CD74HC251E datasheet by Texas Instruments

CD74HC251E Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC251E?
  The maximum frequency of operation for the CD74HC251E is 25 MHz, but it can vary depending on the supply voltage and operating conditions.
• How do I ensure that the CD74HC251E is properly powered?
  To ensure proper power supply, connect VCC to a 2.0-V to 6.0-V power supply, and GND to a 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 CD74HC251E can handle?
  The maximum input voltage that the CD74HC251E can handle is 6.0 V, which is the maximum rating for the device. Exceeding this voltage can cause damage to the device.
• How do I handle unused inputs on the CD74HC251E?
  Unused inputs on the CD74HC251E should be tied to a logic level (either VCC or GND) to prevent them from floating and causing unintended behavior.
• Is the CD74HC251E compatible with 5-V logic?
  Yes, the CD74HC251E is compatible with 5-V logic, but it can also operate at lower voltages down to 2.0 V. However, the output voltage levels may not be compatible with 5-V logic at lower supply voltages.