Overview
The SN74LVC125ADBR is a quadruple bus buffer gate produced by Texas Instruments. This device is designed for operation within a voltage range of 1.65V to 3.6V, making it versatile for various electronic systems. It features independent line drivers with 3-state outputs, allowing each output to be disabled when the associated output-enable (OE) input is high. This functionality is particularly useful in mixed 3.3V/5V system environments, enabling the device to act as a translator between different voltage levels.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC Supply Voltage Range | 1.65 | 3.6 | V |
| Operating Temperature Range | -40 | 125 | °C |
| Input Voltage Range | 0 | 5.5 | V |
| Output Voltage Range | 0 | VCC + 0.5 | V |
| High-Level Input Voltage (VCC = 3.3V) | 2 | 2 | V |
| Low-Level Input Voltage (VCC = 3.3V) | 0.8 | 0.8 | V |
| High-Level Output Current (VCC = 3.3V) | -24 | -24 | mA |
| Low-Level Output Current (VCC = 3.3V) | 24 | 24 | mA |
| Propagation Delay Time (tpd) at VCC = 3.3V | 1 | 4.8 | ns |
| Package Type | SSOP (DB), SOIC, TSSOP, VQFN |
Key Features
- 3-State outputs with separate OE for all 4 buffers
- Operates from 1.65V to 3.6V
- Specified from –40°C to 85°C and –40°C to 125°C
- Inputs accept voltages up to 5.5V
- Maximum propagation delay time (tpd) of 4.8ns at 3.3V
- Typical VOLP (output ground bounce) < 0.8V at VCC = 3.3V, TA = 25°C
- Typical VOHV (output VOH undershoot) > 2V at VCC = 3.3V, TA = 25°C
- Latch-up performance exceeds 250mA per JESD 17
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 SN74LVC125ADBR?
The SN74LVC125ADBR operates from 1.65V to 3.6V.
- What is the maximum propagation delay time (tpd) at 3.3V?
The maximum propagation delay time (tpd) at 3.3V is 4.8ns.
- Can the inputs of the SN74LVC125ADBR accept voltages higher than 3.3V?
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input is used to disable the output when it is high. When OE is low, the respective gate passes the data from the A input to its Y output.
- What are the typical output ground bounce and output VOH undershoot values at 3.3V?
The typical output ground bounce (VOLP) is less than 0.8V, and the typical output VOH undershoot (VOHV) is greater than 2V at VCC = 3.3V and TA = 25°C.
- What is the latch-up performance of the SN74LVC125ADBR?
The latch-up performance exceeds 250mA per JESD 17.
- What are some common applications of the SN74LVC125ADBR?
Common applications include power monitoring units, wireless battery monitoring, remote electrical tilt units, remote radio units, and various wireless infrastructure equipment.
- How should the OE input be configured during power up or power down to ensure a high-impedance state?
The OE input should be tied to VCC through a pull-up resistor to ensure the high-impedance state during power up or power down.
- What are the available package types for the SN74LVC125ADBR?
The available package types include SSOP (DB), SOIC, TSSOP, and VQFN.
- What is the operating temperature range of the SN74LVC125ADBR?
The operating temperature range is from –40°C to 125°C.
