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.