Overview
The SN74LVC125ADT is a quadruple bus buffer gate produced by Texas Instruments. This device is designed to operate within a voltage range of 1.65V to 3.6V, making it versatile for various digital circuit applications. It features four independent line drivers, each with 3-state outputs, which can be disabled by setting the associated output-enable (OE) input high. This component is particularly useful in mixed 3.3V/5V system environments due to its ability to accept input voltages up to 5.5V.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (D) - 14 pins |
| Operating Voltage Range | 1.65V to 3.6V |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | Up to 5.5V |
| Maximum Propagation Delay (tpd) at 3.3V | 4.8ns |
| Typical VOLP (Output Ground Bounce) at VCC = 3.3V, TA = 25°C | < 0.8V |
| Typical VOHV (Output VOH Undershoot) at VCC = 3.3V, TA = 25°C | > 2V |
| Latch-up Performance | Exceeds 250mA per JESD 17 |
Key Features
- 3-State outputs
- Separate OE (Output Enable) 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
- Low propagation delay of 4.8ns at 3.3V
- Low output ground bounce and VOH undershoot
- Latch-up performance exceeds 250mA per JESD 17
Applications
The SN74LVC125ADT is suitable for a variety of applications, including:
- Mixed 3.3V/5V system environments where voltage translation is necessary.
- High-speed digital circuits requiring low propagation delays.
- Systems that need 3-state outputs for bus control and signal isolation.
- Industrial and automotive applications due to its wide operating temperature range.
Q & A
- What is the operating voltage range of the SN74LVC125ADT?
The SN74LVC125ADT operates within a voltage range of 1.65V to 3.6V.
- What is the maximum propagation delay at 3.3V for the SN74LVC125ADT?
The maximum propagation delay at 3.3V is 4.8ns.
- Can the SN74LVC125ADT accept input voltages higher than its operating voltage?
Yes, the SN74LVC125ADT can accept input voltages up to 5.5V.
- What is the purpose of the OE (Output Enable) input in the SN74LVC125ADT?
The OE input is used to disable the output, placing it in a high-impedance state when set high.
- What is the latch-up performance of the SN74LVC125ADT according to JESD 17?
The latch-up performance exceeds 250mA per JESD 17.
- What is the typical output ground bounce and VOH undershoot at VCC = 3.3V and TA = 25°C?
The typical output ground bounce is less than 0.8V, and the VOH undershoot is greater than 2V.
- What type of package does the SN74LVC125ADT come in?
The SN74LVC125ADT comes in a 14-pin SOIC (D) package.
- What is the operating temperature range of the SN74LVC125ADT?
The operating temperature range is from -40°C to 125°C.
- Can the SN74LVC125ADT be used in mixed voltage systems?
Yes, it can be used in mixed 3.3V/5V system environments.
- 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 pullup resistor to ensure the high-impedance state during power-up or power-down.
