CD74HCT194E datasheet by Texas Instruments

CD74HCT194E Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the CD74HCT194E can handle?
  The CD74HCT194E can handle clock frequencies up to 30 MHz, but it's recommended to check the timing specifications in the datasheet for specific clock frequency and duty cycle requirements.
• How do I ensure that the CD74HCT194E is properly powered and decoupled?
  To ensure proper power and decoupling, connect VCC to a 5V power supply, and decouple the power pins with 0.1uF ceramic capacitors to ground. Additionally, use a 10uF electrolytic capacitor to filter the power supply.
• What is the maximum current that the CD74HCT194E can sink or source?
  The CD74HCT194E can sink or source up to 6mA per output pin, but it's recommended to check the output current specifications in the datasheet for specific output loading conditions.
• How do I handle the asynchronous reset input (MR) during power-up?
  During power-up, the asynchronous reset input (MR) should be tied to VCC through a pull-up resistor to ensure that the device resets properly. A 1kΩ to 10kΩ pull-up resistor is recommended.
• What is the recommended layout and routing for the CD74HCT194E?
  To minimize noise and signal integrity issues, it's recommended to follow good PCB layout and routing practices, such as keeping signal traces short, using ground planes, and avoiding signal traces near the clock input.