资 源 简 介
The SN54LVCH245A octal bus transceiver is designed for 2.7-V to 3.6-V VCC operaTIon, and the SN74LVCH245A octal bus transceiver is designed for 1.65-V to 3.6-V VCC operaTIon.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.
These devices are fully specified for parTIal-power-down applicaTIons using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are 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.
