Land Defense Vehicle Communications

Land Defense Vehicle Communications

Operational effectiveness is reliant on the rapid exchange of information. And vehicle communication equipment relies on ruggedized timing components that can survive the toughest operating conditions. These timing solutions must survive shock, vibration, and dynamic temperatures, while offering low power consumption and small size.

SiTime ruggedized Endura™ timing solutions are built to operate in harsh environments, overcoming the inherent weaknesses of quartz and delivering low failure rates, long-term reliability, and robust performance.

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SiTime Ruggedized Endura MEMS Timing Benefits

Precision Timing

20x better mechanical shock survivability

±100 ppb up to 105°C

Digital tuning to ±5 ppt

Most Robust in Harsh Conditions

4x better vibration resistance

4x better dF/dT, airflow and heat resistant

Extended operating temperature range

Higher Reliability

Conforms to MIL-PRF-55310

No quartz reliability issues

No cover or shielding

Land Defense Vehicle Communications block diagramsitime.comSiT934xSiT894xSiT204xsitime.comSiT534x

Endura MEMS Timing for Land Vehicle Communications

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 1 to 220 MHz, 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 1 to 725 MHz, ±10 ppm, 0.1 ps RMS phase jitter

SiT8944 Single ended XO

SiT8945 Single ended XO

SiT2044 Single ended XO

SiT2045 Single ended XO

1 to 110 MHz

115 to 137 MHz

1 to 110 MHz

115 to 137 MHz

±20 to ±50

1 to 137 MHz, ±20 ppm, -55°C to 125°C

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 Timing Outperforms Quartz- Acceleration Sensitivity


Mechanical Shock

Image: MEMS Timing Outperforms Quartz - Mechanical Shock



Image: MEMS Timing Outperforms Quartz - Quality


Reliability MTBF (Million Hours)

Image: MEMS Timing 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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