CD74HCT299M96 datasheet by Texas Instruments

CD74HCT299M96 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the CD74HCT299M96?
  The maximum clock frequency is typically limited by the propagation delay of the device, which is around 20-30 ns. However, the recommended maximum clock frequency is around 10-15 MHz to ensure reliable operation.
• How do I ensure that the CD74HCT299M96 is properly powered and decoupled?
  It's essential to provide a stable power supply with a decoupling capacitor (e.g., 0.1 μF) as close as possible to the VCC pin. Additionally, ensure that the power supply voltage is within the recommended range of 4.5 V to 5.5 V.
• Can I use the CD74HCT299M96 with a 3.3 V power supply?
  Although the CD74HCT299M96 is specified for 5 V operation, it can be used with a 3.3 V power supply. However, the output voltage levels will be lower, and the device may not meet the specified propagation delay and output current requirements.
• How do I handle the asynchronous reset input (RST) on the CD74HCT299M96?
  The RST input should be asserted low (typically with a pull-down resistor) to reset the device. When RST is high, the device will operate normally. Ensure that the RST signal is synchronized with the clock signal to avoid metastability issues.
• What is the recommended clock signal rise and fall time for the CD74HCT299M96?
  The recommended clock signal rise and fall time is around 1-5 ns to ensure reliable operation. Faster rise and fall times may cause issues with the device's internal clock buffering.