SN7405NE4 datasheet by Texas Instruments

SN7405NE4 Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the SN7405NE4?
  The recommended operating voltage range for the SN7405NE4 is 4.5V to 5.5V, although it can operate from 3V to 6V with reduced performance.
• How do I handle the input pins when they are not in use?
  When the input pins are not in use, they should be tied to a valid logic level (either VCC or GND) to prevent them from floating and causing unwanted behavior.
• What is the maximum current that the SN7405NE4 can sink or source?
  The SN7405NE4 can sink up to 16mA and source up to 12mA per output pin, although it's recommended to keep the current below 10mA to ensure reliable operation.
• Can I use the SN7405NE4 in a 3.3V system?
  Yes, the SN7405NE4 can be used in a 3.3V system, but the output voltage will be lower than 3.3V due to the internal voltage drop. The device will still function, but the output voltage may not be suitable for all applications.
• How do I ensure that the SN7405NE4 is properly decoupled?
  To ensure proper decoupling, a 0.1uF ceramic capacitor should be placed as close as possible to the VCC pin, and a 10uF electrolytic capacitor should be placed near the device to filter out power supply noise.