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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | 54LS |
| Packaging | Bulk | |
| 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 | Surface Mount |
| Package / Case | 14-CFlatPack |
| Supplier Device Package | 14-CFP |
The DM54LS125AW/883 from National Semiconductor is a quad non-inverting buffer with 3-State outputs, designed for high-reliability military and aerospace applications. It operates from 4.5V to 5.5V and features 1mA source / 12mA sink current capability, typical of LS TTL logic. The 14-CFlatPack package provides a hermetic seal for harsh environments, and the -55°C to 125°C temperature range ensures reliable operation. This buffer is ideal for bus driving, signal distribution, and redundant system switching in mission-critical systems.
- Military Temperature Range (-55°C to 125°C): Guarantees operation in extreme environments.
- Hermetic 14-CFlatPack Package: Provides superior protection against moisture and contaminants.
- 3-State Outputs: Enables bus sharing and redundant system design.
- Proven 54LS TTL Technology: Reliable, well-understood logic for legacy and high-reliability systems.
- Quad Buffer Configuration: Four independent buffers in one package, saving board space.
Military Avionics Bus Buffering
In avionics systems, the DM54LS125AW buffers data buses between flight control computers and sensors. The -55°C to 125°C range ensures operation in extreme conditions.
Space-Grade Signal Distribution
For satellite telemetry, this buffer can distribute timing or control signals to multiple subsystems. The 3-State outputs allow for redundant bus architectures.
High-Reliability Industrial Controls
In harsh industrial environments (e.g., oil & gas), this buffer provides robust signal conditioning for PLC I/O modules, withstanding wide temperature swings.
Legacy TTL System Interfacing
When interfacing legacy 5V TTL systems with newer components, this buffer ensures proper fan-out and drive capability, maintaining signal integrity.
Redundant System Switching
Use the 3-State outputs to switch between redundant logic paths in fail-safe systems. The enable pins allow seamless transition between active and standby modules.
Test and Measurement (Military)
In military test equipment, this buffer can route signals to different measurement instruments, providing reliable switching in demanding environments.
- Q: What is the logic family?
- A: This is a 54LS (Low-power Schottky) device, designed for military/aerospace applications with high reliability.
- Q: What is the function?
- A: It is a quad (4-channel) non-inverting buffer with 3-State outputs, used for signal buffering and bus driving.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, standard for TTL logic.
- Q: What is the output current?
- A: It can source 1mA and sink 12mA, providing asymmetric drive typical of LS TTL.
- Q: What is the temperature range?
- A: It operates over -55°C to 125°C, suitable for military environments.
- Q: What is the package?
- A: It comes in a 14-CFlatPack package, a hermetic flat package for high-reliability applications.
DM54LS125AW/883.pdf
- Q: What is the logic family?
- A: This is a 54LS (Low-power Schottky) device, designed for military/aerospace applications with high reliability.
- Q: What is the function?
- A: It is a quad (4-channel) non-inverting buffer with 3-State outputs, used for signal buffering and bus driving.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, standard for TTL logic.
- Q: What is the output current?
- A: It can source 1mA and sink 12mA, providing asymmetric drive typical of LS TTL.
- Q: What is the temperature range?
- A: It operates over -55°C to 125°C, suitable for military environments.
- Q: What is the package?
- A: It comes in a 14-CFlatPack package, a hermetic flat package for high-reliability applications.