Overview
The SN74LVC125A, produced by Texas Instruments, is a quadruple bus buffer gate designed for operation within a wide voltage range of 1.65V to 3.6V. This device features four independent line drivers, each with 3-state outputs. The 3-state outputs allow the device to be used in a variety of applications where data needs to be buffered and controlled. Each output can be disabled by setting the associated output-enable (OE) input high, ensuring a high-impedance state during power-up or power-down. This makes the SN74LVC125A versatile for use in mixed 3.3V/5V system environments.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC Supply Voltage Range | 1.65 | 3.6 | V |
| VI Input Voltage Range | -0.5 | 6.5 | V |
| VO Output Voltage Range | -0.5 | VCC + 0.5 | V |
| Operating Temperature Range | -40 | 125 | °C |
| High-Level Input Voltage (VIH) | 0.65 × VCC (1.65V to 1.95V) | 2 (2.7V to 3.6V) | V |
| Low-Level Input Voltage (VIL) | 0.35 × VCC (1.65V to 1.95V) | 0.8 (2.7V to 3.6V) | V |
| High-Level Output Current (IOH) | -4 (VCC = 1.8V) | -24 (VCC = 3V) | mA |
| Low-Level Output Current (IOL) | 4 (VCC = 1.8V) | 24 (VCC = 3V) | mA |
| Input Transition Rise or Fall Rate | 8 | 10 | ns/V |
Key Features
- 3-State outputs with separate OE for all 4 buffers
- Operates from 1.65V to 3.6V, allowing for use in a wide range of voltage environments
- Inputs can be driven from either 3.3V or 5V devices, enabling mixed-voltage system compatibility
- High-impedance state during power-up or power-down when OE is high
- Low power dissipation and high-speed operation
- Available in various packages including WQFN, SOIC, SSOP, SOP, TSSOP, and VQFN
Applications
- Power monitoring units (PMU)
- Wireless battery monitoring
- Remote electrical tilt units (RET)
- Remote radio units (RRU)
- Tower mounted amplifiers (TMA)
- Vector signal analyzers and generators
- Video conferencing: IP-based HD
- WiMAX and wireless infrastructure equipment
- Wireless communications testers
- xDSL modems and DSLAM
Q & A
- What is the operating voltage range of the SN74LVC125A?
The SN74LVC125A operates from 1.65V to 3.6V.
- What is the purpose of the 3-state outputs in the SN74LVC125A?
The 3-state outputs allow the device to be in a high-impedance state when the output-enable (OE) input is high, which is useful during power-up or power-down.
- Can the SN74LVC125A be used in mixed 3.3V/5V system environments?
- What are the typical applications of the SN74LVC125A?
The SN74LVC125A is used in various applications including power monitoring units, wireless battery monitoring, remote electrical tilt units, remote radio units, and more.
- What are the available package options for the SN74LVC125A?
The SN74LVC125A is available in several packages including WQFN, SOIC, SSOP, SOP, TSSOP, and VQFN.
- What is the maximum continuous output current for the SN74LVC125A?
The maximum continuous output current for the SN74LVC125A is ±50 mA.
- What is the recommended operating temperature range for the SN74LVC125A?
The recommended operating temperature range for the SN74LVC125A is from -40°C to 125°C.
- How should unused inputs be handled on the SN74LVC125A?
Unused inputs must be held at VCC or GND to ensure proper device operation.
- What is the input transition rise or fall rate for the SN74LVC125A?
The input transition rise or fall rate for the SN74LVC125A is 8 to 10 ns/V.
- What is the power dissipation capacitance per gate for the SN74LVC125A?
The power dissipation capacitance per gate for the SN74LVC125A varies by VCC, typically around 7.4 pF at 1.8V, 11.3 pF at 2.5V, and 15 pF at 3.3V.
