SN74HC594DT datasheet by Texas Instruments

SN74HC594DT Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the SN74HC594DT?
  The maximum clock frequency for the SN74HC594DT is 25 MHz, but it can vary depending on the operating voltage and temperature. It's recommended to check the timing characteristics in the datasheet for specific frequency limits.
• How do I ensure that the output pins are in a known state during power-up?
  To ensure that the output pins are in a known state during power-up, you can use the Output Enable (OE) pin to disable the outputs during power-up. This will prevent the outputs from floating or going to an unknown state.
• Can I use the SN74HC594DT as a level shifter?
  Yes, the SN74HC594DT can be used as a level shifter, but it's not recommended. The device is designed to operate with a single supply voltage (VCC) and is not intended for level shifting applications. If you need to level shift, it's better to use a dedicated level shifter IC.
• What is the maximum current that can be sourced or sunk by the output pins?
  The maximum current that can be sourced or sunk by the output pins of the SN74HC594DT is 25 mA. However, it's recommended to limit the current to 10 mA or less to ensure reliable operation and prevent overheating.
• Can I use the SN74HC594DT with a 3.3V or 5V microcontroller?
  Yes, the SN74HC594DT is compatible with both 3.3V and 5V microcontrollers. The device operates with a supply voltage range of 2V to 6V, making it suitable for use with a wide range of microcontrollers.