CD74HC42E datasheet by Texas Instruments

CD74HC42E Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC42E?
  The CD74HC42E can operate up to 30 MHz, but the maximum frequency of operation depends on the specific application and the capacitive load on the output.
• How do I ensure that the CD74HC42E is properly powered?
  The CD74HC42E requires a single power supply voltage (VCC) of 2.0 V to 6.0 V, and it is recommended to decouple the power supply with a 0.1 μF capacitor to reduce noise and ensure stable operation.
• What is the output current capability of the CD74HC42E?
  The CD74HC42E can source or sink up to 25 mA of current per output, but it is recommended to limit the output current to 10 mA or less to ensure reliable operation and prevent overheating.
• How do I handle the thermal considerations for the CD74HC42E?
  The CD74HC42E has a maximum junction temperature (TJ) of 150°C, and it is recommended to keep the device temperature below 85°C to ensure reliable operation. Proper thermal design and heat sinking may be necessary for high-power or high-frequency applications.
• Is the CD74HC42E compatible with 3.3 V or 5 V logic?
  Yes, the CD74HC42E is compatible with 3.3 V or 5 V logic, but it is recommended to use a voltage regulator or level shifter if the input signals are not compatible with the power supply voltage.