74LVX245TTR datasheet by STMicroelectronics

74LVX245TTR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the 74LVX245TTR?
  The maximum operating frequency of the 74LVX245TTR is 100 MHz, but it can vary depending on the output load and supply voltage.
• How do I ensure signal integrity when using the 74LVX245TTR in a high-speed application?
  To ensure signal integrity, use a low-impedance PCB design, keep signal traces short, and use termination resistors if necessary. Also, consider using a signal integrity analysis tool to simulate and optimize your design.
• Can I use the 74LVX245TTR in a 3.3V system, and if so, what are the implications?
  Yes, the 74LVX245TTR can be used in a 3.3V system, but the output voltage will be limited to 3.3V. This may affect the noise margin and signal integrity, especially if the receiving device expects a 5V signal. Ensure that the receiving device is compatible with 3.3V signals.
• How do I handle power sequencing when using the 74LVX245TTR in a system with multiple power domains?
  To avoid latch-up or damage, ensure that the VCC pin is powered up before the input signals, and that the input signals are stable before the output enable (OE) pin is asserted. Consider using a power sequencing controller or a reset controller to manage power-up and power-down sequences.
• What is the recommended layout and routing for the 74LVX245TTR to minimize EMI and noise?
  Keep the device close to the receiving device, use a ground plane, and route signals in a way that minimizes loop area and reduces radiation. Avoid routing signals near the device's power pins, and use decoupling capacitors to reduce noise and EMI.