Selection reference · illustrative scenario
Clock roles in the application
Lightweight wearables need timekeeping, sensing and phone connectivity; confirm any independent positioning or other wireless features for the actual product.
Engineering selection review
Review the low-power reference, sensor timing, host inputs and sleep duty cycle. A package reduction also requires ESR/CL or active-output comparison.
Procurement and documentation
Include controller, sensing and connectivity and rtc input and calibration, plus the existing full code, sample and production quantities and delivery target. Discuss nominated international brands and domestic candidates separately, confirming parameters and documents by part.
Illustrative validation scenario
Record power and timing over the actual sensing/phone-sync cycle, checking start-up and wake behavior across battery voltages.
Inquiry & validation checklist
- Controller, sensing and connectivity
- RTC input and calibration
- Package and electrical conditions
- Sleep cycle and battery corners
