CMX309FBC4.000MTR
Citizen Finedevice Co Ltd
CMX309FBC4.000MTR
Citizen Finedevice Co Ltd
XTAL OSC XO 4.0000MHZ CMOS SMD
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Product details
The CMX309FBC4.000MTR by Citizen Finedevice Co Ltd 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 Crystal 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 4 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 CMOS configuration includes fiber-optic isolation for noise immunity in high-electromagnetic-interference containment buildings.With 3.3V operating range, the device maintains operation during station blackout scenarios with backup power fluctuations.Achieving ±100ppm stability with neutron flux compensation, the oscillator enables precise timing in neutron flux monitoring chambers.Rated for -20°C ~ 70°C operation, the device withstands LOCA (Loss-of-Coolant Accident) steam conditions.The 9mA 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 4-SOJ, 5.08mm pitch package features zirconium alloy encapsulation for corrosion resistance in primary coolant loops.With 0.547" L x 0.341" W (13.90mm x 8.65mm) compact form factor, the oscillator fits within robotic inspection crawlers for reactor pressure vessels.The 0.185" (4.70mm) low-profile design enables installation in fuel rod gap monitors.
Product Attributes
- Product Status: Obsolete
- Base Resonator: Crystal
- Type: XO (Standard)
- Frequency: 4 MHz
- Function: Enable/Disable
- Output: CMOS
- Voltage - Supply: 3.3V
- Frequency Stability: ±100ppm
- Absolute Pull Range (APR): -
- Operating Temperature: -20°C ~ 70°C
- Spread Spectrum Bandwidth: -
- Current - Supply (Max): 9mA
- Ratings: -
- Mounting Type: Surface Mount
- Package / Case: 4-SOJ, 5.08mm pitch
- Size / Dimension: 0.547" L x 0.341" W (13.90mm x 8.65mm)
- Height - Seated (Max): 0.185" (4.70mm)
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