SN74HC174NSR datasheet by Texas Instruments

SN74HC174NSR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HC174NSR can handle?
  The maximum clock frequency of the SN74HC174NSR is 100 MHz, but it can vary depending on the operating voltage and load capacitance. It's recommended to check the timing characteristics in the datasheet for specific frequency limits.
• How do I ensure that the SN74HC174NSR is properly powered and decoupled?
  To ensure proper power and decoupling, connect the VCC pin to a stable 2-6V power supply, and decouple the power supply lines with 0.1uF and 10uF capacitors. Additionally, use a 10kΩ pull-up resistor on the OE (output enable) pin if it's not driven by a logic signal.
• What is the maximum current that the SN74HC174NSR can sink or source?
  The SN74HC174NSR can sink up to 25mA and source up to 25mA per output pin, but the total current should not exceed 100mA for the entire device.
• How do I handle the asynchronous clear (CLR) input?
  The CLR input is an asynchronous active-low input that clears the flip-flops when driven low. To ensure proper operation, drive the CLR input with a logic signal that meets the input voltage and current requirements, and avoid driving it with a signal that's slower than the clock frequency.
• What is the propagation delay of the SN74HC174NSR?
  The propagation delay of the SN74HC174NSR varies depending on the operating voltage and temperature. At 5V and 25°C, the typical propagation delay is around 10-15ns, but it can range from 5-30ns depending on the specific conditions. Check the datasheet for more information.