The maximum operating frequency of the SN74ACT573DBR is 100 MHz.
Yes, the SN74ACT573DBR is compatible with 3.3V systems, but it can also operate at 5V. However, the output voltage will be limited to the VCC supply voltage.
It is recommended to power up the VCC supply before applying any input signals, and to power down the VCC supply after removing all input signals. This ensures that the device is in a stable state during power-up and power-down.
The SN74ACT573DBR can sink up to 24 mA and source up to 24 mA per output pin.
The SN74ACT573DBR is rated for operation up to 85°C, but it can be used in higher temperature environments with derating. Consult the datasheet for specific derating information.