Overview
The SN74ABT125, produced by Texas Instruments, is a quadruple bus buffer gate with 3-state outputs. This device is designed to operate in a wide range of applications, including hot-insertion scenarios, due to its Ioff and power-up 3-state capabilities. The SN74ABT125 supports independent line drivers, each with 3-state outputs, which can be placed in a high-impedance state during power-up and power-down to prevent driver conflicts. This feature is particularly useful in systems where multiple devices need to share the same bus.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage Range (VCC) | -0.5 | 7.0 | V |
| Input Voltage Range (VI) | -0.5 | 7.0 | V |
| Output Voltage Range (VO) in High or Power-Off State | -0.5 | 5.5 | V |
| Operating Free-Air Temperature (TA) | -55 | 125 | °C |
| High-Level Input Voltage (VIH) | 2.0 | V | |
| Low-Level Input Voltage (VIL) | 0.8 | V | |
| High-Level Output Current (IOH) | -24 | -32 | mA |
| Low-Level Output Current (IOL) | 48 | 64 | mA |
| Input Transition Rise or Fall Rate | 10 | ns/V |
Key Features
- Independent line drivers with 3-state outputs, allowing for high-impedance state during power-up and power-down to prevent driver conflicts.
- Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down.
- Supports hot-insertion applications.
- Wide operating temperature range from -55°C to 125°C.
- High-level output current capability up to -32 mA and low-level output current capability up to 64 mA.
- Input transition rise or fall rate of 10 ns/V.
Applications
- Hot-insertion applications where devices need to be added or removed without powering down the system.
- Bus systems where multiple devices share the same bus and need to be isolated during power cycles.
- Industrial and automotive systems requiring robust and reliable bus buffering.
- Personal computers and other electronic devices that require stable and controlled bus operations.
Q & A
- What is the primary function of the SN74ABT125?
The SN74ABT125 is a quadruple bus buffer gate with 3-state outputs, designed to buffer and drive signals while allowing for hot-insertion and power-up/power-down control.
- What is the operating temperature range of the SN74ABT125?
The operating temperature range is from -55°C to 125°C.
- What is the purpose of the Ioff circuitry in the SN74ABT125?
The Ioff circuitry disables the outputs to prevent damaging current backflow through the devices when they are powered down.
- How do the 3-state outputs of the SN74ABT125 work?
The 3-state outputs can be placed in a high-impedance state during power-up and power-down to prevent driver conflicts.
- What are the typical applications of the SN74ABT125?
Typical applications include hot-insertion scenarios, bus systems, industrial and automotive systems, and personal computers.
- What is the recommended power-up ramp rate for the SN74ABT125?
The recommended power-up ramp rate is 200 μs/V.
- What are the maximum and minimum input voltage levels for the SN74ABT125?
The input voltage range is from -0.5 V to 7.0 V.
- How much current can each output of the SN74ABT125 drive?
Each output can drive up to -32 mA in the high state and up to 64 mA in the low state.
- What is the input transition rise or fall rate for the SN74ABT125?
The input transition rise or fall rate is 10 ns/V.
- What packages are available for the SN74ABT125?
The device is available in various packages including PDIP, SOIC, SOP, and QFN.
