SN74HC158DR datasheet by Texas Instruments

SN74HC158DR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC158DR?
  The maximum operating frequency of the SN74HC158DR is 100 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure reliable operation of the SN74HC158DR in high-temperature environments?
  To ensure reliable operation in high-temperature environments, it is recommended to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its specified temperature range (-40°C to 125°C).
• What is the recommended power-up sequence for the SN74HC158DR?
  The recommended power-up sequence for the SN74HC158DR is to apply power to the VCC pin before applying any input signals, and to ensure that all input signals are stable before applying power to the VCC pin.
• How do I handle unused inputs on the SN74HC158DR?
  Unused inputs on the SN74HC158DR should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure reliable operation.
• What is the maximum current that can be sourced or sunk by the SN74HC158DR?
  The maximum current that can be sourced or sunk by the SN74HC158DR is 25 mA per output pin, but it is recommended to limit the current to 10 mA or less to ensure reliable operation and prevent overheating.