SN74FB2040RC datasheet by Texas Instruments

SN74FB2040RC Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74FB2040RC?
  The maximum operating frequency of the SN74FB2040RC is 100 MHz, but it can operate up to 200 MHz with a reduced voltage supply (VCC) of 2.5V.
• How do I ensure signal integrity when using the SN74FB2040RC?
  To ensure signal integrity, use a low-impedance PCB design, keep signal traces short, and use termination resistors at the receiver end. Also, consider using a clock signal with a rise time of less than 1 ns to minimize signal distortion.
• Can I use the SN74FB2040RC in a 3.3V system?
  Yes, the SN74FB2040RC can operate in a 3.3V system, but the maximum operating frequency will be limited to 50 MHz. Additionally, the output voltage swing will be reduced, which may affect signal integrity.
• How do I handle power sequencing when using the SN74FB2040RC?
  To avoid latch-up or damage, ensure that the VCC supply is powered up before the input signals. Also, ensure that the input signals are stable and within the specified voltage range before applying the clock signal.
• What is the recommended termination scheme for the SN74FB2040RC?
  The recommended termination scheme is to use a series terminator (Rs) of 33-50 ohms at the transmitter end, and a parallel terminator (Rt) of 50-100 ohms at the receiver end. This helps to reduce signal reflections and improve signal integrity.