CDCU877ZQLT datasheet by Texas Instruments

CDCU877ZQLT Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CDCU877ZQLT?
  The recommended power-up sequence is to apply VCC first, followed by VCCPLL, and then VCCIO. This ensures proper initialization and prevents damage to the device.
• How do I configure the CDCU877ZQLT for a specific clock frequency?
  The CDCU877ZQLT can be configured using the Clock Control Register (CCR) and the Clock Divider Register (CDR). The CCR sets the clock source and frequency, while the CDR sets the clock divider ratio. Refer to the datasheet for specific register settings and calculations.
• What is the maximum clock frequency supported by the CDCU877ZQLT?
  The CDCU877ZQLT supports clock frequencies up to 100 MHz. However, the maximum frequency may vary depending on the specific application, PCB layout, and environmental conditions.
• How do I ensure proper clock signal integrity and reduce jitter?
  To ensure proper clock signal integrity and reduce jitter, use a high-quality clock source, keep clock traces short and shielded, and use a low-jitter clock buffer or repeater if necessary. Additionally, follow proper PCB layout and design guidelines for clock signal routing.
• Can I use the CDCU877ZQLT with a different voltage supply than the recommended 1.8V?
  While the CDCU877ZQLT is specified for 1.8V operation, it can operate with a voltage supply between 1.7V and 1.9V. However, operating outside the recommended voltage range may affect device performance, power consumption, and reliability.