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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)

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.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.