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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 54AS |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| 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 |
| Package / Case | 20-CDIP (0.300", 7.62mm) |
| Supplier Device Package | 20-CDIP |
The SNJ54AS240AJ is a high-speed dual inverting buffer from Texas Instruments, part of the 54AS logic family. It features two independent channels with 3-State outputs, capable of sinking 48mA and sourcing 12mA. Operating from a 4.5V to 5.5V supply, it is designed for 5V TTL systems requiring robust bus isolation. The ceramic 20-CDIP package supports -55°C to 125°C operation, making it suitable for military and industrial environments. Typical applications include memory buffering, bus driving, and signal inversion in high-reliability systems.
- High Output Drive (48mA Sink): Drives heavy capacitive loads and long bus lines without signal degradation.
- 3-State Outputs: Enables multiple devices to share a common bus safely, preventing data corruption.
- Wide Temperature Range (-55°C to 125°C): Reliable operation in extreme military and aerospace environments.
- Ceramic CDIP Package: Provides superior thermal and mechanical stability compared to plastic packages.
High-Speed Bus Interfacing
The inverting buffer with 3-State outputs is ideal for isolating and driving high-speed data buses in mainframe and telecom systems, ensuring signal integrity at 5V TTL levels.
Memory Address Buffering
Use the SNJ54AS240AJ to buffer address lines between a CPU and SRAM/DRAM arrays. The 48mA sink current handles capacitive loads, reducing propagation delays in critical paths.
Military & Aerospace Signal Conditioning
With a -55°C to 125°C temperature range and ceramic CDIP package, this IC is suited for avionics and defense electronics requiring rugged, high-reliability signal buffering.
Industrial Control Logic Inversion
In PLC and motor control units, the inverting function simplifies logic design when active-low signals are needed, while 3-State outputs allow multiplexing of sensor inputs.
Test Equipment Channel Isolation
In automated test equipment, the 3-State feature enables multiple instruments to share a common bus without contention, with the 12mA source capability driving logic analyzers.
Redundant System Switching
For fault-tolerant systems, the 3-State outputs allow seamless switching between redundant controller boards, preventing bus conflicts during hot-swap operations.
- Q: What is the logic family of the SNJ54AS240AJ?
- A: It belongs to the 54AS logic family, designed for high-speed bipolar applications.
- Q: What is the function of this IC?
- A: It is a dual inverting buffer with 3-State outputs, ideal for bus-oriented systems.
- Q: How many channels does it have?
- A: It contains 2 independent buffer channels, each with a 3-State output.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it suitable for standard 5V logic systems.
- Q: What is the output type?
- A: The outputs are 3-State, allowing connection to shared buses with high-impedance control.
- Q: What package is available?
- A: It comes in a 20-CDIP (0.300", 7.62mm) ceramic dual-inline package.
SNJ54AS240AJ.pdf
- Q: What is the logic family of the SNJ54AS240AJ?
- A: It belongs to the 54AS logic family, designed for high-speed bipolar applications.
- Q: What is the function of this IC?
- A: It is a dual inverting buffer with 3-State outputs, ideal for bus-oriented systems.
- Q: How many channels does it have?
- A: It contains 2 independent buffer channels, each with a 3-State output.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it suitable for standard 5V logic systems.
- Q: What is the output type?
- A: The outputs are 3-State, allowing connection to shared buses with high-impedance control.
- Q: What package is available?
- A: It comes in a 20-CDIP (0.300", 7.62mm) ceramic dual-inline package.