CD74HC4015E datasheet by Texas Instruments

CD74HC4015E Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC4015E?
  The maximum frequency of operation for the CD74HC4015E is 10 MHz, but it can vary depending on the specific application and operating conditions.
• How do I handle the enable pins (EN1 and EN2) when using the CD74HC4015E?
  The enable pins (EN1 and EN2) are active-low, meaning that they must be pulled low to enable the corresponding half of the shift register. When not in use, they should be pulled high to disable the shift register.
• What is the recommended power-up sequence for the CD74HC4015E?
  The recommended power-up sequence for the CD74HC4015E is to apply power to the VCC pin first, followed by the input signals. This helps to prevent unwanted output states during power-up.
• Can I use the CD74HC4015E with a 5V power supply?
  Yes, the CD74HC4015E can operate with a 5V power supply, but it is recommended to use a 2.0V to 6.0V power supply for optimal performance and to ensure compatibility with other devices in the system.
• How do I handle the clock input (CLK) when using the CD74HC4015E?
  The clock input (CLK) should be a square wave with a minimum high-level input voltage of 3.5V and a maximum low-level input voltage of 1.5V. The clock frequency should be within the recommended operating range for the device.