PCB Layout Guidelines for Aurasemi High-Speed Clocks
This technical reference document provides detailed information about aurasemi product specifications, characteristics, and performance parameters. Use this information to support your design and analysis activities.
Electrical characteristics are specified over the operating temperature range unless otherwise noted. Parameters are guaranteed by design, testing, or statistical analysis. Typical values is the most likely parametric norm at 25°C.
Thermal characteristics require careful attention during system design. The junction-to-ambient thermal resistance depends on the mounting configuration, PCB copper area, and airflow conditions. Use thermal simulation tools to predict operating temperatures under actual conditions.
Reliability data is based on accelerated life testing and field failure analysis. Mean time between failures (MTBF) calculations follow industry-standard methodologies. Contact BeiLuo for detailed reliability reports and qualification data.
💡 FAE Insights
📋 Customer Cases
Telecom Equipment Manufacturer
Challenge
Clock jitter exceeding specification in prototype
Solution
Implemented proper grounding and filtering per layout guide
Customer Feedback
"Jitter improved from 150fs to 85fs after layout optimization"
Frequently Asked Questions
1. What trace width should I use for clock signals?
Clock trace width depends on PCB stackup and target impedance. For standard 100Ω differential impedance on FR4: (1) Microstrip - typically 4-6 mil traces with 5-8 mil spacing; (2) Stripline - typically 3-5 mil traces with 4-6 mil spacing. Use PCB manufacturer's impedance calculator for your specific stackup. Maintain consistent trace geometry along the entire length.
2. How do I minimize crosstalk between clock channels?
Minimize clock crosstalk with these techniques: (1) Separation - maintain 3W spacing between clock pairs (3× trace width); (2) Orthogonal routing - route adjacent layers orthogonally; (3) Ground shielding - use ground traces between critical clocks; (4) Layer selection - route clocks on internal layers for better isolation; (5) Termination - use proper termination to prevent reflections. For high-density designs, consider using multiple clock buffer devices to reduce fanout per channel.
3. Where can I find the latest datasheet?
The latest datasheets are available on the LiTong website in the product pages. You can also contact LiTong sales or FAE team to request the most recent documentation. Always use the latest revision for new designs.
4. How do I request technical support?
LiTong provides multiple channels for technical support: (1) Contact your local FAE directly; (2) Email technical support at support@litong.com; (3) Call the technical hotline; (4) Submit a support request through the website. For complex design questions, schedule a meeting with our FAE team. We typically respond within 24 hours.
5. Are evaluation boards available?
Yes, evaluation boards are available for most Aurasemi products. Contact LiTong sales to request evaluation boards for your application. Boards include complete documentation, schematics, and example software. Evaluation boards are typically provided free of charge to qualified customers.