Ruggedized Oscillators

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) – 50% 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

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

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

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

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

SiTime MEMS 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

SiTime's ruggedized low-frequency devices are ultra-small, low-power solutions that provide new architectural options for applications where space, power, and reliability are critical. These devices use MEMS resonators that are manufactured using the latest generation of EpiSeal™ technology which hermetically seals the resonator, making it immune to external atmospheric elements.

• New EpiSeal resonators: impervious to all small-molecule gases
• Small footprint: 1.2 mm2 (1.5 x 0.8 mm) CSP
• Ultra-low power: as low as 4.5 μA
• Low jitter: as low as 2.2 ns integrated RMS phase jitter
• SiT1580 ±5-ppm TCXO: all-inclusive frequency stability for improved local timekeeping and system power
• SiT1581 ±50-ppm oscillator: all-inclusive frequency stability and wide frequency range