SN74HC251DR datasheet by Texas Instruments

SN74HC251DR Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74HC251DR?
  The maximum frequency of operation for the SN74HC251DR is 40 MHz.
• Can I use the SN74HC251DR in a 5V system?
  Yes, the SN74HC251DR is compatible with 5V systems, but it's recommended to use a voltage regulator to ensure a stable 5V supply.
• How do I handle the enable inputs (EN1 and EN2) when not in use?
  When not in use, the enable inputs (EN1 and EN2) should be tied to VCC or GND to prevent floating inputs, which can cause unpredictable behavior.
• What is the propagation delay time for the SN74HC251DR?
  The propagation delay time for the SN74HC251DR is typically around 10-15 ns, but this can vary depending on the operating conditions and load capacitance.
• Can I use the SN74HC251DR in a 3.3V system?
  Yes, the SN74HC251DR is compatible with 3.3V systems, but the output voltage will be limited to 3.3V, and the input voltage thresholds may be affected.