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| Product attributes | Property Value |
| Manufacturer | Motorola |
| 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 (0.154", 3.90mm Width) |
| Supplier Device Package | 14-SOIC |
The SN74LS125ADR2 from Motorola is a quad non-inverting buffer with 3-state outputs, part of the classic 74LS Low-power Schottky logic family. It operates at a standard 5V supply (4.75V to 5.25V), making it compatible with TTL logic systems. Each channel can source 2.6mA and sink 24mA, providing robust drive for bus lines and TTL loads. The 3-state outputs allow for bus multiplexing and isolation. Housed in a 14-pin SOIC package, it is designed for commercial applications with an operating temperature range of 0°C to 70°C.
- 3-State Outputs: Enables bus sharing and isolation in multi-device 5V systems.
- High 24mA Sink Current: Drives TTL loads and long bus lines effectively.
- Standard 5V Operation: Directly compatible with legacy TTL logic and 5V microcontrollers.
- Low-Power Schottky Technology: Provides a good balance of speed and power consumption for 5V designs.
Legacy 5V Bus Systems
Ideal for buffering data and address buses in legacy 5V microprocessor systems, ensuring signal integrity and providing the necessary drive current for multiple loads.
TTL-to-CMOS Interfacing
With its 5V operation and 3-state outputs, it can interface between TTL logic and CMOS logic, ensuring proper voltage levels and preventing damage to sensitive inputs.
Memory Expansion in Retro Computing
Use it to buffer address lines when expanding memory in vintage computers or hobbyist projects. The 3-state outputs allow for easy bank switching.
Peripheral Driver for 5V Logic
Drive multiple TTL inputs or small relays with its 24mA sink capability. The 3-state feature allows peripherals to be isolated from the bus when not in use.
Industrial Control Panels
Buffer signals from 5V PLCs or industrial controllers to various output modules. The wide operating temperature range (0°C to 70°C) suits typical indoor industrial environments.
Test Equipment and Instrumentation
Its 3-state outputs are useful in test benches for switching signals between different measurement points, enabling automated testing of multiple circuits.
- Q: What logic family does the SN74LS125ADR2 belong to?
- A: It is part of the 74LS (Low-power Schottky) family, known for its balance of speed and power consumption.
- Q: What is the function of this IC?
- A: It is a quad (4-channel) non-inverting buffer with 3-state outputs, designed for bus and line driving.
- Q: How many channels does it have?
- A: It contains four independent buffer channels, each with its own output enable input.
- Q: What is the output type?
- A: The outputs are 3-state, allowing them to be set to high, low, or high-impedance for bus sharing.
- Q: What is the operating voltage range?
- A: It operates at a standard 5V supply (4.75V to 5.25V), making it compatible with TTL logic.
- Q: What package is available?
- A: It comes in a 14-pin SOIC package with a 3.90mm width, suitable for surface-mount assembly.
SN74LS125ADR2.pdf
- Q: What logic family does the SN74LS125ADR2 belong to?
- A: It is part of the 74LS (Low-power Schottky) family, known for its balance of speed and power consumption.
- Q: What is the function of this IC?
- A: It is a quad (4-channel) non-inverting buffer with 3-state outputs, designed for bus and line driving.
- Q: How many channels does it have?
- A: It contains four independent buffer channels, each with its own output enable input.
- Q: What is the output type?
- A: The outputs are 3-state, allowing them to be set to high, low, or high-impedance for bus sharing.
- Q: What is the operating voltage range?
- A: It operates at a standard 5V supply (4.75V to 5.25V), making it compatible with TTL logic.
- Q: What package is available?
- A: It comes in a 14-pin SOIC package with a 3.90mm width, suitable for surface-mount assembly.