My Inquiry
My Account
Texas Instruments SNJ54ABT245AJ
- Part No.:
- SNJ54ABT245AJ
- Manufacturer:
- Texas Instruments
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
SNJ54ABT245AJ.pdf
- Description:
- 54ABT245A OCTAL BUS TRANSCEIVERS
- Quantity:
- Payment:
- Shipping:
Inventory:1,056
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SNJ54ABT245AJ from Texas Instruments is a military-grade octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data transfer between A and B buses in high-reliability systems. It operates across −55°C to 125°C, delivers ±32-mA high-drive outputs (IOH/−IOL), supports hot insertion via Ioff and power-up 3-state, and features <1-V output ground bounce at 5 V.
For engineers reviewing the SNJ54ABT245AJ datasheet, SNJ54ABT245AJ pinout, SNJ54ABT245AJ application, or SNJ54ABT245AJ equivalent, key selection criteria include its CDIP-20 package, MIL-PRF-38535 compliance, −55°C to 125°C operating range, and guaranteed hot-insertion support without external circuitry.
Technical Context
The SNJ54ABT245AJ implements dual 8-bit bidirectional data paths controlled by DIR (direction) and OE (output enable) inputs. Its logic-level translation is unidirectional per direction setting: when DIR = L, data flows B→A; when DIR = H, data flows A→B; OE = H forces all outputs into high-impedance isolation.
It integrates Ioff circuitry that disables outputs during power-down to prevent backflow current, and power-up 3-state logic that holds outputs high-Z during VCC ramp-up/down-enabling safe live insertion into powered backplanes or hot-swap subsystems without bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with legacy 5-V TTL and CMOS systems while maintaining noise margin. |
| Output Drive | −32 mA IOH / +64 mA IOL - enables direct driving of heavy capacitive loads or multiple TTL inputs without buffers. |
| Propagation Delay | 1 ns to 3.9 ns (tPLH/tPHL) - supports high-speed bus handshaking up to ~250 MHz clock-equivalent rates. |
| Hot-Insertion Support | Ioff ≤ ±100 µA at VCC = 0 - guarantees no damaging current flow when device is inserted into live 5-V bus. |
| Operating Temperature | −55°C to 125°C - qualified for aerospace, defense, and downhole industrial environments per MIL-PRF-38535. |
| ESD Protection | 2000-V HBM, 200-V MM - exceeds JEDEC JESD22-A114/A115, reducing field failure risk in handling and assembly. |
| Latch-Up Immunity | >500 mA per JESD17 - prevents destructive latch-up under transient overvoltage or supply sequencing faults. |
Pinout & Package
SNJ54ABT245AJ is housed in a 20-pin Ceramic Dual In-line Package (CDIP-J), hermetically sealed for moisture resistance and thermal stability in extended temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs/Outputs | Port A bidirectional data lines; connected to one bus segment and driven or received based on DIR/OE state. |
| 11, 12, 13, 14, 15, 16, 17, 18 | B1–B8 Inputs/Outputs | Port B bidirectional data lines; connected to second bus segment and directionally coupled to A port. |
| 9 | DIR | Direction control input: low = B→A, high = A→B; TTL-compatible threshold (VIL ≤ 0.8 V, VIH ≥ 2 V). |
| 10 | OE | Output enable input: low = enabled, high = 3-state isolation; active-low logic with pullup recommended for hot-insertion safety. |
| 20 | VCC | Positive supply pin (4.5–5.5 V); requires local 0.1-µF ceramic decoupling adjacent to pin. |
| 19 | GND | Signal ground reference; must be low-inductance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | −32 mA IOH / +64 mA IOL enables direct interface to 10+ standard TTL loads or long PCB traces without signal degradation. |
| Power-Up 3-State | Guaranteed high-impedance outputs during VCC ramp-up/down eliminates bus conflicts in multi-device hot-swap systems. |
| Ioff Protection | Active output disable at VCC = 0 prevents backflow current from live bus into unpowered device-critical for MIL-STD-1553 or ARINC-429 backplane integrity. |
| Low Ground Bounce | VOLP < 1 V at 5 V/25°C reduces simultaneous switching noise, improving signal integrity in dense digital systems. |
| MIL-PRF-38535 Compliance | Full screening per Class B or S levels ensures reliability in mission-critical avionics, radar, and spaceflight electronics. |
Applications
| Avionics Data Bus Interface | Military Vehicle Control System |
|---|---|
Use Scenario: Isolating and translating data between dissimilar avionics subsystems (e.g., flight computer ↔ sensor interface unit) on a shared MIL-STD-1553B backbone. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver enabling synchronous command/response exchange with deterministic latency ≤3.9 ns. Use Value: Eliminates need for discrete buffer arrays while ensuring hot-swap capability during in-flight maintenance and meeting DO-254 design assurance requirements. | Use Scenario: Interfacing ruggedized display controller with vehicle CAN gateway and weapon subsystem processors in armored combat vehicles. IC Role / Device Role / Timing Role: Octal bus isolator managing data flow direction between isolated 5-V domains during engine start-up transients. Use Value: Prevents latch-up and bus contention during 12-V battery dip events due to Ioff and power-up 3-state behavior. |
| Secure Communications Crypto Module | Satellite Payload Command Decoder |
Use Scenario: Enabling secure, tamper-resistant data routing between FPGA-based encryption engines and RF modems in classified comms hardware. IC Role / Device Role / Timing Role: Radiation-tolerant bus transceiver providing bidirectional data path with guaranteed high-Z during power cycling of crypto ICs. Use Value: Supports TEMPEST-compliant isolation and meets MIL-PRF-38535 Class S screening for anti-tamper integrity. | Use Scenario: Routing telemetry and command signals between radiation-hardened microcontroller and payload sensors in low-earth orbit satellites. IC Role / Device Role / Timing Role: High-reliability bus coupler synchronizing time-critical housekeeping data transfers with sub-5-ns timing uncertainty. Use Value: Delivers latch-up immunity >500 mA and ESD robustness essential for single-event effect (SEE) mitigation in space environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ABT245AFK | LCCC-20 package; lower thermal resistance (θJA ≈ 40°C/W vs. CDIP's 69°C/W); same electrical specs and MIL-PRF-38535 qualification. | Better suited for conduction-cooled modules or high-power-density boards where surface-mount thermal management is critical. | Select SNJ54ABT245AFK when board space is constrained and thermal performance outweighs through-hole mounting preference. |
| 5962-9214802QRA | Identical CDIP-20 mechanical form and pinout; identical electrical specs; same −55°C to 125°C range and MIL-PRF-38535 Class B screening. | No functional difference; alternate orderable part number issued under different DSCC drawing revision. | 5962-9214802QRA is a direct replacement with identical fit, form, and function-ideal for logistics continuity in DoD procurement. |
Compared with SNJ54ABT245AFK and 5962-9214802QRA, SNJ54ABT245AJ offers identical military-grade functionality in the standard CDIP package, with proven long-term availability for legacy avionics sustainment and simplified through-hole assembly versus LCCC or newer QML-qualified variants.
Availability
SNJ54ABT245AJ is available at Aetrix Electronics and suitable for avionics data bus interface, military vehicle control system, secure communications crypto module, and satellite payload command decoder applications requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SNJ54ABT245AJ 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and aerospace markets.
The SNJ54ABT245AJ belongs to TI's military-grade ABT logic family, engineered specifically for high-speed, hot-pluggable bus interfacing in defense and space systems where reliability, temperature resilience, and latch-up immunity are non-negotiable.
FAQ
What is the maximum operating temperature range for SNJ54ABT245AJ?
The SNJ54ABT245AJ is fully specified from −55°C to +125°C and qualified per MIL-PRF-38535 for extended temperature operation in aerospace, defense, and downhole applications. This range is validated across all electrical parameters including propagation delay, drive strength, and Ioff leakage-no derating required within this span.
Does SNJ54ABT245AJ support hot insertion, and how is it implemented?
Yes, SNJ54ABT245AJ supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, limiting backflow current to ±100 µA, and power-up 3-state logic forces outputs into high-impedance during VCC ramp-up/down. These functions are inherent to the silicon design and require no external components to achieve safe live insertion.
What package type is used for SNJ54ABT245AJ, and what are its key mechanical attributes?
SNJ54ABT245AJ uses a 20-pin Ceramic Dual In-line Package (CDIP-J) with 0.3-inch body width, 0.1-inch lead pitch, and hermetic ceramic construction. It features tin-lead (SNPB) lead finish, N/A MSL rating (not moisture-sensitive), and is designed for through-hole mounting with robust thermal and mechanical stability across −65°C to +150°C storage range.
How does the direction control (DIR) and output enable (OE) logic work on SNJ54ABT245AJ?
On SNJ54ABT245AJ, DIR determines data flow direction: DIR = low enables B→A transfer; DIR = high enables A→B transfer. OE controls output state: OE = low enables drivers; OE = high places all A and B pins in high-impedance isolation. Both inputs are TTL-compatible with VIL ≤ 0.8 V and VIH ≥ 2 V, and OE should be pulled up to VCC for hot-insertion safety.
Is SNJ54ABT245AJ pin-compatible with commercial SN74ABT245B variants?
No-SNJ54ABT245AJ (CDIP-J) shares identical pinout and logic function with SN74ABT245B in J-package, but differs electrically and mechanically from SOIC (DW), SSOP (DB), TSSOP (PW), and QFN (RGY) variants. Only CDIP-packaged SN74ABT245BN and SNJ54ABT245AJ share full pin, function, and footprint compatibility; other packages have distinct pin assignments and thermal characteristics.
SNJ54ABT245AJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
SNJ54ABT245AJ FAQ
1.How can I place an order for SNJ54ABT245AJ through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54ABT245AJ 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 SNJ54ABT245AJ reliable?
The price and inventory of SNJ54ABT245AJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54ABT245AJ is usually 5 days.
3.What payment methods are accepted for SNJ54ABT245AJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54ABT245AJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54ABT245AJ?
SNJ54ABT245AJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54ABT245AJ 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 SNJ54ABT245AJ?
For technical support, including SNJ54ABT245AJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54ABT245AJ requirements.
6.How does Aetrix verify that SNJ54ABT245AJ is sourced from the original manufacturer or authorized distributors?
All SNJ54ABT245AJ 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 SNJ54ABT245AJ meets industry standards.
7.What is the process for return or replacement of SNJ54ABT245AJ?
All SNJ54ABT245AJ units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54ABT245AJ, 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 SNJ54ABT245AJ part is unused and in its original packaging.
Return procedure for SNJ54ABT245AJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SNJ54ABT245AJ 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…
