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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 54LS |
| Packaging | | |
| Part Status | Active |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 1 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 1mA, 12mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | 14-CDIP (0.300", 7.62mm) |
| Supplier Device Package | 14-CDIP |
| ROHS |  |
The SN54LS125AJ is a quad non-inverting buffer from Texas Instruments' 54LS logic family. It features four independent channels with 3-State outputs, enabling connection to shared buses. Operating from a 4.5V to 5.5V supply, it provides 1mA source and 12mA sink current. Its ceramic DIP package and military temperature range make it suitable for rugged applications.
- 3-State Outputs: Allows multiple devices to share a bus without signal contention, simplifying system design.
- Wide Temperature Range: -55°C to 125°C operation ensures reliability in extreme environments.
- Low Power Consumption: 54LS family technology minimizes power draw, ideal for power-sensitive designs.
- Non-Inverting Logic: Preserves signal polarity, reducing design complexity.
Bus Line Driving
The 3-State outputs and 12mA sink capability make it ideal for driving bus lines in digital systems, allowing multiple devices to share a common data path without contention.
Memory Address Buffering
Use the SN54LS125AJ to buffer address lines between a CPU and memory array. The non-inverting nature preserves signal integrity, while 3-State outputs enable memory bank selection.
Signal Isolation
In mixed-signal boards, this buffer can isolate sensitive analog sections from digital noise. The high-impedance state effectively disconnects the load when not needed.
Peripheral Interface
Drive multiple peripheral inputs from a single source. The 1mA source current is sufficient for TTL-level inputs, ensuring reliable logic transitions.
Test Equipment Switching
In automated test equipment, the 3-State feature allows multiplexing test signals to different points on a unit under test, controlled by a simple enable signal.
Industrial Control Logic
With a wide -55°C to 125°C temperature range, it suits harsh industrial environments, buffering control signals between PLCs and field devices.
- Q: What logic family does the SN54LS125AJ belong to?
- A: It belongs to the 54LS logic family, known for low-power Schottky TTL technology.
- Q: What is the function of this IC?
- A: It is a quad (4-channel) non-inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 4 independent buffer channels.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for high-impedance states for bus-oriented applications.
- Q: What is the operating voltage range?
- A: It operates at a standard 5V TTL supply, specifically 4.5V to 5.5V.
- Q: What package is available?
- A: It comes in a 14-pin CDIP (Ceramic Dual In-line Package) with a 0.300" body width.
SN54LS125AJ.pdf
- Q: What logic family does the SN54LS125AJ belong to?
- A: It belongs to the 54LS logic family, known for low-power Schottky TTL technology.
- Q: What is the function of this IC?
- A: It is a quad (4-channel) non-inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 4 independent buffer channels.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for high-impedance states for bus-oriented applications.
- Q: What is the operating voltage range?
- A: It operates at a standard 5V TTL supply, specifically 4.5V to 5.5V.
- Q: What package is available?
- A: It comes in a 14-pin CDIP (Ceramic Dual In-line Package) with a 0.300" body width.