SiTime SiT5346 Endura™ Ruggedized Super-TCXOs

SiTime SiT5346 Endura™ Ruggedized Super-Temperature-Compensated Crystal Oscillators (TCXOs) are designed for aerospace, defense, and high-reliability applications that require precision timing under sustained environmental stress. These Endura-family ruggedized super-TCXOs deliver ±100ppb over-temperature stability from -40°C to +105°C, a ±1ppb/°C frequency slope (ΔF/ΔT), and 1.5×10^-11 ADEV at a 10-second averaging interval in a 5.0mm x 3.2mm 10-pin package. DualMEMS™ temperature sensing and TurboCompensation™ maintain stability under airflow, thermal gradients, vibration, shock, and EMI.

Acceleration sensitivity reaches as low as 0.004ppb/g (typical), reducing phase noise under vibration by up to 20x compared to quartz and minimizing link and call drops in high-vibration platforms. Power-supply noise rejection of 0.2ps/mV eliminates the need for a dedicated LDO, while I²C digital frequency tuning corrects board-level frequency shifts. The SiTime SiT5346 undergoes 100% Endura process screening and meets MIL-STD-55310 and MIL-PRF-883 requirements with 1 billion-hour mean time between failures (MTBF) and a lifetime warranty.

Factory programmability supports frequencies from 1MHz to 60MHz, supply voltages of 2.5V, 2.8V, 3.0V, and 3.3V, and pull ranges from ±6.25ppm to ±3200ppm, eliminating quartz-related lead times and per-configuration NRE. Stability grades of ±0.1ppm, ±0.2ppm, and ±0.25ppm are available across -20°C to +70°C, -40°C to +85°C, and -40°C to +105°C temperature ranges. LVCMOS or clipped-sinewave output optimizes EMI and jitter performance for each system design.

Features

±100ppb over-temperature stability from -40°C to +105°C
±1ppb/°C frequency slope (ΔF/ΔT)
1.5 x 10^-11 ADEV at a 10-second averaging interval
DualMEMS temperature sensing and TurboCompensation for dynamic stability
0.004ppb/g acceleration sensitivity (typical)
20x lower phase noise under vibration compared to quartz
0.2ps/mV power-supply noise rejection - eliminates the need for a dedicated LDO
I²C digital frequency tuning for board-level frequency correction
-20°C to +70°C, -40°C to +85°C, and -40°C to +105°C temperature ranges

100% Endura process screening - meets MIL-STD-55310 and MIL-PRF-883 requirements
1 billion-hour MTBF and lifetime warranty
1MHz to 60MHz factory-programmable frequency
±0.1ppm, ±0.2, and ±0.25ppm stability grades
2.5V, 2.8V, 3.0V, and 3.3V supply voltages
±6.25ppm to ±3200ppm pull range
LVCMOS or clipped-sinewave output
5.0mm x 3.2mm, 10-pin package