The maximum frequency of operation for CD74HCT125M is 40 MHz.
Yes, CD74HCT125M is compatible with 5V systems, but it's recommended to use a voltage regulator to ensure a stable 5V supply.
The output enable (OE) pin is active-low, meaning it should be connected to GND to enable the outputs. Leaving it unconnected or connecting it to VCC will disable the outputs.
The propagation delay of CD74HCT125M is typically around 10-15 ns, but it can vary depending on the operating conditions and load capacitance.
Yes, CD74HCT125M is compatible with 3.3V systems, but the output voltage will be limited to around 3.3V. Ensure that the load devices can operate with this reduced voltage.