Part Number : SN74ACT245
Function : OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Manufacturers : Texas Instruments
4.5-V to 5.5-V Vcc Operation
Inputs Accept Voltages to 5.5 V
Max Tpd of 8 ns at 5 V
Inputs Are TTL-Voltage Compatible
These octal bus transceivers are 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 upon the logic level at the direction-control (DIR) input. A high onOEdisables
the device so that the buses are effectively isolated.
To ensure the high-impedance state during power up or power down, OEshould be tied to VCCthrough a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
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