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| Product attributes | Property Value |
| Manufacturer | Fairchild Semiconductor |
| Product Series | 74LS |
| 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 | 2.6mA, 24mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 14-SOP |
The DM74LS125ASJX from Fairchild Semiconductor is a quad non-inverting buffer with 3-State outputs. Operating from 4.75V to 5.25V, it sources 2.6mA and sinks 24mA. This 74LS family device is TTL-compatible, making it ideal for legacy 5V systems. The 14-SOIC package is suitable for commercial applications with a 0°C to 70°C range. It is commonly used for bus interfacing, signal buffering, and driving moderate loads.
- High Sink Current (24mA): Drives LEDs, relays, and other loads directly.
- 3-State Outputs: Enables bus sharing in multiplexed systems.
- TTL-Compatible: Works seamlessly with existing 5V TTL logic.
- Quad Channel Design: Saves board space by integrating four buffers.
Legacy TTL Bus Systems
With 3-State outputs and 24mA sink capability, it buffers data buses in legacy 5V TTL systems.
Microprocessor Interface Buffering
Buffers address/data lines between microprocessors and memory or peripherals, ensuring signal integrity.
Peripheral Driver for LEDs
The high sink current (24mA) can directly drive LEDs or relays with proper current limiting.
Industrial Control Panels
Buffers control signals from PLCs to various actuators, providing isolation and drive strength.
Test Equipment Logic Distribution
Distributes test signals to multiple measurement points with 3-State control for selective enabling.
Networking Equipment
Buffers control signals in routers and switches, ensuring reliable operation in 5V logic sections.
- Q: What logic family does the DM74LS125ASJX use?
- A: It is from the 74LS family, a low-power Schottky TTL logic.
- Q: What is the function of this device?
- A: It is a non-inverting buffer with 4 channels, ideal for signal distribution.
- Q: What is the output type?
- A: It has 3-State outputs, allowing connection to shared buses.
- Q: What is the voltage range?
- A: It operates from 4.75V to 5.25V, standard for 5V TTL systems.
- Q: What are the output currents?
- A: It can source 2.6mA and sink 24mA, suitable for TTL loads.
- Q: What is the temperature range?
- A: It operates from 0°C to 70°C, for commercial applications.
DM74LS125ASJX.pdf
- Q: What logic family does the DM74LS125ASJX use?
- A: It is from the 74LS family, a low-power Schottky TTL logic.
- Q: What is the function of this device?
- A: It is a non-inverting buffer with 4 channels, ideal for signal distribution.
- Q: What is the output type?
- A: It has 3-State outputs, allowing connection to shared buses.
- Q: What is the voltage range?
- A: It operates from 4.75V to 5.25V, standard for 5V TTL systems.
- Q: What are the output currents?
- A: It can source 2.6mA and sink 24mA, suitable for TTL loads.
- Q: What is the temperature range?
- A: It operates from 0°C to 70°C, for commercial applications.