Tactical Manpack Radio

Tactical Manpack Radio

Reliable communication in the field is critical. Ruggedized timing solutions used in tactical radios must deliver ultra-high reliability and withstand harsh and dynamic environments, while at the same time offer low power consumption and small size. SiTime ruggedized Endura™ timing solutions are designed to endure tough battlefield conditions—such as shock, vibration, temperature perturbation, and noisy environments—in a small footprint.

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SiTime Ruggedized Endura MEMS Timing Benefits

Precision Timing

Best phase noise under vibration

±0.54 ppm 20-year aging

±100 ppb from -55°C to 105°C

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

Most Robust in Harsh Conditions

Best acceleration sensitivity, 0.004 ppb/g

30,000 g mechanical shock survivability

Exceeds MIL-STD-810H profile

Extended operating temp range

Higher Reliability

Conforms to MIL-PRF-55310

1,900M hours MTBF

Hermetically sealed

No cover or shielding needed

ManPack Radios block diagramSiT934x32 kHz Rugged TCXOSiT934xSiT934xSiT204xSiT534xSiT892xsitime.com

Endura MEMS Timing Solutions for Manpack Radios

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
SiT1580 32 kHz TCXO 32.768 kHz ±5 Time-keeping 32.768 kHz, ±5 ppm, 2.5 nsRMS IPJ, 1.2 mm2 CSP

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, 0.23 ps RMS phase jitter

Endura Timing Outperforms Quartz


Lower Acceleration (g) Sensitivity

Image: Graphs - Best-In-Class Aging Image: Graphs - Lower Acceleration and (g) Sensitivity

Endura Timing Outperforms Quartz

SiTime   Quartz

Acceleration Sensitivity

Image: MEMS Outperforms Quartz in Acceleration Sensitivity


Mechanical Shock

Image: MEMS Outperforms Quartz in Mechanical Shock Resistance



Image: MEMS Outperforms Quartz in Quality


Reliability MTBF (Million Hours)

Image: MEMS Outperforms Quartz in 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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