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 independent line drivers with 3-state outputs, making it suitable for various applications requiring data buffering and translation. Each output is controlled by a separate output-enable (OE) input, allowing for precise control over the data flow. The device is specified to operate over a temperature range of –40°C to 85°C and –40°C to 125°C, ensuring reliability in diverse environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (PW) | |
| Pins | 14 | |
| Operating Temperature Range | –40°C to 125°C | °C |
| Supply Voltage Range | 1.65V to 3.6V | V |
| Input Voltage Range | –0.5V to 6.5V | V |
| Output Voltage Range | –0.5V to VCC + 0.5V | V |
| Maximum Propagation Delay (tpd) | 4.8ns at 3.3V | ns |
| Power Dissipation Capacitance per Gate | 15 pF at 3.3V, f = 10MHz | pF |
| High-Level Output Current (IOH) | –24 mA at VCC = 3V | mA |
| Low-Level Output Current (IOL) | 24 mA at VCC = 3V | mA |
Key Features
- 3-State outputs
- 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 to 5.5V
- Maximum propagation delay 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
The SN74LVC125A is versatile and can be used in a variety of applications, including:
- Data buffering and translation in mixed 3.3V/5V system environments
- High-speed data transmission systems requiring low propagation delays
- Industrial and automotive systems that require operation over a wide temperature range
- Any system needing independent control over multiple data lines
Q & A
- What is the operating voltage range of the SN74LVC125A?
The SN74LVC125A operates from 1.65V to 3.6V. - What is the maximum propagation delay of the SN74LVC125A at 3.3V?
The maximum propagation delay is 4.8ns at 3.3V. - How many buffers does the SN74LVC125A have, and what type of outputs do they have?
The SN74LVC125A has four buffers, each with 3-state outputs. - What is the temperature range over which the SN74LVC125A is specified?
The device is specified to operate from –40°C to 85°C and –40°C to 125°C. - Can the inputs of the SN74LVC125A accept voltages higher than the supply voltage?
Yes, the inputs can accept voltages up to 5.5V. - How should the OE input be managed 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 is the latch-up performance of the SN74LVC125A?
The latch-up performance exceeds 250mA per JESD 17. - What is the typical output ground bounce (VOLP) and output VOH undershoot (VOHV) at 3.3V and 25°C?
The typical VOLP is < 0.8V, and the typical VOHV is > 2V. - Can the SN74LVC125A be used in mixed 3.3V/5V system environments?
Yes, it can be used as a translator in mixed 3.3V/5V system environments. - What is the package type and pin count of the SN74LVC125APWE4?
The package type is TSSOP (PW) with 14 pins.
