CD74HC123E datasheet by Texas Instruments

CD74HC123E Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC123E?
  The maximum frequency of operation for the CD74HC123E is 10 MHz.
• Can I use the CD74HC123E in a 5V system?
  Yes, the CD74HC123E 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 reset pin (MR) in my design?
  The reset pin (MR) should be tied to VCC through a pull-up resistor (e.g., 1 kΩ) to ensure proper operation. A capacitor (e.g., 10 nF) can be added in parallel to filter out noise.
• What is the purpose of the enable input (EN) in the CD74HC123E?
  The enable input (EN) allows the oscillator to be enabled or disabled. When EN is low, the oscillator is enabled, and when EN is high, the oscillator is disabled.
• Can I use the CD74HC123E in a 3.3V system?
  Yes, the CD74HC123E can operate in a 3.3V system, but the output frequency will be lower than in a 5V system. Consult the datasheet for specific frequency vs. voltage characteristics.