SN74HC257NSR datasheet by Texas Instruments

SN74HC257NSR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC257NSR?
  The maximum operating frequency of the SN74HC257NSR is 100 MHz, but it can vary depending on the specific application and operating conditions.
• How do I handle the power-up and power-down sequencing of the SN74HC257NSR?
  It is recommended to power up the VCC pin before the input signals and power down the VCC pin after the input signals to prevent unwanted output states.
• What is the recommended operating voltage range for the SN74HC257NSR?
  The recommended operating voltage range for the SN74HC257NSR is 2V to 6V, with a typical operating voltage of 5V.
• How do I ensure the SN74HC257NSR is properly terminated?
  The SN74HC257NSR requires proper termination to prevent signal reflections and ensure reliable operation. This can be achieved by using a termination resistor at the output of the device, typically 50-75 ohms.
• What is the maximum current that the SN74HC257NSR can sink or source?
  The maximum current that the SN74HC257NSR can sink or source is 25 mA per output pin, with a total current limit of 100 mA for all output pins combined.