CD74HC257E datasheet by Texas Instruments

CD74HC257E Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC257E?
  The maximum frequency of operation for the CD74HC257E is 25 MHz, but it can vary depending on the operating voltage and load capacitance.
• How do I ensure that the CD74HC257E is properly powered?
  To ensure proper power supply, connect VCC to a stable 2-V to 6-V power source, and GND to a reliable ground connection. Also, decouple the power supply with a 0.1-μF capacitor to reduce noise and ensure stable operation.
• What is the maximum input voltage that the CD74HC257E can handle?
  The maximum input voltage that the CD74HC257E can handle is 6.5 V, which is the absolute maximum rating. However, it's recommended to keep the input voltage within the recommended operating voltage range of 2 V to 6 V for reliable operation.
• Can I use the CD74HC257E in a 3.3-V system?
  Yes, the CD74HC257E can be used in a 3.3-V system. In fact, it's a popular choice for 3.3-V systems due to its wide operating voltage range of 2 V to 6 V.
• How do I handle the unused inputs of the CD74HC257E?
  Unused inputs of the CD74HC257E should be tied to a valid logic level (either VCC or GND) to prevent them from floating and causing unwanted switching or power consumption.