CD54HC393F3A datasheet by Texas Instruments

CD54HC393F3A Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the CD54HC393F3A?
  The maximum clock frequency for the CD54HC393F3A is 40 MHz, but it can vary depending on the operating voltage and temperature. It's recommended to check the timing characteristics in the datasheet for specific frequency limits.
• How do I ensure that the CD54HC393F3A is properly powered and bypassed?
  To ensure proper power and bypassing, connect the VCC pin to a stable 2-6V power supply, and decouple it with a 0.1uF ceramic capacitor to ground. Additionally, connect a 10uF electrolytic capacitor between VCC and ground for further filtering.
• What is the recommended output current for the CD54HC393F3A?
  The recommended output current for the CD54HC393F3A is 4mA per output pin. Exceeding this current may cause voltage drops and affect the device's performance.
• How do I handle the asynchronous reset input (MR) on the CD54HC393F3A?
  The asynchronous reset input (MR) should be tied to VCC through a pull-up resistor (e.g., 1kΩ) to ensure proper operation. When MR is low, the device is reset, and all outputs are cleared.
• What is the propagation delay for the CD54HC393F3A?
  The propagation delay for the CD54HC393F3A varies depending on the operating voltage and temperature. Typically, it ranges from 10-30ns for clock-to-output and 5-15ns for data-to-output. Refer to the datasheet for specific delay values.