SN74HC02D datasheet by Texas Instruments

SN74HC02D Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74HC02D?
  The maximum frequency of operation for the SN74HC02D is typically around 100 MHz, but this can vary depending on the specific application and operating conditions.
• How do I ensure that the SN74HC02D is properly powered and decoupled?
  To ensure proper operation, the SN74HC02D should be powered with a stable voltage supply between 2V and 6V, and decoupling capacitors (e.g. 0.1uF and 10uF) should be placed close to the device to filter out noise and reduce electromagnetic interference (EMI).
• What is the input voltage threshold for the SN74HC02D?
  The input voltage threshold for the SN74HC02D is typically around 0.8V for a logic high and 0.2V for a logic low, but this can vary depending on the specific application and operating conditions.
• Can I use the SN74HC02D in a 5V system?
  Yes, the SN74HC02D can be used in a 5V system, but it's recommended to use a voltage regulator to ensure a stable 5V supply, and to follow proper PCB design and layout guidelines to minimize noise and EMI.
• How do I handle unused inputs on the SN74HC02D?
  Unused inputs on the SN74HC02D should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper device operation.