Fitness Trackers

Close-up image of sportsman checking his pulse on smart watch

Fitness trackers and smartwatches must be feature-rich, user-friendly, and beautiful. These devices must continually incorporate the latest technology to enable a growing list of functions to monitor health and fitness activity, while at the same time consume less power and deliver accurate time with no drift, in a small form factor.

SiTime MEMS 32 kHz oscillators enable activity trackers and watches to win in both form and function, with an ultra-small, low-power, high-accuracy timing solution.

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SiTime MEMS Timing Benefits

Smallest footprint and power

1.2 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 use

No external quartz

No quartz reliability issues

No cover or shielding

Smart Watches and Fitness Trackers Block Diagram

32 kHz MEMS Timing for Smart Watches and Fitness Trackers

Devices	Frequency Stability	Features
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

Devices

Frequency Stability

Features

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

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

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Fitness Trackers