74HC157D,653 datasheet by NXP Semiconductors

74HC157D,653 Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the 74HC157D,653?
  The maximum frequency of operation for the 74HC157D,653 is 100 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the 74HC157D,653 is properly powered?
  To ensure proper power supply, connect VCC to a stable 2.0 V to 6.0 V power source, and GND to a reliable ground connection. Also, decouple the power supply with a 0.1 μF capacitor to reduce noise and ensure stable operation.
• What is the maximum current that the 74HC157D,653 can sink or source?
  The 74HC157D,653 can sink or source up to 25 mA of current per output pin, but it's recommended to limit the current to 10 mA or less to ensure reliable operation and prevent overheating.
• How do I handle the enable inputs (E1 and E2) to ensure proper operation?
  The enable inputs (E1 and E2) are active-low, meaning they must be pulled low to enable the device. Connect them to a logic low signal or a pull-down resistor to ensure proper operation. Leaving them floating can cause unpredictable behavior.
• What is the propagation delay of the 74HC157D,653?
  The propagation delay of the 74HC157D,653 is typically around 10 ns to 20 ns, depending on the operating frequency and temperature. This delay should be considered when designing high-speed applications.