KCCS
Precision Timing
Cost-effective 1PPS-disciplined oscillator for high-volume applications. 0.01 ppm frequency accuracy, compact SMD package.
| Model | Package (mm) | Output | Supply | Temp. Range | Holdover Capability | Phase Noise (Typ) | Freq. Range |
|---|---|---|---|---|---|---|---|
| KDO11 | DIP 14.8×11.8×5 | Sine/CMOS | 3.3V/5V | -40~+105℃ | 1PPS sync: 50ns (RMS<30ns), f-T: ±10 ppb | 1kHz: -143 dBc/Hz @128MHz | 10~150 MHz |
| KDO9 | DIP 12.5×9.0×2.5 | Sine/CMOS | 3.3V/5V | -40~+105℃ | 1PPS sync: 50ns (RMS<30ns), f-T: ±0.1 ppb | 1kHz: -138 dBc/Hz @30.72MHz | 10~52 MHz |
| KDO5 | DIP 7×5×3 | Sine/CMOS | 3.3V/5V | -40~+105℃ | ≤10 μs holdover (3min discipline, 30min @25±5℃), f-T: ±50 ppb | 1kHz: -143 dBc/Hz @30.72MHz | 10~52 MHz |
A disciplined oscillator locks a high-stability OCXO to an external 1PPS reference (typically from GNSS/GPS). When the reference is available, the OCXO is continuously corrected; when lost, it enters holdover mode, maintaining accuracy based on its learned aging and temperature characteristics.
Holdover is the period when a disciplined oscillator operates without an external 1PPS reference, relying on the OCXO's intrinsic stability. KCCS disciplined OCXOs achieve <=1.5 us/24h holdover accuracy, while the micro version achieves <=5 us/24h.
KCCS 1PPS-disciplined oscillators achieve <=50 ns alignment accuracy between the output 1PPS and the input GNSS 1PPS reference when locked. Frequency accuracy while locked is <=0.01 ppm.
During GNSS outages, the disciplined oscillator enters holdover mode, maintaining timing accuracy based on the OCXO's learned behavior. KCCS units maintain <=1.5 us/24h in holdover. For extended outages, an OCXO with higher stability grade is recommended.
Our technical team can help you choose the optimal oscillator for your specific application requirements.