SN74ACT8990FN datasheet by Texas Instruments

SN74ACT8990FN Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74ACT8990FN?
  The maximum operating frequency of the SN74ACT8990FN is 100 MHz, but it can vary depending on the system design and capacitive loading.
• How do I ensure signal integrity when using the SN74ACT8990FN?
  To ensure signal integrity, use proper PCB design techniques such as impedance matching, signal routing, and decoupling. Also, follow the recommended layout guidelines in the datasheet.
• Can I use the SN74ACT8990FN in a 3.3V system?
  Yes, the SN74ACT8990FN is compatible with 3.3V systems, but ensure that the input voltage (VCC) is within the recommended range of 4.5V to 5.5V. You may need to use level translators or voltage regulators to interface with 3.3V devices.
• How do I handle power sequencing when using the SN74ACT8990FN?
  Power sequencing is critical when using the SN74ACT8990FN. Ensure that the power supply voltage (VCC) is applied before the input signals, and that the power-down sequence is reversed during shutdown.
• What is the recommended termination scheme for the SN74ACT8990FN?
  The recommended termination scheme for the SN74ACT8990FN is a series terminator (Rs) of 33 ohms to 50 ohms, depending on the system requirements. You may also need to add parallel terminators (Rt) and capacitors (Ct) for optimal signal integrity.