SIT8918BE-21-XXE-25.000000
SiTime
SIT8918BE-21-XXE-25.000000
SiTime
MEMS OSC XO 25.0000MHZ LVCMOS
Reference Price (USD)
1+
$2.93000
500+
$2.9007
1000+
$2.8714
1500+
$2.8421
2000+
$2.8128
2500+
$2.7835
Exquisite packaging
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SIT8918BE-21-XXE-25.000000
$2.93
Product details
The SIT8918BE-21-XXE-25.000000 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 XO (Standard), this oscillator implements triple-modular redundancy with <1ms failover time, critical for safety-critical nuclear control systems.Operating at 25 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 LVCMOS, LVTTL configuration includes fiber-optic isolation for noise immunity in high-electromagnetic-interference containment buildings.With 2.25V ~ 3.63V operating range, the device maintains operation during station blackout scenarios with backup power fluctuations.Achieving ±20ppm stability with neutron flux compensation, the oscillator enables precise timing in neutron flux monitoring chambers.Rated for -40°C ~ 105°C operation, the device withstands LOCA (Loss-of-Coolant Accident) steam conditions.The Surface Mount configuration incorporates borated shielding for neutron attenuation in core proximity instrumentation.The 4-SMD, No Lead package features zirconium alloy encapsulation for corrosion resistance in primary coolant loops.With 0.126" L x 0.098" W (3.20mm x 2.50mm) 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: Active
- Base Resonator: MEMS
- Type: XO (Standard)
- Frequency: 25 MHz
- Function: Enable/Disable
- Output: LVCMOS, LVTTL
- Voltage - Supply: 2.25V ~ 3.63V
- Frequency Stability: ±20ppm
- Absolute Pull Range (APR): -
- Operating Temperature: -40°C ~ 105°C
- Spread Spectrum Bandwidth: -
- Current - Supply (Max): -
- Ratings: -
- Mounting Type: Surface Mount
- Package / Case: 4-SMD, No Lead
- Size / Dimension: 0.126" L x 0.098" W (3.20mm x 2.50mm)
- Height - Seated (Max): 0.031" (0.80mm)
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