Ruggedized GNSS

Soldier is Using Laptop Computer and Radio for Communication During Military Operation in the Desert

GPS receivers are essential for military navigation, and accurate timing is essential to the GPS system. Precision timing components must provide the highest stability in the most dynamic conditions. If timing fails, receivers lose lock to satellites and navigation systems won’t receive critical data.

SiTime ruggedized Endura™ timing solutions are built to reliability operate in harsh environments, overcoming the inherent weaknesses of quartz and delivering robust performance—even under high levels of mechanical shock and vibration or extreme and rapidly changing temperatures.

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SiTime Ruggedized Endura MEMS Timing Benefits

Precision Timing

±100 ppb from -55°C to 105°C

Maintains stable satellite link

3.5 ppb/°C dF/dT, no lock loss under dynamic conditions

No Activity dips or micro jumps

Most Robust in Harsh Conditions

Best acceleration sensitivity, 0.004 ppb/g

Hermetically sealed, heat resistant

Extended operating temp range

Best performance under shock & vibration

Higher Reliability

Conforms to MIL-PRF-55310

1,900M hours MTBF

30,000 g mechanical shock survivability

No cover or shielding needed

Watch Video: Oscillator dynamic performance in GPS application

Ruggedized GNSS Block Diagram

Endura MEMS Timing Solutions for GPS

Devices	Frequency Stability	Function	Key Features
Super-TCXOs SiT5146 1 to 60 MHz SiT5147 60 to 220 MHz SiT5346 1 to 60 MHz SiT5347 60 to 220 MHz SiT5348 1 to 60 MHz SiT5349 60 to 220 MHz SiT5543 1 to 60 MHz SiT5541 1 to 60 MHz	±0.5 to ±2.5 ppm ±0.5 to ±2.5 ppm ±0.1 to ±0.25 ppm ±0.1 to ±0.25 ppm ±0.05 ppm ±0.05 ppm ±5 ppb ±10 ppb	Synchronous System	1 to 220 MHz, 0.004 ppb/g, temperature stability as good as ±5 ppb, ±0.3 ppb/°C
32.768 kHz TCXO SiT7910	±0.1 ppm	Time-keeping	32.768 kHz, ±200 ppb temperature stability, 2.5 x 2.0 ceramic

Devices

Frequency Stability

Function

Key Features

Super-TCXOs

SiT5146 1 to 60 MHz

SiT5147 60 to 220 MHz

SiT5346 1 to 60 MHz

SiT5347 60 to 220 MHz

SiT5348 1 to 60 MHz

SiT5349 60 to 220 MHz

SiT5543 1 to 60 MHz

SiT5541 1 to 60 MHz

±0.5 to ±2.5 ppm

±0.1 to ±0.25 ppm

±0.05 ppm

±5 ppb

±10 ppb

Synchronous System

1 to 220 MHz, 0.004 ppb/g, temperature stability as good as ±5 ppb, ±0.3 ppb/°C

32.768 kHz TCXO

SiT7910

±0.1 ppm

Time-keeping

32.768 kHz, ±200 ppb temperature stability, 2.5 x 2.0 ceramic

Endura MEMS Timing Outperforms Quartz

Best Frequency Stability over Temperature	Best Aging
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Best Frequency Stability under Vibration	Best Phase Noise under Random Vibration
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Best Shock Survivability	Best Reliability
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Endura Timing Outperforms Quartz

▀ SiTime ▀ Quartz

Acceleration Sensitivity

Mechanical Shock

Quality

Reliability MTBF (Million Hours)

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