The maximum operating frequency of the SN74LVC8T245DBR is 100 MHz.
Yes, the SN74LVC8T245DBR is compatible with 3.3V systems and can operate with a supply voltage range of 1.65V to 3.6V.
The direction control pins (DIR) should be tied to a valid logic level (VCC or GND) to configure the direction of data flow. Leaving them floating can cause unpredictable behavior.
The propagation delay of the SN74LVC8T245DBR is approximately 2.5 ns at 25°C with a 3.3V supply voltage.
No, the SN74LVC8T245DBR is not compatible with 5V systems and may be damaged if operated at 5V. The maximum recommended supply voltage is 3.6V.
SN74LVC8T245DBR datasheet
by Texas Instruments
