The maximum frequency of operation for the 74HCT02D,653 is typically around 30-40 MHz, but this can vary depending on the specific application, supply voltage, and output load.
To ensure proper power and decoupling, connect the VCC pin to a stable 5V power supply, and decouple the power supply lines with a 0.1uF ceramic capacitor between VCC and GND, as close to the device as possible.
The input voltage threshold for the 74HCT02D,653 is typically around 2.0V for a logic high and 0.8V for a logic low, but this can vary slightly depending on the specific device and operating conditions.
While the 74HCT02D,653 is specified for 5V operation, it can typically operate with a 3.3V power supply, but the output voltage levels may not be as high, and the noise margin may be reduced.
Unused inputs on the 74HCT02D,653 should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper device operation.