Smart Watches and Fitness Trackers

Smartwatches and fitness trackers must be feature-rich, user-friendly, and beautiful. These devices must continually incorporate the latest technology to enable a growing list of functions, while at the same time consume less space and power. Plus, at the end of the day, they need to deliver accurate time with no drift.
SiTime MEMS 32 kHz oscillators provide the solution for smartwatches and activity trackers to win in both form and function – with ultra-small, low-power, high-accuracy timing.
SiTime MEMS Timing Benefits
Smallest footprint and power1.2 mm2 CSP Ultra-low power from <1 µA Ability to drive multiple loads |
Robust clocking solutions±5 ppm frequency stability Immunity to power supply noise Gas hermetically sealed |
Integrated MEMS, easy to useNo external quartz No quartz reliability issues No cover or shielding |
32 kHz MEMS Timing for Smart Watches and Fitness Trackers
Devices | Frequency Stability | Features |
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SiT1580 32.768 kHz TCXO |
±5 ppm |
Low power: <4.5 µA High robustness: Immune to small molecular gasses LVCMOS: Drive multiple loads |
SiT1552 32.768 kHz TCXO | ±5 ppm |
Low power: <1 µA NanoDrive™ technology: Optimize output swing |
SiT1532 32.768 kHz XO | ±75 ppm |
Low power: <1 µA NanoDrive™ technology: Optimize output swing |
“Garmin makes products that are engineered on the inside for life on the outside. Our innovation focuses on developing technologies that enable our customers to enrich their experiences as they pursue their passions. SiTime’s MEMS timing solutions help extend battery life across several of our product lines.”
Patrick Desbois, Executive vice president of operations, Garmin
MEMS Timing Outperforms Quartz
Lower Power |
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Smallest Size, Lower BOM |
Drive Multiple Loads |
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Best 32 kHz Oscillator Stability |
Better 32 kHz TCXO Stability |
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Watch Video: How SiTime Saves Space for IoT, Wearable, and Mobile Applications
Featured Resources
• AN10037 Optimized SiT15xx Drive Settings for 32 kHz Inputs of Low Power MCUs
• AN10040 SiT1532-32kHz XO Frequency Stability
• AN10043 Measurement Guidelines for 32 kHz SiT15xx Oscillators
• AN10046 Driving Multiple Loads with 32 kHz Nano-Power MEMS Oscillators
• Extending Battery Life of Wireless Medical Devices
• MEMS Oscillators: Enabling Smaller, Lower Power Wearables
• MEMS Timekeeper Extends Standby Life of Mobile Devices
• SiT15xx 32 kHz NanoDrive™ Output
• 8 Reasons to Replace Crystals with MEMS Oscillators
See full list of related applications notes
