CD74HC221PWRE4 datasheet by Texas Instruments

CD74HC221PWRE4 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the CD74HC221PWRE4?
  The maximum operating frequency of the CD74HC221PWRE4 is 25 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure reliable operation of the CD74HC221PWRE4 in high-temperature environments?
  To ensure reliable operation in high-temperature environments, it is recommended to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its specified temperature range (-40°C to 125°C).
• What is the recommended power-on sequence for the CD74HC221PWRE4?
  The recommended power-on sequence for the CD74HC221PWRE4 is to apply power to the VCC pin before applying any input signals, and to ensure that the power supply is stable and within the specified voltage range (2V to 6V) before applying any inputs.
• How do I handle asynchronous inputs to the CD74HC221PWRE4?
  Asynchronous inputs to the CD74HC221PWRE4 should be synchronized to the clock signal using a flip-flop or other synchronization circuit to prevent metastability and ensure reliable operation.
• What is the maximum capacitive load that the CD74HC221PWRE4 can drive?
  The maximum capacitive load that the CD74HC221PWRE4 can drive is 100 pF, but this can vary depending on the specific application and operating conditions.