The Smart Timing Choice

The Smart Timing Choice

Silicon MEMS Outperforms Quartz

Silicon MEMS Outperforms Quartz Rev. 1.1

www.sitime.com

Best Vibration Robustness

High-vibration environments are all around us. All electronics,

from handheld devices to enterprise servers and storage

systems are subject to vibration. Figure 5 shows a comparison

of vibration robustness.

Why is SiTime Best in Class:

• The moving mass of SiTime’s MEMS resonators is up to

3000 times smaller than quartz

• Center-anchored MEMS resonator is the most robust

design

Best Shock Robustness

SiTime’s oscillators can withstand at least 50,000 g shock.

They all maintain their electrical performance in operation

during shock events. A comparison with quartz devices is

shown in Figure 6.

Why is SiTime Best in Class:

• The moving mass of SiTime’s MEMS resonators is up to

3000 times smaller than quartz

• Center-anchored MEMS resonator is the most robust

design

0.10

1.00

10.00

100.00

10

100

1000

VibrationFrequency(Hz)

VibrationSensitivityvs. Frequency

SiTime

TXC

Epson

Connor Winfield

Kyocera

SiLabs

SiTime

Up to 30x

Better

14.3

12.6

3.9

2.9

2.5

0.6

0

2

4

6

8

10

12

14

16

Kyocera

Epson

TXC

CW

SiLabs

SiTime

Differential XO Shock Robustness - 500 g

SiTime

Up to 25x

Better

Notes:

1. Data Source: Reliability documents of named companies.

2. Data source: SiTime and quartz oscillator devices datasheets.

3. Test conditions for Electro Magnetic Susceptibility (EMS):

• According to IEC EN61000-4.3 (Electromagnetic compatibility standard)

• Field strength: 3V/m

• Radiated signal modulation: AM 1 kHz at 80% depth

• Carrier frequency scan: 80 MHz – 1 GHz in 1% steps

• Antenna polarization: Vertical

• DUT position: Center aligned to antenna

Devices used in this test:

SiTime, SiT9120AC-1D2-33E156.250000 - MEMS based - 156.25 MHz

Epson, EG-2102CA 156.2500M-PHPAL3 - SAW based - 156.25 MHz

TXC, BB-156.250MBE-T - 3rd Overtone quartz based - 156.25 MHz

Kyocera, KC7050T156.250P30E00 - SAW based - 156.25 MHz

Connor Winfield (CW), P123-156.25M - 3rd overtone quartz based - 156.25 MHz

SiLabs, Si590AB-BDG - 3rd overtone quartz based - 156.25 MHz

4. 50 mV pk-pk Sinusoidal voltage.

Devices used in this test:

SiTime, SiT8208AI-33-33E-25.000000, MEMS based - 25 MHz

NDK, NZ2523SB-25.6M - quartz based - 25.6 MHz

Kyocera, KC2016B25M0C1GE00 - quartz based - 25 MHz

Epson, SG-310SCF-25M0-MB3 - quartz based - 25 MHz

5.

Devices used in this test: same as EMS test stated in Note 3.

6. Test conditions for shock test:

• MIL-STD-883F Method 2002

• Condition A: half sine wave shock pulse, 500-g, 1ms

• Continuous frequency measurement in 100 μs gate time for 10 seconds

Devices used in this test: same as EMS test stated in Note 3