SN7408N datasheet by Texas Instruments

SN7408N Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN7408N?
  The maximum frequency of operation for the SN7408N is typically around 30-40 MHz, but this can vary depending on the specific application and operating conditions.
• How do I ensure that the SN7408N is properly powered?
  To ensure proper operation, the SN7408N should be powered with a stable voltage supply between 4.75V and 5.25V, with a maximum current draw of 40mA. Decoupling capacitors should also be used to filter out noise and ensure stable operation.
• What is the input voltage threshold for the SN7408N?
  The input voltage threshold for the SN7408N is typically around 2.0V for a logic high and 0.8V for a logic low, but this can vary depending on the specific application and operating conditions.
• Can I use the SN7408N in a 3.3V system?
  While the SN7408N is typically specified for 5V operation, it can be used in a 3.3V system with some limitations. However, the output voltage levels may not be compatible with 3.3V logic, and the noise margin may be reduced.
• How do I handle thermal considerations for the SN7408N?
  The SN7408N is typically packaged in a PDIP or SOIC package, and thermal considerations should be taken into account to prevent overheating. A thermal derating curve is provided in the datasheet to help designers estimate the maximum power dissipation for their specific application.