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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 54ABT |
| Packaging | | |
| Part 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 | 24mA, 48mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | 24-CDIP (0.300", 7.62mm) |
| Supplier Device Package | 24-CDIP |
| ROHS |  |
The SNJ54ABT646AJT is a high-performance octal transceiver from Texas Instruments, designed for bidirectional asynchronous communication between two data buses. Operating within a 4.5V to 5.5V supply range, it features non-inverting 3-State outputs and can sink up to 48mA, making it ideal for driving heavily loaded backplanes. Housed in a ceramic 24-pin CDIP, this device is specified for the -55°C to 125°C military temperature range, ensuring reliable operation in demanding environments. Its 54ABT logic family delivers a balance of speed and power efficiency, making it suitable for avionics, defense electronics, and high-reliability industrial control systems.
- High Output Drive (48mA Sink): Can drive low-impedance or high-capacitance loads, ensuring signal integrity on long bus traces.
- Military Temperature Range (-55°C to 125°C): Guarantees reliable operation in extreme thermal environments, critical for aerospace and defense.
- 3-State Outputs: Enables bus multiplexing and bidirectional data flow, allowing multiple devices to share a common data path.
- Ceramic CDIP Package: Provides superior hermetic sealing and mechanical robustness compared to plastic packages, enhancing long-term reliability.
High-Reliability Bus Interfacing
In aerospace and defense systems, the SNJ54ABT646AJT provides robust bidirectional data transfer between a microcontroller and peripheral modules. Its 3-State outputs and non-inverting architecture simplify bus isolation and direction control, while the military temperature range ensures operation in extreme environments.
Memory Address/Data Buffering
When driving large memory arrays, this transceiver buffers address and data lines, reducing capacitive loading on the memory controller. The 48mA sink capability at the output helps drive high-capacitance traces without signal degradation, improving system stability.
Industrial Control Backplane Communication
In industrial PLCs and control systems, the device can be used to interface multiple logic cards over a shared backplane. The 3-State outputs allow multiple cards to share the same data lines, with the transceiver enabling controlled read/write operations.
Redundant System Switching
For fault-tolerant systems, the SNJ54ABT646AJT can be used to switch between redundant bus paths. By controlling the output enable pins, a supervisory controller can isolate a faulty section and route data through a backup path, enhancing system availability.
Level-Shifting in Mixed-Voltage Systems
While operating at 5V, the device can interface with 3.3V logic if the input thresholds are compatible. This allows it to act as a buffer between 5V control logic and 3.3V peripheral devices, simplifying mixed-voltage system design.
- Q: What is the logic family of the SNJ54ABT646AJT?
- A: It belongs to the 54ABT logic family, designed for high-speed, low-power bus interface applications.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 8 channels, enabling bidirectional data flow between two buses.
- Q: What is the output type?
- A: It features 3-State outputs, allowing the device to be disconnected from the bus for multiplexing or bidirectional operation.
- Q: What is the operating voltage range?
- A: The recommended supply voltage range is 4.5V to 5.5V, making it suitable for standard 5V systems.
- Q: What is the package type?
- A: It is available in a 24-pin CDIP (Ceramic Dual In-line Package) with a 0.300-inch body width.
- Q: What is the operating temperature range?
- A: It is specified for the full military temperature range of -55°C to 125°C.
SNJ54ABT646AJT.pdf
- Q: What is the logic family of the SNJ54ABT646AJT?
- A: It belongs to the 54ABT logic family, designed for high-speed, low-power bus interface applications.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 8 channels, enabling bidirectional data flow between two buses.
- Q: What is the output type?
- A: It features 3-State outputs, allowing the device to be disconnected from the bus for multiplexing or bidirectional operation.
- Q: What is the operating voltage range?
- A: The recommended supply voltage range is 4.5V to 5.5V, making it suitable for standard 5V systems.
- Q: What is the package type?
- A: It is available in a 24-pin CDIP (Ceramic Dual In-line Package) with a 0.300-inch body width.
- Q: What is the operating temperature range?
- A: It is specified for the full military temperature range of -55°C to 125°C.