SN74LVC540A-Q1

汽车类具有三态输出的八路缓冲器/驱动器

The SN74LVC540A octal buffer/driver is designed for 2.7-V to 3.6-V VCC operation.

This device is ideal for driving bus lines or buffer-memory address registers. This device features inputs and outputs on opposite sides of the package that facilitate printed circuit board layout.

The 3-state control gate is a 2-input AND gate with active-low inputs so that, if either output-enable OE1 or OE2 input is high, all outputs are in the high-impedance state.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in a mixed 3.3-V/5-V system environment.

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.

.

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

.

Operates From 2 V to 3.6 V

.

Inputs Accept Voltages to 5.5 V

.

Max tpd of 5.3 ns at 3.3 V

.

Typical VOLP Output Ground Bounce

   <0.8 V at VCC = 3.3 V, TA = 25°C

.

Typical VOHV Output VOH Undershoot

   >2 V at VCC = 3.3 V, TA = 25°C

.

Supports Mixed-Mode Signal Operation on All Ports 5-V Input/Output Voltage With 3.3-V VCC

.

Ioff Supports Partial-Power-Down Mode Operation