Ruggedized Oscillators/TCXOs/OCXOs

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  • Ruggedized Oscillators/TCXOs/OCXOs

The SiTime Endura™ ruggedized oscillators are built for aerospace, defense, and industrial automation applications that demand ultra-high resiliency to a wide range of harsh environmental conditions. These silicon MEMS-based devices deliver the lowest acceleration sensitivity, best shock and vibration resistance, high-reliability (>2.2 billion hours MTBF), and superior dynamic performance under airflow, thermal gradients, pressure, and power supply noise.

Endura products can be factory-programmed to any combination of frequency, stability, and voltage within a wide range of parameters, eliminating the long lead times and customization costs associated with quartz products. All Endura oscillators are 100% screened through the SiTime Endura process flow to provide high reliability.

Epoch OCXO package 9.0x7.0

Ruggedized OCXOs

Endura Epoch Platform™ MEMS OCXOs (oven-controlled oscillators) solve the long-standing problems of legacy quartz OCXOs which are sensitive to environmental stressors and are difficult to use. These OCXOs boost the resilience of PNT systems by providing reliable holdover if the system loses the GPS signal. In addition to increased robustness, Endura OCXOs deliver improved size, weight, and power (SWaP). Compared to traditional g-sensitivity rated quartz OCXOs, Endura OCXOs provide the following benefits.

  • Up to 70X better g-sensitivity 
  • Up to 30X higher shock survivability, rated at 20,000 g 
  • Up to 20X better frequency over temperature
  • Up to 4X better Allan deviation
  • Up to 20X smaller footprint at 9.0 x 7.0 mm and lower height at 3.6 mm
  • Up to 300X less weight than vibration compensated designs, at 0.35 grams
  • Up to 2X lower power, rated at 420 mW 
  • Unmatched ease-of-use, eliminates restrictions on PCB placement, minimal shielding needed for thermal isolation
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT7101 Contact Sales 10 to 60 MHz ±0.003 (±3 ppb) ±0.005 (±5 ppb) Regulated LVCMOS Clipped Sinewave 2.5 2.8 3.3 -20 to 70 -40 to 85 -40 to 95 9.0 x 7.0
SiT7102 Contact Sales 60 to 220 MHz ±0.003 (±3 ppb) ±0.005 (±5 ppb) Regulated LVCMOS 2.5 2.8 3.3 -20 to 70 -40 to 85 -40 to 95 9.0 x 7.0
SiT7111 Contact Sales 10 to 60 MHz ±0.001 (±1 ppb) Regulated LVCMOS Clipped Sinewave 2.5 2.8 3.3 -20 to 70 -40 to 85 -40 to 95 9.0 x 7.0
SiT7112 Contact Sales 60 to 220 MHz ±0.001 (±1 ppb) Regulated LVCMOS 2.5 2.8 3.3 -20 to 70 -40 to 85 -40 to 95 9.0 x 7.0
Image: Elite Ceramic 5032 10-pin package, top & bottom

Ruggedized MHz Super-TCXOs

Endura ruggedized Super-TCXOs are tight stability (±0.05 ppm to ±2.5 ppm), 1 to 220 MHz precision oscillators, engineered to deliver the most stable timing under environmental stressors – airflow, rapid temperature change, shock, vibration, poor power supply, and EMI.

  • Best acceleration sensitivity, 0.004 ppb/g (typ) – 50x better than quartz
  • 30,000g mechanical shock and 70g vibration resistance
  • Airflow and thermal shock resistant, 0.9 ppb/°C (ΔF/ΔT)
  • Excellent Allen deviation (ADEV), 1.5e-11, 10s averaging time
  • Low power supply noise rejection (PSNR), 0.2 ps/mV
  • I2C digital frequency tuning eliminates external DAC and sensitivity to board noise
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT5146 Buy Now 1 to 60 MHz ±0.5 ±1 ±2.5 LVCMOS Clipped Sinewave 2.5 2.8 3 3.3 -20 to +70 -40 to +85 -40 to +105 -55 to +105 5.0 x 3.2 10-pin
SiT5147 Buy Now 60 to 220 MHz ±0.5 ±1 ±2.5 LVCMOS 2.5 2.8 3 3.3 -20 to +70 -40 to +85 -40 to +105 5.0 x 3.2 10-pin
SiT5346 Buy Now 1 to 60 MHz ±0.1 ±0.2 ±0.25 LVCMOS Clipped Sinewave 2.5 2.8 3 3.3 -20 to +70 -40 to +85 -40 to +105 5.0 x 3.2 10-pin
SiT5347 Buy Now 60 to 220 MHz ±0.1 ±0.2 ±0.25 LVCMOS 2.5 2.8 3.0 3.3 -20 to +70 -40 to +85 -40 to +105 5.0 x 3.2 10-pin
SiT5348 Buy Now 1 to 60 MHz ±0.05 LVCMOS Clipped Sinewave 2.5 2.8 3 3.3 0 to +70 5.0 x 3.2 10-pin
SiT5349 Buy Now 60 to 220 MHz ±0.05 LVCMOS 2.5 2.8 3 3.3 0 to +70 5.0 x 3.2 10-pin
SiT5541 Buy Now 1 to 60 MHz ±0.01 (±10 ppb) ±0.02 (±20 ppb) LVCMOS Clipped Sinewave 2.5 ±10% 2.8 ±10% 3.0 ±10% 3.3 ±10% -40 to 85 -40 to 105 7.0 x 5.0
SiT5543 Buy Now 1 to 60 MHz ±0.005 (±5 ppb) LVCMOS Clipped Sinewave 2.5 ±10% 2.8 ±10% 3.0 ±10% 3.3 ±10% -40 to 85 -40 to 95 7.0 x 5.0
LVCMOS Ruggedized Oscillators 4-pin Package Top Bottom

LVCMOS Ruggedized Oscillators

SiTime offers ruggedized single-ended Endura oscillators for defense and aerospace applications with a wide range of features. These devices deliver the perfect combination of wide frequency range (1 to 137 MHz), excellent stability (±20 ppm), and wide temperature range (-55 to 125°C) – in any combination.

  • Low acceleration sensitivity, 0.1 ppb/g
  • Wide operating temperature, -55 to +125°C
  • Industry-standard QFN packages, as small as 2.0 mm x 1.6 mm
  • SOT23-5 leaded package for higher board-level reliability and manufacturability
  • FlexEdge™ configurable rise/fall time for EMI reduction
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT2044 Buy Now 1 to 110 MHz ±20 ±25 ±50 LVCMOS 1.8 2.5 to 3.3 -40 to +105 -40 to +125 -55 to +125 SOT23 (2.9x2.8)
SiT2045 Buy Now 115 to 137 MHz ±20 ±25 ±50 LVCMOS 1.8 2.5 to 3.3 -40 to +105 -40 to +125 -55 to +125 SOT23 (2.9x2.8)
SiT8944 Buy Now 1 to 110 MHz ±20 ±25 ±30 ±50 LVCMOS 1.8 2.5 to 3.3 -40 to +105 -40 to +125 -55 to +125 2.0x1.6 2.5x2.0 3.2x2.5 5.0x3.2 7.0x5.0
SiT8945 Buy Now 115 to 137 MHz ±20 ±25 ±30 ±50 LVCMOS 1.8 2.5 to 3.3 -40 to +105 -40 to +125 -55 to +125 2.0x1.6 2.5x2.0 3.2x2.5 5.0x3.2 7.0x5.0
LVPECL / LVDS / HCSL Ruggedized Oscillator 6-pin Package Top Bottom

LVPECL / LVDS / HCSL Ruggedized Oscillators

SiTime offers Endura high-performance differential oscillators for high reliability aerospace and defense applications. These ruggedized devices provide low jitter and power supply noise rejection (PSNR) in the presence of environmental hazards, such as shock, vibration, noisy power supply, and EMI.

  • Low acceleration sensitivity, 0.1 ppb/g
  • Low 0.21 ps RMS jitter (typ.) in small industry-standard packages
  • ±10 ppm with better dynamic stability in harsh environmental conditions
  • Precise frequency steering, digital tuning to ±5 ppt
  • Any frequency from 1 MHz to 725 MHz with 6 decimal places of accuracy
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT9346 Buy Now 1 to 220 MHz ±10 ±20 ±25 ±50 LVCMOS LVPECL HCSL 2.5 2.8 3 3.3 -40 to +105 3.2x2.5 5.0x3.2 7.0x5.0
SiT9347 Buy Now 220 to 725 MHz ±10 ±20 ±25 ±50 LVPECL LVDS HCSL 2.5 2.8 3 3.3 -40 to +105 3.2x2.5 5.0x3.2 7.0x5.0
SiT9356 Buy Now 1 to 220 MHz ±20 ±50 LVPECL LVDS HCSL Low-power HCSL FlexSwing 1.8 ±5% 2.5 ±10% 3.3 ±10% 2.25 to 3.63 1.71 to 3.63 -40 to 85 -40 to 105 -40 to 125 -55 to 125 2.0 x 1.6 2.5 x 2.0 3.2 x 2.5
SiT9357 Buy Now 220 to 900 MHz ±20 ±50 LVPECL LVDS HCSL Low-power HCSL FlexSwing 1.8 ±5% 2.5 ±10% 3.3 ±10% 2.25 to 3.63 1.71 to 3.63 -40 to 85 -40 to 105 -40 to 125 -55 to 125 2.0 x 1.6 2.5 x 2.0 3.2 x 2.5
SiT9551 Buy Now 14 standard frequencies from 25 MHz to 644 MHz ±20 ±50 LVPECL LVDS HCSL Low-power HCSL FlexSwing 1.8 ±5% 2.5 ±10% 3.3 ±10% 2.25 to 3.63 1.71 to 3.63 -40 to 85 -40 to 105 -40 to 125 -55 to 125 2.0 x 1.6 2.5 x 2.0 3.2 x 2.5
2520-4-Pin-Ceramic-MEMS-Oscillator

Ruggedized 32.768 kHz TCXOs

Endura ruggedized 32.768 kHz Super-TCXO is designed for pulse-per-second (pps) timekeeping in aerospace, defense and other applications that operate in harsh environments.

  • 25x better stability compared to quartz
  • Wide operating temperature, up to -55 to +105°C
  • Best-in-class 20 ppb/g g-sensitivity for resilience in high vibration environments
  • Low 2-ns RMS phase jitter
  • 6.0 µA power consumption, 30x lower than quartz
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT7910 Buy Now 32.768 kHz ±0.1 ±0.2 ±0.4 LVCMOS 1.8 1.62 to 3.63 -40 to 85 -40 to 105 -55 to 105 2.5x2.0 ceramic
Digitally Controlled Ruggedized Oscillator 6-pin Package Top Bottom

Digitally Controlled Ruggedized Oscillators

SiTime's Endura DCXOs enable users to program output frequency and pull frequency in-system using a digital interface (I2C or SPI), offering designers great flexibility for noiseless clock synchronization. This ruggedized family offers ultra-low acceleration sensitivity and low jitter.

  • Ideal for replacing multiple timing components in systems that support multiple frequencies
  • Any-frequency mode for programming output frequency via I2C or SPI from 1 MHz to 725 MHz
  • Frequency pulling/tuning up to ±3200 ppm via I2C or SPI with 0.005 ppb resolution and <1% linearity
  • Low 0.21 ps RMS (typ.) integrated phase jitter
  • Low acceleration sensitivity, 0.1 ppb/g
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT3541 Buy Now 1 to 340 MHz ±20 ±25 ±50 LVPECL LVDS HCSL 2.5 to 3.3 -40 to +85 5.0 x 3.2 10-pin
SiT3542 Buy Now 340 to 725 MHz ±20 ±25 ±50 LVPECL LVDS HCSL 2.5 to 3.3 -40 to +85 5.0 x 3.2 10-pin
Voltage-Controlled Ruggedized Oscillator 6-pin Package Top Bottom

Voltage-Controlled Ruggedized Oscillators

SiTime Endura VCXOs provide exceptional dynamic performance and high reliability for defense and aerospace applications. These ruggedized devices are engineered to maintain phase noise performance and frequency tuning accuracy in harsh environmental conditions.

  • Any frequency from 1 MHz to 725 MHz in 1 Hz step
  • Wide pull range, ±25  to ±3200 ppm, with <1% linearity
  • Low jitter, 0.21 ps RMS (12k to 20MHz)
  • Low power supply noise rejection (PSNR), 0.05 ps/mV
  • Low acceleration sensitivity, 0.1 ppb/g
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT3342 Buy Now 1 to 220 MHz ±15 ±25 ±35 ±50 LVPECL LVDS HSCL 2.5 2.8 3.0 3.3 -40 to +105 3.2x2.5 5.0x3.2 7.0x5.0
SiT3343 Buy Now 220 to 725 MHz ±25 ±30 ±50 LVPECL LVDS HCSL 2.5 2.8 3.0 3.3 -40 to +105 3.2x2.5 5.0x3.2 7.0x5.0
Spread Spectrum Ruggedized Oscillator 4-pin Package Top Bottom

Spread Spectrum Ruggedized Oscillators

SiTime’s Endura EMI-reduction oscillators ensure emissions compliance through two techniques: spread spectrum clocking and rise/fall time adjustment of the clock signal. These ruggedized devices, engineered for harsh environments, have ultra-low acceleration sensitivity and high temp operation.

  • EMI reduction up to 17 dB on fundamental frequency and 30 dB on harmonics
  • Wide spread range, up to 4% pk-to-pk
  • FlexEdge™ configurable rise/fall time options: 0.25 ns to 40 ns slew rates
  • Low acceleration sensitivity, 0.1 ppb/g
  • Wide operating temperature, -55 to +125°C
  • Small industry-standard QFN packages, as small as 2.0 mm x 1.6 mm
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm)
SiT9045 Buy Now 1 to 150 MHz ±20 ±25 ±50 LVCMOS 1.8 2.25 to 3.3 -55 to +125 2.0x1.6 2.5x2.0 3.2x2.5