Land Defense Vehicle Communications

Soldier communicates with a radio mounted in an armored HMMWV

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 Diagram

Endura MEMS Timing for Land Vehicle Communications

Devices Frequency Stability Function Key Features
SiT5346  1 to 60 MHz
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SiT5347  60 to 220 MHz
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SiT5348  1 to 60 MHz
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SiT5349  60 to 220 MHz
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±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
Differential oscillators
SiT9346  1 to 220 MHz
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SiT9347  220 to 725 MHz
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±10 to ±50 FPGA & processor clocking 1 to 725 MHz, ±10 ppm, 0.1 ps RMS phase jitter
Single ended oscillators
SiT8944  1 to 110 MHz
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SiT8945  115 to 137 MHz
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SiT2044  1 to 110 MHz
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SiT2045  115 to 137 MHz
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±20 to ±50 FPGA & processor clocking 1 to 137 MHz, ±20 ppm, -55°C to 125°C

Endura Timing Outperforms Quartz


Lower Acceleration (g) Sensitivity

SiTime – Best-in-Class Aging
SiTime – Lower Acceleration (g) Sensitivity

Endura Timing Outperforms Quartz

SiTime   Quartz


Acceleration Sensitivity

MEMS Outperforms Quartz – Acceleration Sensitivity

Mechanical Shock

MEMS Outperforms Quartz – Mechanical Shock


MEMS Outperforms Quartz – Quality

Reliability MTBF (Million Hours)

MEMS Outperforms Quartz – Reliability MTBF (Million Hours)

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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