74HC137D datasheet by NXP Semiconductors

74HC137D Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the 74HC137D?
  The maximum frequency of operation for the 74HC137D is 25 MHz, but it can vary depending on the supply voltage and load conditions.
• How do I ensure that the 74HC137D 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 solid ground plane. Decouple the power supply with a 0.1 μF ceramic capacitor.
• What is the maximum current that the 74HC137D can sink or source?
  The 74HC137D can sink or source up to 25 mA per output pin, but the total current should not exceed 100 mA for the entire device.
• How do I handle the enable inputs (E1, E2, E3) to ensure proper operation?
  The enable inputs (E1, E2, E3) are active-low, so connect them to GND to enable the decoder. Connect them to VCC to disable the decoder. Use a pull-down resistor if the enable inputs are not driven.
• What is the propagation delay of the 74HC137D?
  The propagation delay of the 74HC137D is typically around 10 ns to 20 ns, depending on the supply voltage and temperature.