SN74HC257DR datasheet by Texas Instruments

SN74HC257DR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HC257DR can handle?
  The maximum clock frequency of the SN74HC257DR is typically 40 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the SN74HC257DR is properly powered?
  The SN74HC257DR requires a single 2-V to 6-V power supply, and it's essential to ensure that the power supply is clean and well-regulated to prevent noise and oscillations.
• What is the propagation delay of the SN74HC257DR?
  The propagation delay of the SN74HC257DR is typically around 10-15 ns, but it can vary depending on the specific application and operating conditions.
• Can I use the SN74HC257DR in a 3.3-V system?
  Yes, the SN74HC257DR is compatible with 3.3-V systems, and it can operate with a supply voltage as low as 2 V.
• How do I handle the enable inputs (E1 and E2) of the SN74HC257DR?
  The enable inputs (E1 and E2) must be connected to a valid logic level (either high or low) to ensure proper operation of the device. Leaving them floating can cause unpredictable behavior.