CD74HC139EE4 datasheet by Texas Instruments

CD74HC139EE4 Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for CD74HC139EE4?
  The maximum frequency of operation for CD74HC139EE4 is 25 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure proper power sequencing when using CD74HC139EE4?
  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 prevent latch-up and ensures reliable operation.
• What is the recommended operating voltage range for CD74HC139EE4?
  The recommended operating voltage range for CD74HC139EE4 is 2V to 6V, with a typical operating voltage of 5V. Operating outside this range may affect the device's performance and reliability.
• How do I handle unused inputs on CD74HC139EE4?
  Unused inputs on CD74HC139EE4 should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure reliable operation.
• What is the maximum output current that CD74HC139EE4 can sink or source?
  The maximum output current that CD74HC139EE4 can sink or source is 25 mA per output pin, with a total device current limit of 100 mA.