SN74LVT125DR

TEXAS INSTRUMENTS  SN74LVT125DR  总线缓冲器

description/ordering information

This bus buffer is designed specifically for low-voltage 3.3-V VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The SN74LVT125 features independent line drivers with 3-state outputs. Each output is in the high-impedance state when the associated output-enable OE input is high.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

• Supports Mixed-Mode Signal Operation

   5-V Input and Output Voltages With 3.3-V VCC

• Supports Unregulated Battery Operation Down to 2.7 V

• Typical VOLP Output Ground Bounce

   <0.8 V at VCC = 3.3 V, TA = 25°C

• Ioff Supports Partial-Power-Down Mode Operation

• Bus-Hold Data Inputs Eliminate the Need for External Pullup Resistors

• Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17

• ESD Protection Exceeds JESD 22

   − 2000-V Human-Body Model A114-A

   − 200-V Machine Model A115-A