CD74AC109E datasheet by Texas Instruments

CD74AC109E Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the CD74AC109E?
  The recommended operating voltage range for the CD74AC109E is 2V to 6V, with a typical operating voltage of 5V.
• How do I handle the output enable (OE) pin in my design?
  The output enable (OE) pin is active-low, meaning that the outputs are enabled when OE is low and disabled when OE is high. You should connect OE to a logic low signal to enable the outputs and a logic high signal to disable them.
• What is the maximum clock frequency that the CD74AC109E can handle?
  The maximum clock frequency that the CD74AC109E can handle is 40 MHz, but this can vary depending on the operating voltage and load capacitance. It's recommended to check the datasheet for specific timing characteristics.
• Can I use the CD74AC109E in a 3.3V system?
  Yes, the CD74AC109E can be used in a 3.3V system, but you should ensure that the input signals are compatible with the 3.3V logic level. You may need to use level translators or voltage dividers to interface with 5V logic signals.
• How do I ensure that the CD74AC109E is properly powered and bypassed?
  To ensure proper operation, you should provide a stable power supply to the CD74AC109E, with a decoupling capacitor (typically 0.1uF) connected between the VCC and GND pins, as close to the device as possible.