CD54HC138F3A datasheet by Texas Instruments

CD54HC138F3A Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD54HC138F3A?
  The maximum frequency of operation for the CD54HC138F3A is 25 MHz.
• How do I ensure that the CD54HC138F3A is properly powered?
  To ensure proper power supply, connect VCC to a 5V power source and GND to ground. Also, decouple the power supply with a 0.1uF capacitor.
• What is the maximum current that the CD54HC138F3A can sink or source?
  The CD54HC138F3A can sink or source up to 6mA of current per output pin.
• How do I use the enable inputs (E1, E2, E3) to enable or disable the decoder?
  To enable the decoder, set all enable inputs (E1, E2, E3) to a logic low (0V). To disable the decoder, set any of the enable inputs to a logic high (VCC).
• What is the propagation delay of the CD54HC138F3A?
  The propagation delay of the CD54HC138F3A is typically around 10-15ns.