SiT5811, a member of SiTime’s Epoch Platform™ MEMS OCXO family, maximizes service continuity with best-in-class time accuracy in real world environments. Designed to solve long-standing problems of quartz OCXOs, the Epoch Platform OCXOs are resilient to thermal shock, airflow, and vibration. SiT5811 simplifies and expedites the design process with 25x less volume and 3x lower power, in addition to leading environmental resilience which eliminates the need for a protective cover. SiTime’s silicon manufacturing process ensures the highest quality with shorter lead times for a robust supply chain.
The SiT5811 is the industry’s smallest OCXO (9 mm x 7 mm) to offer ±1 ppb over-temp stability, ±0.01 ppb/°C typical frequency slope (dF/dT), and up to 12 hours of time holdover. It's the first OCXO in its class to offer a temperature range as wide as -40°C to 95°C.
Related Blog: The Evolution of Precision Timing Solutions
For applications with the most demanding holdover requirements, SiT5811's holdover can be extended to 24 hours with SiTime's proprietary TimeFabric™ software: TimeFabric™ Holdover Extension
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| "Specs" | "Value" |
|---|---|
| Oscillator Type | OCXO |
| Frequency | 10 to 60 MHz |
| Frequency Stability (ppm) | ±0.001 (±1 ppb) |
| Operating Temperature Range (°C) | -20 to 70, -40 to 85, -40 to 95 |
| Package Type (mm²) | 9.0 x 7.0 |
| Voltage Supply (V) | 2.5, 2.8, 3.3 |
| Features | 12-Hour Holdover, ±10 ppt/°C frequency slope, 4E-12 HDEV at 10 seconds, 420 mW steady state power consumption |
| Availability | Production |
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Epoch OCXO package 9.0x7.0
12-Hour Holdover in real world conditions for 2x better service continuity
- ±0.1 ppb/day aging
- Inclusive of an 8°C temperature change with ITU-T recommended profile and 1 m/s airflow
Exceptional dynamic stability under airflow, fast temp. ramp
- ±1 ppb over-temp. stability from -40 to 95°C
- ±0.01 ppb/°C frequency slope (ΔF/ΔT) -- Ensures system-level quality of service for telecom and networking equipment in hostile environments
- 4E-12 HDEV at 10 second averaging time
3x lower power and 25x less volume for compact edge and datacenter devices
- 420 mW typical power consumption (3.3V)
- Robust 9.0 x 7.0 x 3.6 mm package
Best phase noise under vibration
- Minimizes call and/or link drops in high-vibration environments
No activity dips or microjumps
- Eliminates any need for costly screening or burn-in tests
On-chip power-supply noise filtering for excellent PSNR
-
Reduces BOM by eliminating a dedicated LDO for OCXO
LVCMOS or clipped sinewave output
- Optimizes for best balance between EMI and jitter
Rich programmable features
- Any frequency between 10 to 60 MHz
- 2.5, 2.8, and 3.3V power supply options
Digital frequency tuning through I2C and SPI
- Large pull range from ±3.125 to ±400 ppm
- 5E-14 frequency pull resolution
- Eliminate frequency shift caused by board noise
Superior reliability – reduces field failures and repair costs due to clock components
- 1 billion hours MTBF
- 5G Infrastructure
- 4G / 5G RRH, DU
- ITU-T G.8273.2 Class D
- Small Cells
- Datacenter Switches & Routers
- Core & Edge Routers
- Optical Transport (OTN, OLT, etc.)
- Timing Servers
- Test & Measurement
- IEEE 1588 Boundary Clocks & Grandmasters
- SONET/SDH Stratum 3E
- GNSS Disciplined Timing Modules
Frequency Slope (dF/dT) Calculator – Calculate frequency slope over temperature
| Resource Name | Resource Type | Date | Format | Size |
|---|
Step 1: Enter or Configure SiT5811 Part Number
Step 2. Purchase
Quantity
| Qty: | Unit Price | Total |
|---|---|---|
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| Quantity | Unit Price | |
|---|---|---|
| 199 | --- | |
| 100-499 | --- | |
| 500-999 | --- | |
| 1,000-4,999 | --- | |
| > 4,999 | --- |