The recommended operating voltage range for CD54HCT03F3A is 4.5V to 5.5V, as specified in the datasheet. However, it's recommended to operate the device at a fixed voltage of 5V 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 to prevent them from floating. This helps to prevent unwanted switching and reduces power consumption.
The maximum frequency of operation for CD54HCT03F3A is typically limited by the rise and fall times of the input signals. As a general rule, the device can operate at frequencies up to 30MHz, but this may vary depending on the specific application and operating conditions.
To ensure that the output signals are not distorted or attenuated, it's recommended to use a suitable load impedance and to keep the output traces as short as possible. Additionally, the output signals should be terminated with a suitable load resistor to prevent reflections and ringing.
While the CD54HCT03F3A is specified for 5V operation, it can be used in a 3.3V system with some limitations. The device will still function, but the output voltage levels may not be as high, and the noise immunity may be reduced. It's recommended to consult the datasheet and perform thorough testing to ensure the device meets the system requirements.
CD54HCT03F3A datasheet
by Texas Instruments
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