Ruggedized GNSS

Ruggedized GNSS

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.

Download Application Brief

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

Ruggedized GNSS block diagramsitime.comSiT1580Endura TCXO SiT5xxxEndura TCXO32 kHz Rugged TCXO

Endura MEMS Timing Solutions for GPS

Devices Frequency Frequency Stability Function Key Features

SiT5146 Super-TCXO

SiT5147 Super-TCXO

SiT5346 Super-TCXO

SiT5347 Super-TCXO

SiT5348 Super-TCXO

SiT5349 Super-TCXO

1 to 60 MHz

60 to 220 MHz

1 to 60 MHz

60 to 220 MHz

1 to 60 MHz

60 to 220 MHz

±0.5 to ±2.5

±0.5 to ±2.5

±0.1 to ±0.25

±0.1 to ±0.25



Synchronous System 1 to 220 MHz, 0.004 ppb/g, ±100 ppb, ±1 ppb/°C
SiT1580 32 kHz TCXO 32.768 kHz ±5 Time-keeping 32.768 kHz, ±5 ppm, 2.5 ns RMS IPJ, 1.2 mm2 CSP

Endura Timing Outperforms Quartz


Lower Acceleration (g) Sensitivity

Image: Super-TCXO vs Quartz Aging comparison graph Image: Super-TCXO vs Quartz Acceleration (g) Sensitivity comparison graphs

Endura Timing Outperforms Quartz

SiTime   Quartz

Acceleration Sensitivity

Image: MEMS vs Quartz Acceleration Sensitivity comparison


Mechanical Shock

Image: MEMS vs Quartz Mechanical  Shock Sensitivity comparison



Image: MEMS vs Quartz Quality comparison


Reliability MTBF (Million Hours)

Image: MEMS vs Quartz Reliability comparison


Tested in Accordance with MIL Specifications

MIL-PRF-55310 Test Single-ended XO Differential XO/VCXO/DCXO TCXO Shock g-Sensitivity Frequency aging g-Sensitivity, constant acceleration Phase noise under vibration Frequency-temperature stability with hysteresis Ambient pressure Allan deviation n/a n/a Frequency-temperature stability with hysteresis and trim effect n/a
3.6.15 Retrace n/a n/a Modulation frequency response n/a Acceleration survivability
3.6.7 Frequency warm up n/a n/a
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