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Texas Instruments SNJ54BCT543JT
- Part No.:
- SNJ54BCT543JT
- Manufacturer:
- Texas Instruments
- Package:
- 24-CDIP (0.300", 7.62mm)
- Datasheet:
-
SNJ54BCT543JT.pdf
- Description:
- OCTAL REGISTERED TRANSCEIVERS WI
- Quantity:
- Payment:
- Shipping:
Inventory:3,078
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Product details
Overview
SNJ54BCT543JT from Texas Instruments is a military-grade octal transceiver with dual-directional latch-controlled data flow, 3-state true outputs, BiCMOS logic architecture, and operation across −55°C to 125°C. It features independent A-to-B and B-to-A control via CEAB/CEBA, LEAB/LEBA, and OEAB/OEBA inputs, enabling bidirectional bus interfacing in avionics and ruggedized computing systems.
For engineers reviewing the SNJ54BCT543JT datasheet, SNJ54BCT543JT pinout, SNJ54BCT543JT application, or SNJ54BCT543JT equivalent, key selection criteria include its 24-pin ceramic DIP (JT) package, 5 V ±10% supply tolerance, 8-bit latch storage per direction, 7 ns minimum LE pulse width, and −55°C to 125°C operating range for high-reliability embedded timing and control paths.
Technical Context
The SNJ54BCT543JT implements two independent sets of D-type latches-one for A-to-B and one for B-to-A data flow-each with dedicated latch-enable (LEAB/LEBA) and output-enable (OEAB/OEBA) controls. Its BiCMOS design reduces ICCZ standby current to 9–15 mA while supporting 48 mA low-level output drive at VCC = 4.5 V.
Control logic requires CEAB low to enable A-to-B path and CEBA low for B-to-A path; latching occurs on LEAB/LEBA rising edge after data setup (4.5 ns min), and 3-state outputs are activated only when both CE and OE are low. Timing parameters are fully characterized over the full military temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS systems and accommodates rail tolerance in harsh environments. |
| Operating Temperature | −55°C to 125°C - qualified for military/aerospace applications requiring extended thermal resilience without derating. |
| Output Drive (IOL) | 48 mA - supports direct interface to multiple TTL loads or legacy bus stubs without external buffering. |
| Propagation Delay (tPLH/tPHL) | 2 ns to 9.9 ns - enables sub-100 MHz synchronous bus operation with deterministic timing margins. |
| Input Clamp Current | −18 mA - provides robust ESD immunity per MIL-STD-883C Method 3015 (>2000 V HBM). |
| ICCZ Standby Current | 9–15 mA - BiCMOS optimization reduces quiescent power vs. bipolar-only equivalents during 3-state hold. |
| Pin Count & Package | 24-pin CDIP (JT) - hermetically sealable ceramic dual-in-line package for moisture- and radiation-sensitive deployments. |
Pinout & Package
Ceramic Dual-In-Line Package (CDIP), 24-lead, JT designation per MIL-STD-1835 GDIP3-T24 and JEDEC MO-058 AA. Hermetic ceramic body with glass-sealed leads; index point on cap for terminal identification; compatible with wave and reflow soldering (SNPB finish, no MSL rating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | Unidirectional data inputs to A-side latches; driven by upstream source during A-to-B transfer. |
| 11, 12, 13, 14, 15, 16, 17, 18 | B1–B8 Outputs | 3-state buffered outputs reflecting A-latch contents when CEAB and OEAB are low. |
| 9, 10, 23, 24 | LEBA, OEBA, LEAB, OEAB | Independent latch/output enables per direction; decouples timing control between A↔B paths. |
| 19, 20 | CEAB, CEBA | Chip-enable gates: CEAB low enables A-to-B path; CEBA low enables B-to-A path. |
| 21, 22 | GND, VCC | Single 5 V supply rail and ground reference; BiCMOS design minimizes supply noise sensitivity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent latch paths | Enables concurrent A→B and B→A data staging without bus contention or arbitration logic. |
| BiCMOS process technology | Reduces ICCZ to 9–15 mA versus bipolar-only equivalents, lowering system-level heat dissipation. |
| MIL-STD-883C ESD rating | Exceeds 2000 V HBM - eliminates need for external TVS diodes in controlled-environment avionics bays. |
| Back-to-back register architecture | Supports pipeline-style data handshaking across asynchronous subsystem boundaries (e.g., CPU ↔ I/O controller). |
| 3-state true outputs | Ensures clean bus release with no leakage or shoot-through during direction switching. |
Applications
| Avionics Data Bus Interface | Tactical Vehicle Control System |
|---|---|
Use Scenario: Bidirectional communication between flight computer and sensor acquisition module over shared 8-bit parallel bus under vibration and thermal cycling. IC Role / Device Role / Timing Role: Octal transceiver providing isolated, latch-synchronized data handoff with independent enable control per direction. Use Value: Eliminates need for discrete direction-control logic and level shifters while maintaining MIL-STD-883C reliability across −55°C to 125°C. | Use Scenario: Interfacing armored vehicle's engine control unit (ECU) with mission-critical display processor using legacy parallel video/data link. IC Role / Device Role / Timing Role: Latched bus transceiver managing time-critical command/response cycles with deterministic 7 ns LE pulse width. Use Value: Enables deterministic 48 mA drive into long cable runs without signal degradation or timing skew. |
| Secure Communications Crypto Module | Ruggedized Industrial PLC Backplane |
Use Scenario: Secure key exchange between cryptographic processor and tamper-detection sensor array in sealed enclosure. IC Role / Device Role / Timing Role: Isolated bidirectional data conduit with hardware-enforced direction gating via CEAB/CEBA. Use Value: Prevents unintended data leakage during power-up/down sequences due to strict enable hierarchy and 3-state isolation. | Use Scenario: Modular I/O expansion backplane where CPU card communicates with analog/digital I/O cards over shared 8-bit data bus. IC Role / Device Role / Timing Role: Bus transceiver with latch storage enabling asynchronous read/write handshaking between mismatched clock domains. Use Value: Supports hot-swap-capable backplane designs via robust 2000 V ESD protection and hermetic JT package sealing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54BCT541JT | Octal buffer (non-latched, unidirectional); no B-to-A path or LE inputs. | Suitable only for fixed-direction bus driving; lacks bidirectional storage capability. | Select when direction is static and latch timing control is unnecessary. |
| SNJ54ACT543FK | Advanced CMOS version; 28-pin LCCC; lower ICCZ (2 mA), higher speed (tPLH = 4.5 ns), but reduced drive (24 mA). | Preferred for low-power, high-speed digital subsystems where 48 mA drive is not required. | Choose for newer designs prioritizing power efficiency over legacy drive strength. |
Compared with SNJ54BCT543JT, SNJ54BCT541JT omits bidirectional latching and is limited to unidirectional use, while SNJ54ACT543FK trades drive strength and package compatibility for lower power and faster propagation-making SNJ54BCT543JT optimal for legacy-mandated 48 mA drive and JT-package integration.
Availability
SNJ54BCT543JT is available at Aetrix Electronics and suitable for avionics data bus interfaces, tactical vehicle control systems, secure communications crypto modules, and ruggedized industrial PLC backplanes requiring stable component supply across extended temperature and lifecycle demands.
Supply support for SNJ54BCT543JT 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 company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.
The SN54BCT series was developed for military and space applications requiring guaranteed operation across −55°C to 125°C, with BiCMOS process technology delivering TTL-compatible performance and reduced power consumption versus legacy bipolar designs.
FAQ
What is the maximum operating temperature range for SNJ54BCT543JT?
The SNJ54BCT543JT is characterized for continuous operation from −55°C to 125°C, meeting MIL-STD-883C requirements for military-grade environmental resilience. This range is verified across all electrical parameters including propagation delay, output drive, and input thresholds, making SNJ54BCT543JT suitable for deployment in jet engine bays, missile guidance sections, and other thermally extreme subsystems.
Does SNJ54BCT543JT support true 3-state outputs on both A and B ports?
No - SNJ54BCT543JT provides true 3-state outputs only on the B port (pins 11–18). The A port (pins 1–8) functions exclusively as inputs in A-to-B mode or outputs in B-to-A mode, but does not offer 3-state control. Output enable for B-side is managed independently via OEAB and OEBA, ensuring precise bus release timing without contention during direction transitions of SNJ54BCT543JT.
What package type and lead finish does SNJ54BCT543JT use?
SNJ54BCT543JT uses a 24-lead ceramic dual-in-line package (CDIP) designated JT, with tin-lead (SNPB) lead finish. It is hermetically sealable per MIL-STD-1835 GDIP3-T24 and JEDEC MO-058 AA, and carries no moisture sensitivity level (MSL) rating due to its ceramic construction. The SNJ54BCT543JT package is designed for wave soldering and high-reliability board assembly in defense and aerospace applications.
Can SNJ54BCT543JT operate with a 3.3 V supply?
No - SNJ54BCT543JT is specified only for 4.5 V to 5.5 V operation per its recommended operating conditions. Attempting 3.3 V operation violates the absolute maximum rating for VCC (−0.5 V to 7 V) and will result in undefined logic states, excessive propagation delay, and potential failure to meet latch setup/hold timing. For 3.3 V systems, consider SN74LVC543 or similar LVCMOS alternatives instead of SNJ54BCT543JT.
How many independent enable controls does SNJ54BCT543JT provide for bidirectional operation?
SNJ54BCT543JT provides six independent enable controls: CEAB and CEBA (chip enables), LEAB and LEBA (latch enables), and OEAB and OEBA (output enables). Each pair governs one direction (A-to-B or B-to-A), allowing fully asynchronous, non-blocking bidirectional data flow. This architecture eliminates bus turnaround delays and enables simultaneous preparation of next-cycle data while current-cycle data is being output - a critical capability in real-time SNJ54BCT543JT deployments.
SNJ54BCT543JT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54BCT
- Package/Case:
- 24-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-CDIP
SNJ54BCT543JT FAQ
1.How can I place an order for SNJ54BCT543JT through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54BCT543JT 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 SNJ54BCT543JT reliable?
The price and inventory of SNJ54BCT543JT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54BCT543JT is usually 5 days.
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SNJ54BCT543JT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54BCT543JT 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 SNJ54BCT543JT?
For technical support, including SNJ54BCT543JT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54BCT543JT requirements.
6.How does Aetrix verify that SNJ54BCT543JT is sourced from the original manufacturer or authorized distributors?
All SNJ54BCT543JT 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 SNJ54BCT543JT meets industry standards.
7.What is the process for return or replacement of SNJ54BCT543JT?
All SNJ54BCT543JT units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54BCT543JT, 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 SNJ54BCT543JT part is unused and in its original packaging.
Return procedure for SNJ54BCT543JT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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