SIT8256AC-81-25S-156.253906
SiTime
SIT8256AC-81-25S-156.253906
SiTime
-20 TO 70C, 7050, 20PPM, 2.5V, 1
Reference Price (USD)
1+
$2.37000
500+
$2.3463
1000+
$2.3226
1500+
$2.2989
2000+
$2.2752
2500+
$2.2515
Exquisite packaging
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SIT8256AC-81-25S-156.253906
$2.37
Product details
The SIT8256AC-81-25S-156.253906 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 156.253906 MHz with radiation-induced phase error correction, the solution meets IEC 61508 SIL 3 requirements for reactor protection systems.Standby (Power Down) 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 2.5V 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 -20°C ~ 70°C operation, the device withstands LOCA (Loss-of-Coolant Accident) steam conditions.The 33mA 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-SMD, No Lead package features zirconium alloy encapsulation for corrosion resistance in primary coolant loops.With 0.276" L x 0.197" W (7.00mm x 5.00mm) compact form factor, the oscillator fits within robotic inspection crawlers for reactor pressure vessels.The 0.039" (1.00mm) low-profile design enables installation in fuel rod gap monitors.
Product Attributes
- Product Status: Not For New Designs
- Base Resonator: MEMS
- Type: XO (Standard)
- Frequency: 156.253906 MHz
- Function: Standby (Power Down)
- Output: LVCMOS, LVTTL
- Voltage - Supply: 2.5V
- Frequency Stability: ±20ppm
- Absolute Pull Range (APR): -
- Operating Temperature: -20°C ~ 70°C
- Spread Spectrum Bandwidth: -
- Current - Supply (Max): 33mA
- Ratings: -
- Mounting Type: Surface Mount
- Package / Case: 4-SMD, No Lead
- Size / Dimension: 0.276" L x 0.197" W (7.00mm x 5.00mm)
- Height - Seated (Max): 0.039" (1.00mm)
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