CD74HC21E datasheet by Texas Instruments

CD74HC21E Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC21E?
  The CD74HC21E can operate at frequencies up to 25 MHz.
• How do I ensure that the CD74HC21E is properly powered?
  The CD74HC21E requires a 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.
• What is the maximum input voltage that the CD74HC21E can handle?
  The maximum input voltage that the CD74HC21E can handle is 6.0 V, and exceeding this voltage may cause damage to the device.
• How do I handle the output of the CD74HC21E?
  The output of the CD74HC21E is an open-drain output, which means it can sink current but cannot source current. Therefore, an external pull-up resistor is required to pull the output high.
• What is the propagation delay of the CD74HC21E?
  The propagation delay of the CD74HC21E is typically around 10 ns, but it can vary depending on the operating frequency and load capacitance.