SN74HC158D datasheet by Texas Instruments

SN74HC158D Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74HC158D?
  The maximum frequency of operation for the SN74HC158D is 100 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the SN74HC158D is properly powered and decoupled?
  To ensure proper power and decoupling, use a 5V power supply, add a 0.1uF ceramic capacitor between VCC and GND, and consider adding additional decoupling capacitors near the device.
• What is the maximum current that the SN74HC158D can sink or source?
  The SN74HC158D can sink or source up to 25mA per output, but it's recommended to limit the current to 10mA or less to ensure reliable operation.
• How do I handle the enable inputs (E1, E2, E3, E4) when not using them?
  When not using the enable inputs, tie them to VCC or GND depending on the desired state. Leaving them floating can cause unpredictable behavior.
• What is the propagation delay of the SN74HC158D?
  The propagation delay of the SN74HC158D is typically around 10-15ns, but it can vary depending on the specific application and operating conditions.