SN74HC253N datasheet by Texas Instruments

SN74HC253N Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74HC253N?
  The maximum frequency of operation for the SN74HC253N is 50 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the SN74HC253N is properly powered?
  To ensure proper power supply, connect VCC to a stable 2V to 6V power source, and GND to a reliable ground connection. Also, decouple the power supply with a 0.1uF capacitor to reduce noise and ensure stable operation.
• What is the maximum current that the SN74HC253N can sink or source?
  The SN74HC253N can sink or source up to 25mA of current per output pin, but it's recommended to limit the current to 10mA or less to ensure reliable operation and prevent overheating.
• How do I handle the unused inputs on the SN74HC253N?
  Unused inputs on the SN74HC253N should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper operation. Floating inputs can cause unpredictable behavior and increased power consumption.
• Is the SN74HC253N 5V tolerant?
  Yes, the SN74HC253N is 5V tolerant, meaning it can accept input voltages up to 5.5V even when operated at a lower supply voltage (e.g., 3.3V). However, the output voltage will still be limited to the supply voltage (VCC).