The recommended operating voltage range for M74HCT125M1R is 4.5V to 5.5V, as specified in the datasheet. However, it's recommended to operate the device at a stable voltage of 5V ± 10% for optimal performance.
When the input pins are not in use, it's recommended to tie them to VCC or GND through a pull-up or pull-down resistor, respectively, to prevent floating inputs and ensure proper device operation.
The maximum frequency of operation for M74HCT125M1R is typically around 30-40 MHz, depending on the specific application and operating conditions. However, it's recommended to consult the datasheet and perform simulations to determine the maximum frequency for a specific design.
To ensure signal integrity and minimize noise, it's recommended to use proper PCB design techniques, such as using a solid ground plane, minimizing trace lengths, and using decoupling capacitors. Additionally, consider using series resistors or ferrite beads to reduce high-frequency noise.
While M74HCT125M1R is specified for 5V operation, it can be used in a 3.3V system with some limitations. However, the device's performance and noise immunity may be compromised, and the output voltage levels may not meet the required specifications. It's recommended to consult the datasheet and perform simulations to determine the feasibility of using M74HCT125M1R in a 3.3V system.
M74HCT125M1R datasheet
by STMicroelectronics
