The maximum clock frequency for CD54HCT393F is 30 MHz, but it can vary depending on the specific application and operating conditions. It's recommended to check the device's timing specifications and perform thorough testing to ensure reliable operation.
The output enable (OE) pin in CD54HCT393F is active-low, meaning that the outputs are enabled when OE is low ( Logic 0) and disabled when OE is high (Logic 1). Make sure to connect OE to a valid logic level or use a pull-up/pull-down resistor to avoid floating inputs.
Texas Instruments recommends using a simple RC circuit (e.g., 1 kΩ resistor and 10 μF capacitor) to ensure a clean power-on reset (POR) for CD54HCT393F. This helps to prevent spurious outputs during power-up and ensures reliable operation.
While CD54HCT393F is specified for 4.5V to 5.5V operation, it's generally safe to use it in a 5V system. However, be aware that the device's power consumption and noise immunity may be affected at higher voltages. Always check the device's electrical characteristics and perform thorough testing to ensure reliable operation.
CD54HCT393F has a maximum junction temperature (TJ) of 150°C. To ensure proper thermal management, use a heat sink or thermal pad, and follow good PCB design practices (e.g., thermal vias, copper pours) to dissipate heat effectively. Also, avoid operating the device near its maximum power dissipation rating.
CD54HCT393F datasheet
by Texas Instruments
