CD74HC139ME4 datasheet by Texas Instruments

CD74HC139ME4 Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the CD74HC139ME4?
  The maximum frequency of operation for the CD74HC139ME4 is 25 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure proper power sequencing when using the CD74HC139ME4?
  To ensure proper power sequencing, it is recommended to power up the VCC pin before the input signals, and power down the VCC pin after the input signals. This helps to prevent latch-up and damage to the device.
• What is the recommended operating voltage range for the CD74HC139ME4?
  The recommended operating voltage range for the CD74HC139ME4 is 2V to 6V, with a typical operating voltage of 5V.
• How do I handle unused inputs on the CD74HC139ME4?
  Unused inputs on the CD74HC139ME4 should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper device operation.
• What is the maximum output current that the CD74HC139ME4 can sink or source?
  The maximum output current that the CD74HC139ME4 can sink or source is 25 mA, but it is recommended to limit the output current to 10 mA or less to ensure reliable operation.