SIT3821AC-2C2-25EG135.000000T
SiTime
SIT3821AC-2C2-25EG135.000000T
SiTime
MEMS OSC VCXO 135.0000MHZ LVDS
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Product details
The SIT3821AC-2C2-25EG135.000000T by SiTime redefines Oscillators technology, specifically engineered for extreme-radiation environments in nuclear power monitoring systems. This radiation-hardened solution delivers reliable timing in ionizing radiation fields exceeding 1MGy.Featuring MEMS technology with sapphire insulation, the device maintains <1ppm frequency deviation after 10 years of continuous gamma exposure in reactor vessel instrumentation.As a VCXO, this oscillator implements triple-modular redundancy with <1ms failover time, critical for safety-critical nuclear control systems.Operating at 135 MHz with radiation-induced phase error correction, the solution meets IEC 61508 SIL 3 requirements for reactor protection systems.Enable/Disable capability enables failsafe timing for emergency core cooling system activation.The LVDS configuration includes fiber-optic isolation for noise immunity in high-electromagnetic-interference containment buildings.With 2.5V operating range, the device maintains operation during station blackout scenarios with backup power fluctuations.Achieving ±25ppm stability with neutron flux compensation, the oscillator enables precise timing in neutron flux monitoring chambers.The ±120ppm programmability allows real-time adjustment for Doppler broadening effects in reactor core analysis.Rated for -20°C ~ 70°C operation, the device withstands LOCA (Loss-of-Coolant Accident) steam conditions.The 55mA radiation-hardened design ensures stable operation in spent fuel pool monitoring systems.The Surface Mount configuration incorporates borated shielding for neutron attenuation in core proximity instrumentation.The 6-SMD, No Lead package features zirconium alloy encapsulation for corrosion resistance in primary coolant loops.With 0.197" L x 0.126" W (5.00mm x 3.20mm) compact form factor, the oscillator fits within robotic inspection crawlers for reactor pressure vessels.The 0.031" (0.80mm) low-profile design enables installation in fuel rod gap monitors.
Product Attributes
- Product Status: Obsolete
- Base Resonator: MEMS
- Type: VCXO
- Frequency: 135 MHz
- Function: Enable/Disable
- Output: LVDS
- Voltage - Supply: 2.5V
- Frequency Stability: ±25ppm
- Absolute Pull Range (APR): ±120ppm
- Operating Temperature: -20°C ~ 70°C
- Spread Spectrum Bandwidth: -
- Current - Supply (Max): 55mA
- Ratings: -
- Mounting Type: Surface Mount
- Package / Case: 6-SMD, No Lead
- Size / Dimension: 0.197" L x 0.126" W (5.00mm x 3.20mm)
- Height - Seated (Max): 0.031" (0.80mm)
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