Controlled Baseline
− One Assembly/Test Site, One Fabrication
Site
Enhanced Diminishing Manufacturing
Sources (DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree†
2-V to 6-V VCC Operation
Inputs Accept Voltages to 6 V
Max tpd of 7 ns at 5 V

description/ordering information
The SN74AC245 octal bus transceiver is designed for asynchronous two-way communication between data
buses. The control-function implementation minimizes external timing requirements.
When the output-enable (OE) is low, the device passes noninverted data from the A bus to the B bus or from
the B bus to the A bus, depending on the logic level at the direction control (DIR) input. A high on OE disables
the device so that the buses are effectively isolated.
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.