Unmanned Aerial Vehicles

Unmanned Aerial Vehicles

UAVs are exposed to harsh conditions such as shock, vibration, and extreme weather. They need a ruggedized timing solution that is as tough as the environment in which they operate. MEMS timing provides robust performance with the best acceleration sensitivity, better phase noise under vibration, and excellent stability over wide temp ranges.

SiTime ruggedized Endura™ timing products begin with hermetically sealed MEMS resonators coupled with advanced mixed-signal ICs to provide a system solution that yields higher reliability and robust performance under dynamic conditions.

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SiTime Ruggedized Endura MEMS Timing Benefits

Precision Timing

Better phase noise under vibration

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

±100 ppb from -55°C to 105°C

No Activity dips or micro jumps

Most Robust in Harsh Conditions

Best acceleration sensitivity, 0.004 ppb/g

30,000g mechanical shock survivability

Exceeds MIL-STD-883F, Method 2002 standard

Extended operating temp range

Higher Reliability

Conforms to MIL-PRF-55310

1,900M hours MTBF

Hermetically sealed

No cover or shielding needed

UAV block diagramSiT1580SiT894xSiT894xSiT534xSiT934xSiT934xSiT894xsitime.comSiT534x

Endura MEMS Timing Solutions for UAV

Devices Frequency Frequency Stability Function Key Features

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

±0.1 to ±0.25

±0.1 to ±0.25



Reference clock for baseband 0.004 ppb/g, ±100 ppb, ±1 ppb/°C

SiT9346 Differential XO

SiT9347 Differential XO

1 to 220 MHz

220 to 725 MHz

±10 to ±50 FPGA & processor clocking 0.23 ps RMS phase jitter

SiT8944 Single-ended XO

SiT8945 Single-ended XO

1 to 110 MHz

115 to 137 MHz

±20 to ±50 Processor clocking AEC-Q100, 2.0x1.6 mm
SiT1580 32 kHz TCXO 32.768 kHz ±5 Time-keeping 2.5 ns RMS IPJ, 1.2 mm2 CSP

Endura Timing Outperforms Quartz


Lower Acceleration (g) Sensitivity

Image: MEMS Timing Outperforms Quartz in Aging Image: MEMS Timing Outperforms Quartz in Acceleration (g) Sensitivity

Endura Timing Outperforms Quartz

SiTime   Quartz

Acceleration Sensitivity

Image: MEMS Outperforms Quartz - Acceleration Sensitivity comparison


Mechanical Shock

Image: MEMS Outperforms Quartz - Mechanical Shock



Image: MEMS Outperforms Quartz - Quality


Reliability MTBF (Million Hours)

Image: MEMS Outperforms Quartz - Reliability MTBF


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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