SN74LVT125屬于集成電路（IC）的緩沖器驅(qū)動器接收器收發(fā)器。由美國德州儀器公司制造生產(chǎn)的SN74LVT125緩沖器，驅(qū)動器，接收器，收發(fā)器邏輯緩沖器、驅(qū)動器、接收器和收發(fā)器允許隔離對某個電路的邏輯信號的訪問，以用于另一電路。緩沖器將其輸入信號（不變或反相）傳遞到其輸出，并可能用于清除弱信號或驅(qū)動負(fù)載。在布爾邏輯仿真器中，緩沖器主要用于增加傳播延遲。邏輯接收器和收發(fā)器允許在數(shù)據(jù)總線之間進行隔離通信。

1FEATURES

· Qualified for Automotive Applications

· ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

· 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

DESCRIPTION/ORDERING INFORMATION

SN74LVT125-Q1

www.ti.com....................................................................................................................................................... SCBS763B–AUGUST 2003–REVISED APRIL 2008

3.3-V ABT QUADRUPLE BUS BUFFER

WITH 3-STATE OUTPUTS

· Qualified for Automotive Applications

· ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

· 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

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-Q1 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.