-time or stored transfers-preserving signal polarity for diagnostic accuracy and closed-loop integrity.
What package type and pin count does the SNJ54AS652W use?
The SNJ54AS652W is packaged in a 24-pin Ceramic Dual-In-Line Package (CDIP) with JT suffix, conforming to MIL-STD-1835. It features hermetic sealing, gold-plated leads, and pin 12 as GND and pin 13 as VCC-matching the standard JT top-view pinout shown in the SDAS066G datasheet.
Can the SNJ54AS652W operate with 3.3 V supply voltage?
No, the SNJ54AS652W requires a minimum supply voltage of 4.5 V and is specified only for operation within 4.5 V to 5.5 V. It is not 3.3 V compatible; using 3.3 V will result in undefined logic states, insufficient output drive, and potential functional failure per absolute maximum ratings.
How does the SNJ54AS652W handle simultaneous storage of data from both A and B buses?
The SNJ54AS652W supports simultaneous storage of A and B bus data via concurrent low-to-high transitions on CLKAB and CLKBA, provided SAB and SBA are both held low (real-time mode). This allows atomic capture of dual-channel sensor data without inter-bus dependency or timing skew.
SNJ54AS652W 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:
- -
SNJ54AS652W FAQ
1.How can I place an order for SNJ54AS652W through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54AS652W 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 SNJ54AS652W reliable?
The price and inventory of SNJ54AS652W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54AS652W is usually 5 days.
3.What payment methods are accepted for SNJ54AS652W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54AS652W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54AS652W?
SNJ54AS652W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54AS652W 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 SNJ54AS652W?
For technical support, including SNJ54AS652W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54AS652W requirements.
6.How does Aetrix verify that SNJ54AS652W is sourced from the original manufacturer or authorized distributors?
All SNJ54AS652W 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 SNJ54AS652W meets industry standards.
7.What is the process for return or replacement of SNJ54AS652W?
All SNJ54AS652W units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54AS652W, 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 SNJ54AS652W part is unused and in its original packaging.
Return procedure for SNJ54AS652W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SNJ54AS652W Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
